• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method for manufacturing a magnetic coil assembly of a band-shaped conductor, which is slotted in the longitudinal direction with the exception of its two end regions (2, 3), so that the band-shaped conductor to a first and a second half band (4) and two of these half bands (4) a) the first half band (4) of the slotted band-shaped conductor is on a first intermediate coil (14) and the second half band (5) of the slotted band-shaped conductor is on a second intermediate spool (15) wound up; b) alternately sub-steps of type b1) and of type b2) are carried out, b1) from the first intermediate coil (14) are wound on a winding body (9) of the magnetic coil arrangement one or more windings (12a, 12b) of the first half-band (4 ), and b2) from the second intermediate spool (15), one or more turns (12a, 12b) of the second half-band are wound onto the same spool (9). The invention provides a method with which in a simple manner, a slotted, band-shaped conductor to a magnetic coil arrangement, with which strong magnetic fields can be generated, can be wound. In particular, the method also relates to the winding of magnet coil assemblies of high temperature superconducting materials (HTS materials).
    公开号:CH705535B1
    申请号:CH01588/12
    申请日:2012-09-06
    公开日:2016-03-15
    发明作者:Robert Schauwecker；Robert Herzog；Riccardo Tediosi；Matteo Alessandrini
    申请人:Bruker Biospin Ag；
    IPC主号:
    专利说明:

    The invention relates to a method for producing a magnetic coil assembly of a band-shaped conductor, which is slotted in the longitudinal direction with the exception of its two end portions, so that the band-shaped conductor has a first and a second half-band and two these half bands to a closed loop connecting end portions ,
    Such a method has become known from WO 2007/004 787 A2.
    In order to generate strong magnetic fields, superconducting magnetic coils are used. The current circulating in the superconducting magnet coils is carried practically without ohmic losses. Magnetic coils, which are wound with wires from classical low-temperature superconductors (LTS) such as NbTi or Nb3Sn, are already widely used in practice, in particular in NMR spectroscopy (nuclear magnetic resonance spectroscopy, from the English "nuclear magnetic ») and imaging NMR. The magnetic field strength limits the resolution in each case.
    In order to further increase the magnetic field strength that can be generated, attempts are being made worldwide to use high-temperature superconductors (HTS) in superconducting magnetic coils. HTS materials generally allow higher magnetic field strengths than LTS materials at the same low temperature (usually around 4 K) (even beyond 20 Tesla); at higher temperatures (about 15 to 50 K), where typical LTS materials are already normally conducting, HTS materials can still produce high field strengths (5 to 15 Tesla).
    However, HTS materials typically have ceramic properties and have a layered crystal structure; the properties of the HTS materials (including the current carrying capacity) depend strongly on the direction relative to the orientation of the layered crystal (anisotropy). In practice, it has hitherto been advantageous to use HTS materials in layers, which are often very thin, as part of strip-shaped conductors.
    In recent years, significant improvements in the production and in the quality of band-shaped HTS conductors have been achieved, especially in the so-called YBCO (yttrium barium copper oxide) coated conductors (YBCO coated conductors). For the production of magnetic coils using HTS materials therefore winding arrangements and winding methods that are suitable for band-shaped conductors come to the fore.
    For some high field applications, shorted superconducting solenoids with extremely small loop resistance (typically less than 10 pΩ) are required. With superconducting joints (also called splices or joints) of band-shaped HTS conductors such small loop resistances are currently not feasible.
    From WO 2007/004 787 A2 it is known to bypass the connection problem of tapes with a continuous superconducting layer by means of a slot along the tape. The two half-bands produced in this way are connected via non-slotted end regions, so that an uninterrupted loop is created for a superconducting current path. As a structure for a superconducting electromagnet, it is proposed in WO 2007/004 787 A2 to wind one flat coil each with the half bands. One of the flat coils is then rotated by 180 °, so that the magnetic fields of the two flat coils add up during operation. However, this results in a considerable twisting of at least one half band in the two end regions; The resulting mechanical stress can damage the conductor, which impairs the current carrying capacity and thus also the achievable magnetic field is reduced. For larger, solenoid-like coils, it is proposed to slit the tape several times longitudinally and to wind a flat coil for each sub-band.
    From J. Kosa et al., Application Possibilities with Continuous YBCO Loops made of HTS wire, Journal of Physics: Conference Series 234 (2010), 032030, is a winding arrangement for a longitudinally slotted, with the exception of its end portions, slit-shaped Superconductor has become known in which no twisting occurs at the end regions. Several, serial loops are formed from a conductor loop, whereby they are performed by each other. This approach is difficult and practicable only for a small number of loose turns, and is particularly unsuitable for winding turns on a package.
    From US Pat. No. 7,566,684 B1, a method has become known in which, on only one winding body, the half bands of a slotted band are wound into a double flat coil. The half bands are connected only at one end and therefore do not form a closed conductor loop.
    Object of the invention
    The invention has for its object to provide a method available, with a simple way, a slotted, band-shaped conductor to a magnet coil arrangement, with the strong magnetic fields can be generated, can be wound.
    Brief description of the invention
    This object is achieved by a method of the type mentioned, which is characterized by the following steps:a) <SEP> the first half band of the slit band-shaped conductor is wound on a first intermediate spool and the second half band of the slit band-shaped conductor is wound on a second intermediate spool;<tb> b) <SEP> alternately sub-steps of type b1) and of type b2) are executed, with<b> b1) <SEP> from the first intermediate coil, one or more turns of the first half band are wound on a bobbin of the magnet coil arrangement, and<b> b2) <SEP> from the second intermediate coil, one or more turns of the second half-band are wound on the same bobbin.
    The inventive method provides a machine well implementable winding method, with which the two half bands of a slotted conductor on a common winding body (also referred to as a winding core) can be wound. For this purpose, in step a), the two half bands are first rewound to each have their own intermediate coil. This makes it possible, in a simple manner subsequently during the actual winding of the magnet coil arrangement in step b) to wind one or more turns of the first half-band in temporal change with one or more turns of the second half-band on the same winding body. By this procedure, a compact magnet arrangement, which carries both half bands and is therefore suitable for particularly strong magnetic fields available.
