• 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 invention relates to a rotary electric machine (100) comprising: - a rotor (140) with permanent magnets mounted around a shaft (130); a stator (150) mounted around the rotor and provided with a body (151) and a coil (152), the coil comprising a plurality of phase inputs / outputs (162); a bearing (122) mounted at one end of the rotor and the stator and receiving the rotation shaft; and - a global connector (160) fixed on the bearing and receiving the phase inputs / outputs, said global connector comprising: at least one connection terminal (163) connected to the phase inputs / outputs (162), a plurality of power conducting tracks (165) each providing a connection between a phase input / output (162) and the connection terminal (163), and a temperature sensor (170) arranged to be in contact with one of the power conducting tracks (165) and electrically connected to the connection terminal (163).
    公开号:FR3069116A1
    申请号:FR1756733
    申请日:2017-07-17
    公开日:2019-01-18
    发明作者:Olivier Cambronne；Lilya Bouarroudj；Regis Seidenbinder
    申请人:Valeo Equipements Electriques Moteur SAS；
    IPC主号:
    专利说明:

    ROTATING ELECTRICAL MACHINE PROVIDED WITH A SENSOR
    TEMPERATURE
    TECHNICAL AREA
    The present invention relates to a rotary electrical machine equipped with a temperature sensor intended to detect the temperature of the machine. The invention finds applications in the field of rotating electrical machines for motor vehicles and, in particular, in the field of high power reversible electrical machines, which can operate in alternator mode and in engine mode, coupled with a host element such as a gearbox.
    STATE OF THE ART
    In a manner known per se, rotary electrical machines comprise a stator and a rotor secured to a shaft. The rotor can be integral with a driving and / or driven shaft and can belong to a rotating electrical machine in the form of an alternator, an electric motor, or a reversible machine capable of operating in both modes.
    The stator is mounted in a casing configured to rotate the shaft on bearings by means of bearings. The rotor comprises a body formed by a stack of sheets of metal sheets held in the form of a package by means of a suitable fixing system. The rotor has poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor.
    Furthermore, the stator comprises a body constituted by a stack of thin sheets forming a crown, the inner face of which is provided with notches open towards the inside to receive phase windings forming the winding of the stator. These windings pass through the notches in the stator body and form buns - front and rear - protruding from either side of the stator body. The phase windings are obtained for example from a continuous wire covered with enamel or from conductive elements in the form of pins connected together by welding. These windings are polyphase windings connected in star or in triangle whose inputs / outputs are connected to an electrical control module.
    During the operation of the rotating electric machine, these windings heat up to a certain temperature level. If this temperature level is too high, the rotating electric machine can be damaged. It is therefore important to know as precisely as possible the temperature of the stator windings in order, in particular, to control the machine so as to avoid any overheating.
    One solution for measuring the temperature of the windings is to insert, within the stator winding, a probe for measuring the temperature of said windings. This measurement probe is placed so as to be in contact with at least one of the wires or conductive elements forming the stator windings. For reasons of space, this measurement probe is generally placed as close as possible to one of the winding buns.
    However, if this probe makes it possible to measure the temperature of the windings, it requires specific wiring extending, outside the stator, from the stator bun to the interconnector or the control module fixed on the bearing. The fixing of the wiring on the control module, or on the interconnector, is generally carried out by means of a screw system, which makes the installation of the measuring probe laborious and relatively delicate.
    Connecting the measurement probe from outside the stator is therefore a relatively bulky solution because it requires the addition of wiring and wiring protection along the stator and a relatively precarious solution because the wiring or its fixing can be easily damaged when handling the rotating electric machine.
    SUMMARY OF THE INVENTION
    To respond to the problems mentioned above of the space requirement and the precariousness of the connection from the outside of the stator, the applicant proposes a rotary electrical machine in which the temperature sensor is installed in the interconnector or in the module control of the overall connector so as to be in contact with a power conducting track and connected, through the interconnector or the control module, to a connection terminal.
