• 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:
    The generator has commutator section (B) and a generator section (A) with a rotor (R) and a stator (S). The rotor (R) is of lesser axial extent than the stator (S). …<??>A magntic shield (15) is provided between generator section (A) and the commutator section (B).
    公开号:SU1279546A3
    申请号:SU802954166
    申请日:1980-07-18
    公开日:1986-12-23
    发明作者:Кохцаи Есинори；Амемимуа Еиси；Фуеока Есики；Иваматсу Нобору
    申请人:Фудзицу Фанук Лимитед (Фирма)；
    IPC主号:
    专利说明:

    elements are made in the form of sensors and to improve the accuracy of the transformed Hall. In this tachogenerator, the study of the rotation frequency affects the influence of the flow end and the screen isolates the SG relative to the SG and DPR in the magnetic sections of the main winding coils, which allows it to be closer to shaft and reduce the ripple output sig1279546
    axial dimensions. 6 Il.
    权利要求:
    Claims (1)
    [1]
    The invention relates to electrical engineering, namely, brushless tachogenerators. The aim of the invention is to improve the accuracy of converting rotational frequency to voltage and reduce the axial dimensions of the tachogenerator. FIG. 1 shows a schematic representation of the construction of a synchronous generator; in fig. 2 - synchronous generator stator, perspective view; in fig. 3 - the core winding coil of a synchronous generator, a simplified perspective view; on Fig.4generator, axial section; in fig. 5 is a circuit diagram of the proposed tachogenerator; in fig. 6 shows the output waveforms from the core windings of a synchronous generator. The tachogenerator contains a synchronous generator connected directly through shaft 1 or through a transmission mechanism with an asynchronous motor (not shown), the speed of which must be determined. On shaft 1, a first permanent magnet 2 is mounted, having pole pieces 3 and 4, a first permanent magnet 2 and pole pieces 3 and 4 form a rotor of a synchronous generator. The stator 5 of the synchronous generator is located outside the rotor, has a cylindrical shape and can be made with. using a layered structure of silicon steel plates that are cut in the form of round discs. On the inner surface of the stator of the generator, for example, four coils of 6-9 root windings are fixed, which are displaced. in this case is 90 °. The tachometer also contains a rotor position sensor in the form of a second permanent magnet 10 mounted on shaft 1, with pole pieces 1 and. 12 and evenly arranged around the circumference outside the second permanent magnet 10 on the fixed plate 13 sensitive elements (Hall sensors) 14. A screen 15 in the form of a plate of magnetic material is mounted on the shaft by a synchronous generator and a rotor position sensor at an equal distance from both switches 16, buffer amplifier 17, and inverters 18 corresponding to each of the electronic switches 16. I The tachogenerator works as follows. When the shaft 1 of the coil 6-9 rotates, the crust windings of the synchronous generator generate alternating voltages that are 90 ° out of phase with each other. FIG. 6 shows the waveforms of voltages generated at the terminals of coils 6-9. The frequency and peak values of the generated voltages are proportional to the hour of rotation of the shaft 1. The second constant magnet 10 drives each of the sensitive elements (Hall sensors) 14, each of which sends a signal to the corresponding electronic switch 16. Accordingly, the electronic switches 16 are closed successively when receiving signals, whereby one switch closes each time the rotating shaft turns 90 ° C. When each of the electronic switches 16 is closed to the input buffer the amplifier 17 is energized by the corresponding coil of the synchronous alternator core winding. Thus, the buffer amplifier 17 will provide an output signal at its output in the form of an analog DC signal serving as a signal for determining the speed, the value of which is proportional to the frequency of rotation of shaft 1. In accordance with the invention, the synchronous generator rotor has a width smaller than stator 5 in the axial direction and is 0.8 of its magnitude. This causes the stator flow to intersect the core winding coils without any influence from the flow side of the end sections of these coils, which protrude from the sides of the stator pole 5. As a result, the output windings of the core windings have the same shape so that the rotational speed detection signal from the buffer amplifier has an extremely small component of the pulsadia, as a result of which the accuracy of converting the rotational frequency to voltage is deteriorated. In addition, the magnetic shield 15, installed between the synchronous generator and the rotor position sensor, shields the magnetic flux of the first one and prevents the current from reaching the second one. In this connection, the synchronous generator and the rotor position sensor can be located closer to each other in the axial direction, allowing a reduction in the longitudinal 464 (axial) dimensions of the device to a great extent. Claims The tachogenerator contains a synchronous generator, the rotor of which is made in the form of the first permanent magnet placed on the shaft, and the stator is a cylindrical element mounted outside the rotor, with n uniformly placed coils of the synchronous generator core winding, where made in the form of a second permanent magnet mounted on a common shaft with a first permanent magnet, n sensitive elements, evenly placed around the circumference of the position sensor p tori, where, and electronic switches, the power circuit of each of which is connected between the output terminal of the coil of one of the phases of the synchronous generator's core winding and the output circuit of the tachogenerator, and the control input is connected to one of the sensing elements, the accuracy of converting the rotational frequency to voltage and reducing axial dimensions; the tachogenerator is equipped with a screen made in the form of a plate of magnetic material mounted on the shaft at an equal distance from the synchronous for generators and rotor position sensor, wherein the width of the synchronous generator rotor in the axial direction is 0.8 its width in the axial direction of the stator, and the sensitive elements are Hall vvdedatchikov.
     eleven
    1 I
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP0023123B1|1984-10-10|
    US4364005A|1982-12-14|
    JPS5617887U|1981-02-17|
    DE3069417D1|1984-11-15|
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    引用文献:
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    US4088943A|1977-02-25|1978-05-09|Electro-Craft Corporation|Brushless DC tachometer circuit|WO1984000422A1|1982-07-06|1984-02-02|Kenneth S Kordik|An improved magnetic rotational velocity sensor|
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    EP0128519B1|1983-06-14|1991-11-21|Kollmorgen Corporation|Brushless tachometer|
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    US5418416A|1983-09-05|1995-05-23|Papst Licensing Gmbh|Brushless three-phase DC motor|
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    JP3124678B2|1994-03-16|2001-01-15|アルプス電気株式会社|motor|
    US5461270A|1994-05-11|1995-10-24|E. M. W. Groschopp, Inc.|Attachment device for speed sensor in a motor|
    EP0733907A1|1995-03-21|1996-09-25|Oerlikon Contraves AG|Apparatus for measuring the muzzle-velocity of a projectile on rapid fire guns|
    GB2305022B|1995-09-05|2000-04-26|Switched Reluctance Drives Ltd|Starting a single-phase reluctance motor|
    US5717268A|1996-06-17|1998-02-10|Philips Electronics North America Corp.|Electric motor with tachometer signal generator|
    JP3740984B2|2000-02-10|2006-02-01|日産自動車株式会社|Electric pole position detector|
    DE10130130B4|2001-06-22|2007-09-20|Minebea Co., Ltd.|Device for generating a speed-dependent signal for an electric motor, in particular for an electronically commutated DC motor|
    JP4516281B2|2003-04-02|2010-08-04|本田技研工業株式会社|Torque sensor|
    US7081696B2|2004-08-12|2006-07-25|Exro Technologies Inc.|Polyphasic multi-coil generator|
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    DE102005047451A1|2005-09-30|2007-04-12|Siemens Ag|synchronous machine|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP9961879U|JPS5617887U|1979-07-19|1979-07-19|
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