    The inventive method allows a virtually arbitrary distribution of turns of the two half bands on the common bobbin. In particular, it is easily possible to arrange windings of both half-bands on the winding body such that the magnetic fields generated by the two half-bands completely add up. Likewise, layers can be made with a variety of helically wound turns. This makes it possible to generate with the magnet assembly and axially extended magnetic fields of high homogeneity.
    The ribbon-shaped conductor is typically superconducting; Preferably, the band-shaped conductor comprises a high-temperature superconducting material (such as YBCO); HTS materials with a transition temperature of more than 40 K. are particularly preferred.
    In the context of step b) at least one sub-step of the type b1) and a sub-step of the type b2) is executed, so that at least once must be changed between the substeps. In the case of a change from a sub-step of the type b1) to a sub-step of the type b2) (or vice versa), the intermediate reel to be unwound is changed. Preferably, the intermediate coil to be unwound is changed after winding an even number of layers.
    A layer refers to a plurality of axially adjacent turns, which are wound on the same radius on the winding body (directly or even on an already wound on the winding body layer) over at least part of the axial length of the winding body, wherein the adjacent turns ( directly) are electrically and mechanically connected in series. Typically, the turns are wound helically within a layer; but it is also a circular winding over almost 360 ° with a two adjacent turns connecting S-shaped wire segment ("wiggle") on the remaining angle possible. It should be noted that the winding body (and also the intermediate coils) may have a circular cross section or else a different cross section, for example a square or polygonal cross section; the term of the winding radius is generally the distance to the magnetic center of the magnet assembly perpendicular to the magnetic field direction.
    Preferred variants of the invention
    Preferred is a variant of the inventive method, in which between substeps of type b1) and of type b2) at least twice, preferably at least four times, is changed. As a result, more complex winding processes can be realized. In particular, an approximately the same length for both half-bands can be involved (with the same total number of windings for both half-bands).
    In an advantageous variant, the two half bands are helically wound on the intermediate coils in each case with a plurality of axially adjacent turns in step a), in particular wherein the circumferences of the two intermediate coils are selected identical or nearly identical to the circumference of the winding body. The helical / layerwise winding of the intermediate coils is advantageous because the winding radius varies less during unwinding than in flat coils. The circumferences of all three coils should be approximately the same (regardless of the nature of the winding of the half bands on the intermediate bobbins) throughout the actual winding process (step b), so that the intermediate coils do not or at least not move when moving on a circular path around the bobbin essentially rotate around its own axis. When the winding body rotates, this and the active intermediate coil should turn as synchronously as possible without their spacing changing significantly. Preferably, the circumferences of the intermediate coils and of the winding body, taking into account the thickness of the wound layers, differ by a maximum of 1%, preferably a maximum of 0.5%, particularly preferably a maximum of 0.2%, at each time of the actual winding process (step b). With sufficiently few superposed layers and / or small strip thicknesses, the wound layers can be neglected, and the occurring winding wheel differences require no compensation measures. As a rule, the intermediate coil circumference and the wound body circumference (each without wound layers) are selected to be identical or with a maximum difference of 1%, preferably 0.5%, particularly preferably 0.2%. The cross sections of the intermediate coils and the winding body are preferably chosen circular.
    Particularly preferred is a variant which provides that in step a) the winding of the two intermediate coils takes place simultaneously, in particular wherein the two intermediate coils are arranged coaxially or nearly coaxially and are rotated synchronously. The simultaneous winding of the two intermediate coils usually saves an intermediate storage of half band. With coaxial arrangement and synchronous rotation, a single drive (usually an electric motor) can be used for both intermediate coils. Typically, the two half bands are wound on the two intermediate rotating bobbins with respect to the direction of travel in axially opposite directions.
    Also preferred is a method variant in which in step a) one of the two end bands connecting the half bands moves through between the two half bands each time the intermediate coils rotate. The end portion of the band-shaped conductor ("double band"), with which the wrapping on the intermediate spools begins, is applied to these two intermediate spools so that the end region once through the slot of the double belt with each revolution of these coils. Thus, the topologically necessary twist of the two half bands is produced during wrapping. Note that the intermediate coils typically rotate synchronously.
    In an advantageous variant, in step b) in each case a plurality of axially adjacent turns helically wound on the winding body to at least one layer, in particular with at least five axially adjacent turns per layer, each layer having a plurality of axially includes adjacent turns. By helical winding, higher turns count can be achieved than e.g. by stacking several flat coils. The number of changes between substeps can be reduced by layer-wise winding.
    Note that for this variant (and the following variants) in principle any part of all sub-steps regardless of the type or all sub-steps can be selected.
    An advantageous further development of this variant provides that in step b) in each case one or more double layers of the half band are wound onto the winding body of the magnet coil arrangement in at least one sub-step of the respective intermediate coil. The two layers of a respective double layer are wound directly (without intermediate layer of the other half band) on each other, wherein the axial winding direction between the two layers of the double layer reverses (wrap «back and forth»); Thus, the start and end of a double layer at the same axial position (typically at one axial end of the magnetic coil assembly), whereby the overall process is simplified. Knotting the half bands are avoided.
    In another advantageous development of the above process variant, one or more layers are wound over the full axial length of the wound body in this step in step b) in at least one sub-step. As a result, half-band changes are avoided axially within the length of the winding body, which mechanical loads of the conductor can be reduced in the individual case.
    A further development of the above process variant provides that in step b) in at least one substep b1) one or more layers are wound over only a portion of the axial length of the winding body on this, and that in step b) in at least one Sub-step b2) one or more layers are wound only over a further portion of the axial length of the winding body. By this embodiment, the distribution of the turns of the two half bands in the magnet coil arrangement can be made more free. First subsection and further subsection are not overlapping in the axial direction. The axial length of the winding body can basically be divided into any number of subsections (in particular also three or more) which are each covered with their own winding packages.
    In a further development of the above method variant, layers of the first and second half bands are wound radially one above the other onto the winding body in step b). As a result, the turns of the various half bands in the axially identical region can generate a magnetic field.
    Another, particularly preferred variant of the method provides that before step a), the two half bands are twisted against each other in one of the end regions, in particular by 180 °, and so twisted are applied to the intermediate coils for winding, and that after step a ) the intermediate coils are tilted against each other so that the twist of the half bands is canceled at this end again. As a result, the finished wound magnet coil arrangement is free of twists of the half bands; the correspondingly reduced mechanical load on the half bands leads to greater current carrying capacities and thus greater magnetic field strengths. The pre-twisting before and during step a) does not lead to damage of the band-shaped conductor with sufficient length of the feed lines (such as between a bearing coil and the two intermediate coils); typically the feed path is at least fifty times longer than the width of a half band.