    According to a first aspect, the invention relates to a rotary electric machine comprising:
    - a permanent magnet rotor mounted around a shaft;
    - a stator mounted around the rotor and provided with a body and a winding, the winding comprising a plurality of phase inputs / outputs;
    - a bearing mounted at one end of the rotor and the stator and receiving the rotation shaft; and
    - a global connector fixed on the bearing and receiving the phase inputs / outputs, this global connector comprising:
    o at least one connection terminal connected to the phase inputs / outputs, o a plurality of power conducting tracks each providing a connection between a phase input / output and the connection terminal, and o a temperature sensor arranged so as to be in contact with one of the power conducting tracks and electrically connected to the connection terminal.
    The fact that the temperature sensor is integrated in the global connector makes it possible to produce a compact rotary electrical machine, without wiring outside the stator.
    Advantageously, the temperature sensor is in mechanical contact with the power conducting track. The sensor thus measures the temperature of the conductive track which connects a phase input / output to the connection terminal.
    The rotary electrical machine according to the invention may include one or more of the following characteristics:
    - the temperature sensor is connected to the connection terminal by a conductive signal track.
    - the signal conducting track and the power conducting tracks are encapsulated in the global connector.
    the power conducting tracks comprise phase output tracks, the temperature sensor being in contact with one of said phase output tracks.
    the power conducting tracks include phase entry tracks, the temperature sensor being in contact with one of said phase entry tracks.
    the power conducting tracks include neutral point tracks, the temperature sensor being in contact with one of said neutral point tracks.
    - the temperature sensor is housed in a cavity in the global connector and leads to a power conducting track.
    - the temperature sensor is a CTN thermistor.
    the connection terminal comprises a plurality of power conducting pads each connected to a power conducting track and at least one signal conducting pad connected to the temperature sensor.
    - the temperature sensor is placed in the vicinity of one of the power conducting pads.
    - The temperature sensor is arranged axially between a power conducting pad and one end of the power conducting track corresponding to said pad.
    BRIEF DESCRIPTION OF THE FIGURES
    Other advantages and characteristics of the invention will appear on reading the description, illustrated by the figures in which:
    - Figure 1 shows, schematically and partially, a sectional view of a rotary electrical machine according to an exemplary implementation of the invention.
    FIG. 2 represents a perspective view of the rear part of the rotary electric machine of FIG. 1.
    - Figure 3 shows a top view, in partial section, of a portion of the overall connector of the machine of Figure 2.
    - Figure 4 shows a top view of a portion of the overall connector of the machine of Figure 2.
    DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT
    An exemplary embodiment of a rotary electrical machine in which the temperature sensor is installed in the overall connector, is described in detail below, with reference to the accompanying drawings. This example illustrates the characteristics and advantages of the invention. It is however recalled that the invention is not limited to this example.
    In the figures, identical elements are identified by identical references. For reasons of readability of the figures, the size scales between the elements represented are not respected.
    FIG. 1 represents a compact and polyphase rotary electrical machine 100, in particular for a motor vehicle. This rotating electrical machine 100 transforms mechanical energy into electrical energy, in alternator mode, and transforms electrical energy into mechanical energy, in motor mode. This rotary electrical machine 100 is, for example, an alternator starter or a reversible machine.
    In known manner, a rotary electrical machine 100 comprises a housing 120, crossed by a shaft 130 extending along the axis X. Inside the housing 120, are mounted a rotor 140 and a stator 150. The rotor 140 is secured to the shaft 130 and the stator 150 is secured to the housing 120.
    In the example of FIG. 1, the casing 120 comprises two bearings 121, 122 each mounted at one end of said casing to support and guide the shaft 130. The bearings are secured to each other. The front bearing 121 and the rear bearing 122 each carry, centrally, a ball bearing for the rotational mounting of the shaft 130.