    Also preferred is a variant in which in step a) of the slotted band-shaped conductor is unwound from a storage coil on which the two half bands are arranged axially adjacent to each other, in particular wherein the bearing coil is selected as a flat coil. This makes a simple rewinding possible. Alternatively, the band-shaped conductor can be slit immediately before the rewinding on the intermediate coils, such as by laser cutting.
    Also preferred is a variant of the method, wherein during step b) the intermediate coils and the winding body are aligned substantially parallel to each other. As a result, tilting of half band during wrapping can be largely avoided.
    In a particularly preferred variant of the method it is provided that in the substeps of the type b1) and b2) respectivelyone of the intermediate coils is arranged coaxially to the winding body and mechanically coupled to the winding body, and the other intermediate coil is radially spaced, but is arranged parallel to the winding body,and by a rotation of the winding body together with the one intermediate coil and a synchronous rotation of the other intermediate coil half-band from the other intermediate coil is wound on the winding body,wherein each rotation of the winding body, a band portion which connects the two intermediate coils together, once axially outside the bobbin past the side facing away from the intermediate coil side, and once axially out past the other intermediate coil on the side facing an intermediate coil side. This variant can be carried out in a relatively small space and is based on easily performed rotations of the coils. The winding body together with the one intermediate coil is thereby preferably held and driven on the axial side facing away from the winding body of the one intermediate coil, whereas the other intermediate coil is held and driven on its axial side facing away from an intermediate coil. In a change between substeps b1) and b2) typically two of the three coils (usually the intermediate coils) are spatially offset. Preferably, the three coils (with their axes) are all aligned horizontally. The band portion connecting the two intermediate coils typically includes one of the end portions of the conductor. The band portion which connects the two intermediate coils, by means of a bracket which is fixed to the other intermediate coil and rotates with it, are guided, wherein the bracket during a rotation also pivots about the winding body and this axially laterally on the one of the intermediate coil encompasses the opposite side.
    Another, preferred process variant provides that in the substeps of the type b1) and b2) respectivelyone of the intermediate coils is guided on a circular path relative to the winding body and the other intermediate coil remains at rest,wherein each revolution, a band section of the conductor, which connects the two intermediate coils, once axially out past the bobbin,and wherein each revolution, the one intermediate coil once axially on a band portion of the conductor, which connects the other intermediate coil and the winding body, is passed over. Typically, the bobbin is stationary, and the intermediate coils alternately orbit the bobbin. The band portion of the conductor interconnecting the two intermediate coils typically includes one of the end portions of the conductor; The guiding of the band section can be simplified with a bracket which is fastened to the winding body. Preferably, the coils are aligned with their axes all vertical or horizontal. In this variant, only one coil is in motion at any time, which can simplify the process control in individual cases.
    In the context of the present invention, a magnetic coil assembly produced according to an above-described inventive method, from a band-shaped conductor, which is slotted in the longitudinal direction except its two end portions, so that the band-shaped conductor a first and a second half band and two end bands connecting these half bands to form a closed loop, characterized in that at least one turn of the first half band and at least one turn of the second half band are wound on a common winding body, in particular wherein the magnet coil arrangement is wound with a method according to the invention described above is. The magnetic coil arrangement according to the invention can easily be manufactured by machine. As a rule, the magnet coil arrangement is superconducting; It is preferably operated in superconducting short circuit ("persistent mode") and thus allows the generation of high and temporally constant magnetic fields. Magnetic coil arrangements according to the invention can be used in particular in NMR spectroscopy and in imaging NMR.
    Preferred is an embodiment of the inventive magnetic coil arrangement, wherein the slotted, band-shaped conductor comprises a high-temperature superconducting material, in particular wherein the band-shaped, slotted conductor is a YBCO-coated conductor. By using HTS materials particularly high magnetic field strengths can be generated, or it can operate at relatively high temperatures and thus reduce the cooling effort (such as a cooling with inexpensive liquid nitrogen instead of expensive liquid helium).
    A preferred embodiment provides that the two half bands are helically wound in layers on the winding body, wherein each layer comprises a plurality of axially adjacent turns, in particular at least five axially adjacent turns. With this, easily solenoid-shaped magnet coil assemblies can be fabricated with which strong magnetic fields of high homogeneity can be obtained in a wide range.
    Also advantageous is an embodiment in which layers of the first and second half bands are wound radially one above the other onto the winding body. This allows a particularly good overlap of the magnetic fields of the windings of the first and the second half band and thus a particularly high magnetic field strength can be achieved.
    Particularly preferred is an embodiment in which the radial sequence of layers of the first half-band and the second half-band is chosen so that in the layers of the magnetic coil arrangement, an approximately equal length of the first half-band and the second half-band is involved, in particular wherein the radial sequence includes one or more sections in which N plies of the first half band, then 2N plies of the second half band, and then again N plies of the first half band follow each other radially, with N: plies basis number of the section, where N ∈IN. In general, by slotting a band-shaped conductor equal Halbbandlängen arise. By the same entangled half-tape length disturbing, not wound remaining sections of a half-band can be avoided.
    Further advantages of the invention will become apparent from the description and the drawings. Likewise, according to the invention, the above-mentioned features and those which are still further developed can each be used individually for themselves or for several in any desired combinations. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention within the scope of the claims.
    Detailed description of the invention and drawing
    The invention is illustrated in the drawings and will be explained in more detail with reference to embodiments. Show it:<Tb> FIG. 1 <SEP> is a schematic representation of a wound, slotted band-shaped conductor, as it can be used in a magnetic coil assembly according to the invention;<Tb> FIG. 2 <SEP> a schematic representation of the rewinding of a slotted strip-shaped conductor from a storage spool to two intermediate spools according to the method according to the invention;<Tb> FIG. 3a <SEP> a schematic representation of the winding of a half-band from an intermediate coil onto a winding body according to a first variant of the method according to the invention ("planetary winding");<Tb> FIG. 3b is a schematic representation of a sub-variant of the first method variant of FIG. 3a, wherein a non-active intermediate coil is arranged axially adjacent to the winding body;<Tb> FIG. 4a, 4b show schematic plan views of the winding of a half-band from the first intermediate coil (FIG. 4a) and from the second intermediate coil (FIG. 4b) onto the common winding body according to the first variant of the method according to the invention;<Tb> FIG. 5a-5d show winding diagrams of various magnetic coil arrangements according to the invention that can be wound with the method according to the invention, with layers wound over the entire length of the wound body and equally long entangled half-bands (FIGS. 5a, 5b), with half-bands wound in block-wise fashion (FIG. 5c), FIG. and no-turn wound half-bands (Figure 5d);<Tb> FIG. FIG. 6 is a schematic representation of a magnet coil arrangement according to the invention wound between four radially stacked winding packages each consisting of a half band and the method according to the invention, including half band transitions between corresponding blocks; FIG.<Tb> FIG. 7 <SEP> a schematic representation of the winding of a half-band from an intermediate coil onto a winding body according to a second variant of the method according to the invention with horizontal coils ("synchronous rotation");<Tb> FIG. 8 <SEP> a schematic representation of the winding of a half-band from an intermediate coil onto a winding body according to the second variant, with the use of a bow;<Tb> FIG. 9a-9h <SEP> a schematic representation of the time sequence of winding a half-band from an intermediate coil onto a winding body according to the first variant via one revolution of the intermediate coil;<Tb> FIG. 10a-10h <SEP> is a schematic representation of the time sequence of winding a half-band from an intermediate coil onto a winding body according to the sub-variant (FIG. 3b) of the first variant via one revolution of the intermediate coil;<Tb> FIG. 11a-11h <SEP> is a schematic representation of the time sequence of winding a half-band from an intermediate coil onto a winding body according to the second variant over a full rotation of the intermediate coil, with horizontal coils;<Tb> FIG. 12 <SEP> a schematic representation of a compensation mechanism for different rotational speeds of the intermediate coil and the winding body during a winding process according to the invention due to noticeably variable winding radii.
    Fig. 1 shows a schematic representation of a band-shaped conductor 1, for example, on a flexible steel substrate, a buffer layer (buffer layer) of CeO2, a superconducting layer of YBCO material, a capping layer of gold and a stabilizing layer (shunt layer) made of copper bears. The band-shaped conductor 1 is slotted along its longitudinal direction, with the exception of two end regions (end sections) 2, 3, so that it decays over most of its length into two half strips 4, 5. For better distinction, a first half band 4 is marked with dashes (hatched), and a second half band 5 is marked with dots; This mark is also used in the following figures.
    The half bands 4, 5 form over the two end portions 2, 3 a closed loop conductor. In the context of the invention, the half bands 4, 5 are wound in a manner further below on a common winding body (not shown in Fig. 1), so that a magnetic coil assembly is formed in the interior of which a strong, homogeneous and temporally stable magnetic field can be generated ,
    The two half bands 4, 5 are helically wound here in each case, wherein the helix of the second half band 5 is arranged radially outside the helix of the first half band 4, and wherein the helices are coaxially positioned about a magnetic field axis MA. If a closed loop current flows through the conductor loop formed by the conductor 1 (see the arrows in Fig. 1), the currents in the two half-band helices produce magnetic fields which are equally directed and amplify each other; the entire magnetic field in the interior of the magnet coil arrangement is aligned substantially parallel to the magnetic field axis MA and centered with respect to the magnetic field axis MA.
    For a better visibility of the individual half bands 4, 5, the winding radius of the second half band 5 is shown enlarged. With tight winding on a winding body (see Fig. 3a, 3b, 7, 8) only slightly more half-band 5 is involved as a half-band 4 on the winding body, which can be compensated if necessary at the end regions 2, 3. It should be noted that a suitable winding length of the two half bands 4, 5 can be established by means of suitable layer sequences (compare FIGS. 5a-5d).
    FIG. 2 illustrates a possibility of carrying out step a) of the winding method according to the invention, that is to say the rewinding of the half bands onto two intermediate coils.
    On a bearing coil 6, which is designed here as a flat coil with a vertical axis LA, the already slotted band-shaped conductor 1 is wound with the first half-band 4 next to the second half-band 5. The length of the prepared slotted strip-shaped conductor 1 corresponds to the length required for the magnet coil arrangement to be produced, plus some reserve. The two half bands 4, 5 are wound on a first intermediate coil 14 and a second intermediate coil 15. The two here horizontally aligned intermediate coils 14, 15 can be arranged coaxially and via a common drive (not shown in detail) are rotated synchronously about their common axis GZA; at the same time the bearing coil 6 is rotated about its axis LA.
    The end portion (end portion) 3 of the band-shaped conductor 1 was applied according to the invention to the intermediate coils 14, 15, that the half bands are twisted by 180 ° from each other, see. twisted portion 7. The twisted portion 7 is set sufficiently long so that twisting does not result in damage to the tape-shaped conductor 1 (usually with a length of the twisted portion 7 of at least fifty times the width B of a half-tape). The end region 3 and the twisted section 7 are entrained at each revolution in the region between the intermediate coils 14, 15 or between the tapering half bands 4, 5 (see the arrow departing from the end region 3).
    Also in the area of the feed 8 of the half bands 4, 5, these are rotated by a total of 180 ° from each other; the first half band 4 is tilted by 90 ° to the left, and the second half band 5 by 90 ° to the right. The area of the feed 8 is in turn chosen so long that a mechanical damage of the band-shaped conductor 1 is not expected (usually with a length of the feed 8, here from the last pulley to the respective intermediate coil surface, of at least fifty times the width B of a half band) ,
    After the rewinding operation, the two intermediate coils 14, 15 are tilted so that the twists are canceled again, in which case the outer ends of the intermediate coils 14, 15 are each pivoted upward to the respective other intermediate coil 14, 15. The twist in step a) is therefore only temporary.
    From the wound intermediate coils then the half bands can be wound on a bobbin in a step b) to the actual magnet coil assembly. 3a illustrates in a first process variant ("planetary winding") a first substep b1).
    After an end portion (here the end portion 2) was applied with a sufficient length of a section for game 10 to a winding body 9, the first intermediate coil 14 is pivoted on a circular path KB to the stationary winding body 9 (or its axis WA) (See arrow); the intermediate coil 14 and the winding body 9 are aligned parallel. By the pivoting movement half-band 4 is wrapped by the first intermediate coil 14 ("active coil") on the winding body 9. The first intermediate coil 14 and the winding body 9 have an approximately equal circumference, so that the first intermediate coil 14 need not rotate about its axis ZA in this movement, and also the winding body 9 does not need to rotate about its axis WA. The second intermediate coil 15, which is arranged parallel to the coils 14, 9, is at rest during this wrapping ("non-active coil").