    In this exemplary embodiment, the stator 150 comprises a body 151 formed from a pack of sheets provided with notches receiving phase windings 152 which form the winding of the stator. These phase windings 152 pass through the notches of the stator body and form, on either side of said stator body 151, a front bun (not visible in the figure) and a rear bun 153. These windings 152 are polyphase windings connected in star or triangle and whose inputs / outputs are connected to a global connector 160. This global connector 160 comprises:
    - a component, called an interconnector, which comprises connection tracks connecting the inputs / outputs of the phase windings of the stator 150 to an inverter; and
    - an electrical circuit, called a control module, which provides an electrical connection between the incoming / outgoing signal from the rotating machine and the incoming / outgoing signal from the inverter.
    FIG. 2 represents a perspective view of a portion of the rotary electric machine 100 according to certain embodiments of the invention. FIG. 2 represents, in particular, the rear part of the machine 100 with the rear bearing 122 and the overall connector 160. The rear bearing 122 covers the rear axial ends of the rotor 140 and the stator 150 and supports the overall connector 160.
    As shown in FIG. 2, the global connector 160 comprises two input / output blocks 161a, 161b of the phase windings, each block comprising three inputs / outputs of the phase windings. These inputs / outputs of the phase windings are more simply called phase inputs / outputs and are referenced 162. The phase inputs / outputs 162 can be phase inputs by which the stator windings are electrically supplied or outputs of phases by which the power generated by the windings is collected. The phase inputs / outputs 162 can also be neutral points, in particular in the case of a star phase connection.
    Those skilled in the art will understand that a rotary electrical machine operating in single three-phase comprises a single block of inputs / outputs, that a rotary electrical machine operating in double three-phase - as in the example of FIG. 2 - comprises two blocks inputs / outputs, that a rotary electrical machine operating in three-phase comprises three blocks of inputs / outputs, etc. Each input / output 162 of the input / output blocks 161a, 161b is connected to a power conducting pad 164 of a connection terminal 163. The connection terminal 163 transmits to an electronic card (not shown in the figures ) of the circuit for controlling the power signals originating from or intended for the stator windings, via an additional connector connected to the electronic card.
    A partial sectional view of a portion of the global connector 160 is shown in FIG. 3. This representation shows the input / output block 161a with its three phase inputs / outputs 162a, 162b, 162c and power conducting tracks. 165a, 165b, 165c connecting, respectively, each of the phase inputs / outputs 162a, 162b, 162c to a power conducting pad 164a, 164b, 164c. Symmetrically, but not shown in FIG. 3, three power conducting tracks connect the three phase inputs / outputs of the input / output block 161b to, respectively, three other pads of the connection terminal 163. The terminal connection 163 is thus able to transmit, to the electronic card, the power signal from each of the phase windings of the stator 150.
    The power conducting tracks 165 can be phase input tracks, or phase output tracks or even neutral point tracks.
    According to the invention, the global connector 160 comprises a temperature sensor 170 arranged so as to be in physical contact with one of the power conducting tracks 165a, 165b, 165c. The temperature sensor can be installed in the interconnector or in the control module of the global connector 160. In particular, the temperature sensor 170, for example a CTN thermistor, can be placed on one of the power conducting tracks so as to measure, by mechanical contact with said track, the temperature of this power conducting track. The temperature sensor 170 can be fixed, for example by gluing, on one of the power conducting tracks 165a, 165b, 165c of the global connector 160. As shown in FIG. 4, the temperature sensor 170 can also be deposited in a cavity through 171, formed in the substrate 167 of the global connector 160, above the power conductive track 165. A layer of encapsulation resin can cover the assembly (sensor and conductive tracks) in order to fix the sensor on the track power conductor. Whatever the fixing technique, the temperature sensor 170 is pressed against the power conducting track 165 in order to ensure an accurate measurement of its temperature.
    Thus positioned in contact with a power conducting track, the temperature sensor 170 measures the temperature of the power conducting track. A mathematical law, known to those skilled in the art, makes it possible to calculate the temperature of the bun from the measured temperature of the power conducting track.