    During one revolution of the first intermediate spool 14, this slips under a band portion 13a (including the front end portion 2 and the backlash portion 10); In other words, the intermediate coil 14 is guided axially inwardly on the band section 13a. Also, another band portion 13b (here including a portion 11 for play and the rear end portion 3), which connects the intermediate coils 14, 15 with each other, performed under the winding body 9. The first intermediate coil 14 can be guided and held from below, and the winding body 9 can be held from above.
    When the desired number of turns is wound on the winding body 9 (in Fig. 3a are so far two turns 12a, 12b wound on the winding body 9 completely), the active (intermediate) coil is changed, ie, the first intermediate coil 14 then remains at rest, and the second intermediate coil 15 then moves on a circular path around the winding body 9, corresponding to a substep b2).
    3b illustrates a sub-variant of the first variant of the method, in which the non-active, second intermediate coil 15 is arranged coaxially to the winding body 9 above this. The circular movement of the first intermediate coil 14 is marked with the circle KB; Meanwhile, the remaining coils 9, 15 remain at rest. Also in this case, the active, first intermediate coil 14 slips under the band portion 13 a, and a part of the band portion 13 b in the area between the intermediate coil 14 and end portion 3 is guided under the winding body 9. Advantageously, the half band is stiffened between intermediate coil 14 and end region 3 for better guidance, for example by attachment to or in a stirrup (cf., stirrup 30 in FIG. 3b, shown by dashed lines, which here holds half band portion 13b in the region of a knee 26). The remainder of the band portion 13b (such as between the intermediate spool 15 and the portion of the knee 26) is deformed during the circular motion (i.e., its flexibility is stressed); Thus, for example, the region of the knee 26 in the band section 13b can trace a circular path KB2 substantially corresponding to the circular path KB but radially spaced therefrom, while the large loop of the band section 13b (left front in FIG. 3b) narrows and widened becomes. It should be noted that while the knee 26 always remains right in front of the winding body 9.
    The two sub-steps b1) and b2) for the first variant of the method are explained in greater detail in FIGS. 4a and 4b in plan view.
    4a summarizes the movements of sub-step b1) explained in FIG. 3a: the first intermediate spool 14 travels on the circular path KB about the stationary winding body 9, wherein half-belt 4 is wound onto the winding body 9, while the second intermediate spool 15 rests.
    In the substep of b2), illustrated in Fig. 4b, the second intermediate coil 15 moves on a circular path KB about the winding body 9, wherein second half-band 5 is wound on the winding body 9, while the first intermediate coil 14 rests.
    In the illustration of Figures 3 to 4b, the three coils 9, 14, 15 are vertically oriented. Note that the coils 9, 14, 15 can all be oriented horizontally. Preferably, however, all coils 9, 14, 15 are aligned parallel to each other in this variant.
    FIGS. 5a to 5d illustrate various winding schemes that can be used within the scope of the winding method according to the invention in order to manufacture corresponding magnet coil arrangements according to the invention. A solid line stands in each case for a turn of the first half-band 4, and a dotted line stands for a turn of the second half-band 5. Note that in FIGS. 5a to 5c for simplicity, the helical course of the turns within the respective layers not is shown.
    In the winding diagram of the magnetic coil assembly 20 of Fig. 5a is first wound on the winding body 9, a double layer DL over the entire length L of the bobbin 9 with the first half-band 4, ie, it is first a layer LG (comprising four turns here) from wound helically above the lower end of the winding body 9, and then another layer LG radially helically wound over this layer from the lower end to the upper end. Subsequently, two double layers DL are wound with the second half-band 5, and finally a double layer DL with half-band 4. Thus, a sub-step sequence b1) -b2) -b1) is applied. The sequence of (here eight in all) layers LG from the inside to the outside in a scheme N / 2N / N (where N: number of wound layers LG in a sub-step, also called the basis layer number, here with N = 2, the slash «/» separates the sub-steps) causes an equal consumption of first and second half-band 4, 5 with approximate consideration of the increase in circumference with increasing winding radius. In Fig. 5a, for example, the winding radius WR (measured from the winding body axis WA off) of the radially outermost layer LG is located. The scheme can also be noted individually for the positions LG, here approximately as EEZZZZEE (with E: position of the first half-band, Z: position of the second half-band).
    It is also possible to apply the layer sequence N / 2N / N several times in succession (or to each other), as the magnetic coil arrangement 21 in Fig. 5b shows, where this layer sequence was applied twice (each with N = 2) to each other. Note that N can also be chosen differently in different layer sequences.
    In the magnet coil arrangements 20, 21 according to FIGS. 5a and 5b, layers LG of the first and second half bands 4, 5 are wound radially one above the other according to the invention.
    In the magnet coil assembly 22 of Fig. 5c was wound in blocks. Four double layers of the first half-band 4 (each comprising three turns) were here wound over a first section TA1 corresponding to half the length L of the winding body 9. Furthermore, four double layers of the second half band 5 (also each comprising three windings) over a further portion TA2 corresponding to the remaining half length of the winding body 9 were wound. This magnet coil arrangement 22 can be wound with a sub-step sequence b1) -b2), ie with only one change of the active coil (on the occasion of which the section to be wound is also exchanged); Alternatively, several changes are possible, for example, respectively after winding a layer or double layer of a half-band 4, 5.
    Finally, Fig. 5d shows a magnet coil assembly 23 wound as a double pancake coil (i.e., without a helical gear). The two flat coil parts of the first half-band 4 and the second half-band 5, which are wound on the same winding body 9, are typically manufactured with only one change of the active coil.
    Fig. 6 shows diagrammatically the end face of a wound coil solenoid type magnet coil assembly 24 in which layers of the first and second half bands 4, 5 are wound radially over each other, including connecting portions. In the radially innermost winding package (which is directly seated on the winding body 9), the first half-band 4 is entangled, in the next outer winding packet second half-band 5, in the next outer winding packet, in turn, first half-band 4, and in the radially outermost winding packet, finally, second half-band 5. The layer sequence ( from inside to outside) is N / N / N / N, which results in a relatively simple sequence of links. The connecting sections (between the respective next winding packages, from the same half-band, or at the end regions) are shown in bold for better recognition.
    Fig. 7 illustrates a second variant of the winding of the first half-band 4 from the first intermediate coil 14 to the winding body 9 (also referred to as a winding core) in a sub-step b1) in the context of a «synchronous rotation».
    The first intermediate coil 14 and the winding body 9 are here parallel to each other, but arranged radially spaced from each other. The second intermediate coil 15 is arranged coaxially with the winding body 9. The intermediate coils 14, 15 and the winding body 9 are aligned horizontally here.
    The second intermediate coil 15 and the winding body 9 (hereinafter also "coils 15, 9") are held on a left side in Fig. 7 bracket 16 and mechanically coupled; This holder 16 can also be used to drive a common rotation of the coils 15, 9. The first intermediate coil 14 is held by a right-side holder 17 in FIG. 7, via which a rotation synchronous with the coils 15, 9 can also be driven. All intermediate coils 14, 15 and the winding body 9 have an approximately equal circumference.
    The front end portion 2 is applied to the winding body 9 (considering a portion for play 10). For rewinding the first half-belt 4 from the first intermediate spool 14 ("active spool") to the winding body 9, the first intermediate spool 14 on the one hand and the two spools 15, 9 on the other hand in rotation (here clockwise).
    A band portion 18 (including the end portion 2 and the half-band portion for play 10) of the band-shaped conductor which connects the second (non-active) intermediate coil 15 to the winding body 9 is connected to the rotations of the coils 15, 9 simply carried, typically wherein the band portion 18 is held radially close to the two coils 15, 9. Another band portion 19 (containing the end portion 3 and the end portion 3 near half band section for game 11), which connects the two intermediate coils 14, 15, with each rotation of the first intermediate coil 14 (which also exactly one rotation of the coils 15, 9 corresponds) once led around the winding body 9 and the portion of the half-band 4 between the first intermediate coil 14 and the winding body 9. In this case, the band portion 19 passes through the winding body 9 on its right side (ie axially next to the winding body 9, on the side facing away from the second intermediate coil 15).
    When rewinding the first half-band 4 from the first intermediate coil 14 to the winding body 9, the band portions 18, 19 remain the same length; Thus, in the connections between the two intermediate coils 14, 15 or between the non-active intermediate coil 15 and the winding body 9, there is no unwinding or winding.
    For a change of the active coil, ie a change from a substep b1) to a substep b2), the first and the second intermediate coil 14,15 can exchange their place; when rewinding the second half-band 5 in sub-step b2) is then rotated counterclockwise.
    It should be noted that in later substeps b1), b2) a half-band section connecting the non-active intermediate coil and the winding body 9 generally no longer has an end region. Starting from the front end region 2, both the first half-band 4 and also the second half-band 5 have already been wound onto the winding body 9, so that this end region 2 is then firmly fixed to the winding body 9 (see also FIG. 6).
    Fig. 8 illustrates for the presented in Fig. 7 variant of winding in a sub-step b1) with rotating intermediate coil, here first intermediate coil 14, and rotating bobbin 9 ("synchronous rotation") an auxiliary construction, within the scope of the invention can be used to facilitate the process management and in particular to prevent tangling tape sections.
    On the first intermediate coil 14, a bracket 30 is rigidly fixed, which rotates upon rotation of the first intermediate coil 14 with the latter about the intermediate coil axis ZA. The band portion 19, which connects the two intermediate coils 14,15 together, with the bracket 30 (and partially within the bracket 30) entrained.
    The bracket 30 leads here from an axial end of the intermediate coil 14, which is remote from the second intermediate coil 15, initially radially away and then in the axial direction over at least the major part of the length (and preferably over the entire length or beyond ) of the winding body 9 to the second intermediate coil 15. The area swung around by the bracket 30 during one revolution of the intermediate coil 14 has a sufficiently large radius RD, so that the winding body 9 can be swung around.
    By means of the bracket 30 thus the band portion 19 is guided safely each time the first intermediate coil 14 axially laterally of the winding body 9 at its side facing away from the non-active second intermediate coil 15 side; Fig. 8 shows the bracket 30 just in such a position. Likewise, during each revolution of the first intermediate coil 14, the band portion 19 is guided by means of the bracket 30 axially laterally of the first intermediate coil 14 at the non-active second intermediate coil 15 side facing; this takes place in a position of the bracket 30 which is pivoted about 180 ° relative to the position shown in FIG. 8.
    9a to 9h illustrate the timing of a rotation of the active intermediate coil 14 on a circular path KB about the stationary winding body 9 in the context of the first method variant based on "planetary winding" (see FIG a schematic, frontal view. Band section 13b connects the two intermediate coils 14, 15.
    The half-band 4 is unwound by the movement of the intermediate coil 14 on the circular path KB of the intermediate coil 14 and wound on the winding body 9; the second intermediate coil 15 and the winding body 9 rest. In Fig. 9b it can be seen how the band portion 13b axially past the winding body 9.
    10a to 10h further illustrate the timing of a rotation of the active intermediate coil 14 on the circular path KB about the stationary winding body 9 in the sub-variant of the first variant of the method (see Fig. 3b, again seen from below). The non-active intermediate coil 15 is disposed behind the winding body 9 and therefore hidden in the figures.
    The end portion 3 is guided here with a bracket 30, which is attached to the active coil 14. The position of the end region 3 corresponds, in the radial direction, approximately to the position of the knee (Bzz 26 of FIG. to the circular path KB2.
    In the transition from Fig. 10h to Fig. 10a and Fig. 10b it can be seen how a part of the band portion 13b, namely in the region of the bracket 30, is guided past the winding body 9. The remaining band section 13b, similar to a large loop, is only narrowed and widened, but not guided over the region of the winding body 9.
    11a to 11h illustrate in a schematic, frontal view the timing of a rotation rotation of the active intermediate coil 14 in the context of a «synchronous rotation», wherein by means of a bracket 30 of the band portion 19 is guided (see Fig. 8, from seen in the front left). The band portion 19 connects the first intermediate coil 14 and the second intermediate coil 15, which is arranged behind the winding body 9 and is covered by this in Figs. 11a to 11h.