    This mathematical law includes a known mathematical formula which, on the basis of the predefined parameters of the rotary electric machine (for example, its charge and its speed) and the temperature measured on the power conducting track, makes it possible to evaluate the temperature of the windings phase.
    The temperature of the phase windings can be calculated by the electronic card of the global connector 160. For this, the temperature sensor 170 is electrically connected to a signal conductive pad 166 inserted, with the power conductive pads 164, in the connection terminal 163. The connection terminal 163 thus comprises six power conductive pads 164 and a signal conductive pad 166. The connection terminal 163, designed to receive an additional connector connected to the electronic card, thus not only transmits power data but also temperature data measured on the electronic card.
    This electrical connection between the temperature sensor 170 and the signal conducting pad 166 can be implemented by means of an additional conducting track 172, called the signal conducting track. The power conductive tracks 165 and the signal conductive track 172 are conductive tracks, for example made of copper, etched and encapsulated in a substrate forming the support of the global connector 160. These power and 165 conductive tracks and signal 172 called "leadframe In English terms - can be etched on different stages of the substrate so that the signal conducting track 172 is not in contact with any of the power conducting tracks 165.
    According to certain embodiments, the temperature sensor 170 is positioned at the hottest location of the power conducting track, that is to say in the vicinity of one of the power conducting pads 164. According to a variant, the sensor temperature 170 is disposed axially between one of the power conducting pads 164 and one end of the power conducting track 165 corresponding to said pad. For example, the temperature sensor 170 is arranged between the power conducting track 165a and the power conducting pad 164a of the connection terminal 163.
    In the rotary electrical machine described above, the temperature of the phase windings is determined, not by direct measurement of the temperature of the bun, but by measurement of the temperature of one of the power conducting tracks and calculation of compensation between track temperature and winding temperature. Measuring the temperature of the power conductor track makes it possible to integrate the temperature sensor 170 directly into the global connector 160, so that a short conductive track is sufficient to connect it to the connection terminal 163 and that no additional wiring outside the stator is not necessary. The implantation of the temperature sensor 170 in the global connector also allows it to be put in place when the said global connector is manufactured, which avoids an installation and fixing operation (for example 10 by screws). wiring. The assembly process of the parts forming the rotating electric machine is thus facilitated.
    Although described through a certain number of examples, variants and embodiments, the rotary electric machine according to the invention comprises various variants, modifications and improvements which will be obvious to a person skilled in the art, it being understood that these variants, modifications and improvements are part of the scope of the invention.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Rotating electric machine (100) comprising:
    - a rotor (140) with permanent magnets mounted around a shaft (130);
    - A stator (150) mounted around the rotor and provided with a body (151) and a winding (152), the winding comprising a plurality of phase inputs / outputs (162);
    - a bearing (122) mounted at one end of the rotor and the stator and receiving the shaft; and
    - a global connector (160) fixed on the bearing and receiving the phase inputs / outputs, said global connector comprising:
    o at least one connection terminal (163) connected to the phase inputs / outputs (162), o a plurality of power conducting tracks (165) each providing a connection between a phase input / output (162) and the terminal connection (163), and o a temperature sensor (170) arranged so as to be in contact with one of the power conducting tracks (165) and electrically connected to the connection terminal (163).
    [2" id="c-fr-0002]
    2. Rotating electric machine according to claim 1, characterized in that the temperature sensor (170) is in mechanical contact with the power conducting track (165).
    [3" id="c-fr-0003]
    3. Rotating electric machine according to claim 1 or 2, characterized in that the temperature sensor (170) is connected to the connection terminal (163) by a signal conducting track (172).
    [4" id="c-fr-0004]
    4. Rotating electric machine according to claim 3, characterized in that the signal conducting track (172) and the power conducting tracks (165) are encapsulated in the global connector (160).
    [5" id="c-fr-0005]
    5. rotary electric machine according to any one of claims 1 to 4, characterized in that the power conducting tracks (165) comprise phase output tracks, the temperature sensor (170) being in contact with one of said tracks phase output.