    As part of the synchronous rotation of the intermediate coil 14 and the winding body 9 half-band 4 is rewound from the intermediate coil 14 on the winding body 9 (see arrow). The bracket 30 moves in accordance with the rotation of the intermediate coil 14 with. In Fig. 11a, the band portion 19 is guided straight axially laterally past the winding body 9, and in Fig. 11h, the band portion 19 just axially laterally past the active first intermediate coil 14 (dotted behind the intermediate coil 14).
    Small Wickelradienunterschiede between the active coil and the winding body, resulting for example by the amount of already wound up or unwound half-band can be compensated in the presented winding process by a variable tightening the band section between the active coil and the winding body. It is also possible to track the radial distance between the active coil and the winding body for compensation purposes. Fig. 12 illustrates a balancing mechanism with which larger coil radii differences can be compensated; The compensation mechanism is explained using the example of «synchronous rotation».
    In the "synchronous rotation", the active intermediate coil and the winding body should be rotated synchronously. In particular, a bracket 30 for guiding a band section connecting the two intermediate coils should rotate strictly synchronously with the winding body in order to prevent knotting.
    The balancing mechanism of Fig. 12 divides the active intermediate coil into an end portion 14a and a main portion 14b. The end portion 14 a, to which also the bracket 30 is fixed, is rotated in strict synchronism with the winding body 9. The main area 14b, however, may have a slightly different rotational speed (indicated by the additional rotation φ, see arrow). The two regions 14a and 14b are connected via a belt-guiding differential gear 27, which is rotatable about a Ausgleichsradachse AA, which is perpendicular to the intermediate coil axis ZA. The compensating wheel 27 is (not shown) via a gear so articulated that it rotates about the intermediate coil axis ZA with approximately half of the rotational speed difference, ie φ / 2 (see arrow); the distance to the intermediate coil axis ZA and also the relative angular position (tilting) is fixed. At the edge of the main region 14b, a compensating flat coil 29 is provided, and at the edge of the end portion 14a, a compensating flat coil 28 is provided.
    During a winding process, half band is transferred from the main portion 14b to a former (not shown). Due to the larger winding radius of the initially still full intermediate bobbin in comparison to the still empty bobbin, the main region 14b must first rotate slower than the bobbin and the end portion 14a. As a result, half band is transmitted from the compensation flat coil 29 via the balance gear 27 to the compensation flat coil 28. From about the middle of the winding process, when the winding radius on the winding body has become the same size and then greater than the winding radius on the intermediate spool, the main region 14b must rotate faster than the winding body and the end portion 14a. Then half band is again transmitted from the Ausgleichsflachspule 28 via the balance gear 27 to the Ausgleichsflachspule 29. Finally, the entire re-transferred half-band can be wound on the winding body. During the winding process, suitable control systems or mechanisms can ensure that the desired tensile stresses in the half-band are maintained at all times.
    The half-band length, which must be kept at the beginning of the winding process on the Ausgleichsflachspule 29 substantially corresponds to the accruing over half winding process length difference, which is due to the different winding radii due to the wound heights on the intermediate coil and the winding body at the same rotational speed would result (assuming the same winding radius without tape).
    By the Ausgleichsflachspulen 28, 29 a spread of half band in the supply lines to the balance wheel 27 is avoided over the winding process.
    A corresponding mechanism can also be used in the "planetary winding", wherein the end region then does not rotate at all around itself, and the main region performs a slight rotation about itself; Main area and end area move together on a circular path around the dormant bobbin.
    LIST OF REFERENCE NUMBERS
    [0091]<tb> 1 <SEP> band-shaped conductor<tb> 2, 3 <SEP> End regions of the band-shaped conductor<tb> 4 <SEP> first half band<tb> 5 <SEP> second half band<Tb> 6 <September> storage reel<tb> 7 <SEP> twisted section<Tb> 8 <September> feed<Tb> 9 <September> bobbin<tb> 10, 11 <SEP> sections for game<tb> 12a, 12b <SEP> turns<tb> 13a, 13b <SEP> Tape sections<tb> 14 <SEP> (first) intermediate coil<tb> 14a <SEP> End portion of the intermediate coil<tb> 14b <SEP> Main area of the intermediate coil<tb> 15 <SEP> (second) intermediate coil<tb> 16, 17 <SEP> Brackets<tb> 18, 19 <SEP> Tape sections<Tb> 20-24 <September> magnetic coil assemblies<Tb> 26 <September> Knee<Tb> 27 <September> pinion<tb> 28, 29 <SEP> Compensating flat coils<Tb> 30 <September> Ironing<Tb> <September><tb> AA <SEP> Axis of the balance wheel<tb> B <SEP> Width of the half-band<Tb> DL <September> double layer<tb> GZA <SEP> common axis of the intermediate coils<Tb> KB <September> circular path<Tb> KB2 <September> circular path<tb> L <SEP> Length of the bobbin<tb> LA <SEP> Axle of bearing coil<Tb> LG <September> Location<Tb> MA <September> magnetic field axis<Tb> N <September> Location radix<tb> RD <SEP> Radius of the space swung around by the bracket<tb> TA1 <SEP> first subsection<tb> TA2 <SEP> further subsection<tb> WA <SEP> Axis of the bobbin<Tb> WR <September> winding radius<tb> ZA <SEP> Axis of the intermediate coil<Tb> φ <September> Additional rotation
    权利要求:
    Claims (20)
    [1]
    1. A method for producing a magnetic coil assembly (20-24) of a band-shaped conductor (1) which is slotted in the longitudinal direction with the exception of its two end regions (2, 3), so that the band-shaped conductor (1) has a first and a second half-band (4, 5) and two these half bands (4, 5) to a closed loop connecting end portions (2, 3),characterized by the following steps:a) the first half band (4) of the slotted band-shaped conductor (1) is wound onto a first intermediate coil (14) and the second half band (5) of the slotted band-shaped conductor (1) is wound onto a second intermediate coil (15);b) alternately sub-steps of type b1) and of type b2) are carried out, withb1) one or more windings (12a, 12b) of the first half band (4) are wound on a winding body (9) of the magnet coil arrangement (20-24) from the first intermediate coil (14), andb2) of the second intermediate coil (15) are wound on the same winding body (9) one or more windings (12a, 12b) of the second half-band (5).
    [2]
    2. The method according to claim 1, characterized in that between substeps of the type b1) and the type b2) is changed at least twice.