    [6" id="c-fr-0006]
    6. rotary electrical machine according to any one of claims 1 to 4, characterized in that the power conducting tracks (165) comprise phase input tracks, the temperature sensor (170) being in contact with one of said phase entry tracks.
    [7" id="c-fr-0007]
    7. rotary electric machine according to any one of claims 1 to 4, characterized in that the power conducting tracks (165) comprise neutral point tracks, the temperature sensor (170) being in contact with one of said tracks neutral point.
    [8" id="c-fr-0008]
    8. Rotating electric machine according to any one of claims 1 to 7, characterized in that the temperature sensor (170) is housed in a cavity (171) formed in the global connector and opening onto a power conducting track.
    [9" id="c-fr-0009]
    9. Rotating electric machine according to any one of claims 1 to 8, characterized in that the temperature sensor (170) is a NTC thermistor.
    [10" id="c-fr-0010]
    10. Rotating electric machine according to any one of claims 1 to 9, characterized in that the connection terminal (163) comprises a plurality of power conducting pads (164) each connected to a power conducting track (165) and at least one signal conducting pad (166) connected to the temperature sensor (170).
    [11" id="c-fr-0011]
    11. Rotating electric machine according to claim 10, characterized in that the temperature sensor (170) is arranged in the vicinity of one of the power conducting pads (164).
    [12" id="c-fr-0012]
    12. Rotating electric machine according to claim 10 or 11, characterized in that the temperature sensor (170) is arranged axially between a power conductor pad (164) and one end of the power conductor track (165) corresponding to said pad .
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3069116A1|2019-01-18|ROTATING ELECTRIC MACHINE WITH TEMPERATURE SENSOR
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    FR2930380A1|2009-10-23|DEVICE FORMING ELECTRIC MOTOR FOR POWER STEERING AND POWER STEERING DEVICE
    EP0743738A1|1996-11-20|Alternator, in particular for motor vehicle comprising an improved arrangement of rectifying diodes
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    EP3047561A2|2016-07-27|Polyphase electric motor provided with a device for determining the angular position and/or the speed of rotation of a rotor of said motor
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    同族专利:
    公开号 | 公开日
    FR3069116B1|2020-01-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1220422A1|2000-12-27|2002-07-03|Ebm Werke GmbH & Co.KG|Electric motor, in particular outer rotor motor|
    JP2008131775A|2006-11-22|2008-06-05|Denso Corp|Stator of rotary electric machine|
    DE202007007391U1|2007-05-24|2008-10-02|Ebm-Papst Mulfingen Gmbh & Co. Kg|Stator for an electric motor|
    US20130270971A1|2012-04-13|2013-10-17|Globe Motors, Inc.|Method of positioning a sensor within a motor assembly|
    US20160111935A1|2013-06-05|2016-04-21|Valeo Equipements Electriques Moteur|Electrical machine provided with a damper in order to resist vibratory stresses mechanically, and corresponding damper|WO2020216402A1|2019-04-26|2020-10-29|Schaeffler Technologies AG & Co. KG|Electric machine|
    WO2020216401A1|2019-04-26|2020-10-29|Schaeffler Technologies AG & Co. KG|Electric machine|
    WO2020260715A1|2019-06-27|2020-12-30|Valeo Equipements Electriques Moteur|Plastic bearing for a rotating electric machine|
    WO2021014067A1|2019-07-22|2021-01-28|Nidec Psa Emotors|Electric machine provided with a temperature sensor|
    法律状态:
    2019-01-18| PLSC| Search report ready|Effective date: 20190118 |
    2019-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 4 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1756733A|FR3069116B1|2017-07-17|2017-07-17|ROTATING ELECTRIC MACHINE PROVIDED WITH A TEMPERATURE SENSOR|
    FR1756733|2017-07-17|FR1756733A| FR3069116B1|2017-07-17|2017-07-17|ROTATING ELECTRIC MACHINE PROVIDED WITH A TEMPERATURE SENSOR|
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