    [3]
    3. The method according to any one of the preceding claims, characterized in that in step a) the two half bands (4, 5) each helically with a plurality of axially adjacent turns on the intermediate coils (14, 15) are wound.
    [4]
    4. The method according to any one of the preceding claims, characterized in that in step a), the winding of the two intermediate coils (14, 15) takes place simultaneously.
    [5]
    5. The method according to any one of the preceding claims, characterized in that in step a) one of the two half bands (4, 5) connecting end regions (3) at each revolution of the intermediate coils (14, 15) between the two half bands (4, 5 ) moved through.
    [6]
    6. The method according to any one of the preceding claims, characterized in that in step b) in each case a plurality of axially adjacent turns (12a, 12b) helically wound on the winding body (9) to at least one layer (LG) in at least one substep, wherein each layer (LG) comprises a plurality of axially adjacent turns (12a, 12b).
    [7]
    7. The method according to claim 6, characterized in that in step b) in at least one sub-step of the respective intermediate coil (14, 15) one or more double layers (DL) of the half-band (4, 5) on the winding body (9) Magnet coil assembly (20-24) are wound.
    [8]
    8. The method according to claim 6 or 7, characterized in that in step b) in at least one substep one or more layers (LG) over the full axial length (L) of the winding body (9) are wound on this.
    [9]
    9. The method according to any one of claims 6 to 8, characterized in that in step b) in at least one substep b1) one or more layers (LG) only over a first portion (TA1) of the axial length (L) of the winding body (9 ) are wound on this, and that in step b) in at least one substep b2) one or more layers (LG) are wound only over a further portion (TA2) of the axial length (L) of the winding body.
    [10]
    10. The method according to any one of claims 6 to 9, characterized in that in step b) layers (LG) of the first and second half bands (4, 5) are radially superposed on the winding body (9) wound.
    [11]
    11. The method according to any one of the preceding claims, characterized in that before step a), the two half bands (4, 5) are twisted against each other in one of the end regions (3) and so twisted for winding to the intermediate coils (14, 15) are applied and in that, after step a), the intermediate coils (14, 15) are tilted relative to one another such that the twist (7) of the half bands (4, 5) at this end region (3) is canceled again.
    [12]
    12. The method according to any one of the preceding claims, characterized in that in step a) of the slotted band-shaped conductor (1) by a bearing coil (6) is unwound, on which the two half bands (4, 5) are arranged axially adjacent to each other.
    [13]
    13. The method according to any one of the preceding claims, characterized in that during step b), the intermediate coils (14, 15) and the winding body (9) are aligned substantially parallel to each other.
    [14]
    14. The method according to any one of claims 1 to 13, characterized in that in the substeps of the type b1) and b2) respectively- One of the intermediate coils (15) arranged coaxially to the winding body (9) and mechanically coupled to the winding body (9), and the other intermediate coil (14) radially spaced, but is arranged parallel to the winding body (9),- And by a rotation of the winding body (9) together with the one intermediate coil (15) and a synchronous rotation of the other intermediate coil (14) half-band (4) from the other intermediate coil (14) on the winding body (9) is wrapped- Wherein each rotation of the winding body (9) a band portion (19) which connects the two intermediate coils (14,15) together, once axially outwards on the winding body (9) past the one side of an intermediate coil (15) facing away, and once axially outside of the other intermediate coil (14) past the one of the intermediate coil (15) facing side is guided.
    [15]
    15. The method according to any one of claims 1 to 13, characterized in that in the substeps of the type b1) and b2) respectively- One of the intermediate coils (14) is guided relative to the winding body (9) on a circular path (KB) and the other intermediate coil (15) thereby remains at rest,- Wherein circulation a band portion (13b) of the conductor (1) which connects the two intermediate coils (14, 15), once axially outside the winding body (9) is passed,- And wherein each revolution, the one intermediate coil (14) once axially inside a band portion (13 a) of the conductor (1) which connects the other intermediate coil (15) and the winding body (9) is passed.
    [16]
    16. A magnet coil arrangement (20-24), produced by a method according to one of claims 1 to 15, from a band-shaped conductor (1), which is slotted in the longitudinal direction with the exception of its two end regions (2, 3), so that the band-shaped conductor (1) a first and a second half band (4, 5) and two these half bands (4, 5) to a closed loop connecting end portions (2, 3), characterized in that at least one turn (12a, 12b) of the first Half bands (4) and at least one turn (12a, 12b) of the second half-band (5) on a common winding body (9) are wound.
    [17]
    17. magnet coil arrangement (20-24) according to claim 16, characterized in that the slotted, band-shaped conductor (1) comprises a high-temperature superconducting material.
    [18]
    18. magnet coil arrangement (20-24) according to any one of claims 16 or 17, characterized in that the two half bands (4, 5) in layers (LG) helically wound on the winding body (9), wherein each layer (LG) a Variety of axially adjacent turns (12a, 12b) comprises.
    [19]
    19. Magnet coil arrangement (20-24) according to claim 18, characterized in that layers (LG) of the first and second half bands (4, 5) are wound radially one above the other onto the winding body (9).
    [20]
    20. Magnet coil arrangement (20-24) according to claim 19, characterized in that the radial sequence of layers (LG) of the first half band (4) and the second half band (5) is selected such that in the layers (LG) of the magnet coil arrangement (20-24) an approximately equal length of the first half band (4) and the second half band (5) is involved.
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    同族专利:
    公开号 | 公开日
    CH705535A2|2013-03-15|
    US8712489B2|2014-04-29|
    GB2494771B|2016-01-06|
    DE102011082652A1|2013-03-14|
    GB201216369D0|2012-10-31|
    US20130065767A1|2013-03-14|
    DE102011082652B4|2013-08-01|
    GB2494771A|2013-03-20|
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    CN111627641B|2020-06-17|2021-11-05|上海大学|Magnetic field shielding system based on multi-group special-shaped closed-loop superconducting coils|
    法律状态:
    2019-10-31| PFA| Name/firm changed|Owner name: BRUKER SWITZERLAND AG, CH Free format text: FORMER OWNER: BRUKER BIOSPIN AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011082652A|DE102011082652B4|2011-09-14|2011-09-14|Method for producing a magnet coil arrangement from a slotted strip-shaped conductor and magnet coil arrangement|
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