JP4341402B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine including a rotor magnetic pole position detecting means.

  A conventional rotating electrical machine uses a resolver and an encoder as magnetic pole position detection means as described in Patent Document 1 and Patent Document 2, for example. In addition, as described in Patent Document 3, for example, a conventional rotating electrical machine has, as a magnetic pole position detection means, N pole and S pole, N pole and neutral, or S pole and neutral in the circumferential direction. Some of them are composed of permanent magnets provided at one end in the axial direction of the rotor and Hall elements provided at portions facing the permanent magnets so as to alternate.

JP 2002-21687 A JP 2001-231218 A JP 2000-46513 A

  Recently, it has been studied to mount a rotating electric machine having a Rundel type rotor on an automobile and use it as an AC synchronous motor. In this case, since the rotating electrical machine is driven by the inverter device, it is necessary to detect the magnetic pole position of the rotor. However, a rotating electrical machine having a Rundel type rotor has been mounted on an automobile and used as a generator so far, and has not required detection of the magnetic pole position of the rotor. For this reason, the rotating electrical machine was not provided with a magnetic pole position detection means in the first place. For this reason, when a rotating electrical machine having a Rundel type rotor is mounted on an automobile and used as an AC synchronous motor, it is necessary to newly add a magnetic pole position detecting means to the rotating electrical machine.

  As the magnetic pole position detection means, it is conceivable to use one described in any of Patent Documents 1-3. The resolver described in Patent Document 1 or the encoder described in Patent Document 2 is provided at the end of the rotating shaft. However, in a rotating electrical machine having a Rundel-type rotor, a connecting portion with a pulley or other equipment is provided at one end of the rotating shaft, and slip that receives supply of excitation current supplied to the rotor winding via a brush A ring is provided at the other end of the rotating shaft. For this reason, when a resolver or an encoder is attached to the rotating electrical machine, the rotating shaft must be further lengthened. Thereby, since the axial length of the rotating electrical machine is increased, the rotating electrical machine is increased in size and the rotating electrical machine becomes expensive. Further, since the resolver and the encoder themselves are also expensive, the rotating electric machine is further expensive.

  On the other hand, in the magnetic pole position detection means described in Patent Document 3, the permanent magnets constituting the magnetic pole position detection means are provided at the side end on one side in the axial direction of the rotor core. However, in a rotating electrical machine having a Rundel-type rotor, the space between the end on one side of the rotor core in the axial direction and the front bracket and the end on the other side in the axial direction of the rotor core and the rear plate are used. When the permanent magnet is attached to the axial end of the rotor core, the space width between the axial end of the rotor core and the front bracket and the axis of the rotor core The space width between the end portion on the other side in the direction and the rear plate needs to be larger than that in the past. Further, in a rotating electrical machine having a Rundel type rotor, when the inside is cooled by outside air, fans for circulating outside air are provided at both end portions in the axial direction of the rotor core. For this reason, in the rotating electrical machine, it is difficult to provide a permanent magnet for detecting the magnetic pole position at the side end on one side in the axial direction of the rotor core.

  The present invention is provided with magnetic pole position detection means that is less expensive than off-the-shelf magnetic pole position detection means such as a resolver and an encoder without greatly changing the structure of the Rundel type rotor and without increasing the size of the rotating electrical machine. Provide rotating electrical machines.

  In order to obtain the above rotating electric machine, the present invention uses a part of the structure of the Rundel type rotor and a part that does not easily affect the existing structure and design dimensions, and detects the magnetic pole position of the rotor there. A magnetic member constituting the body is provided, and a means for detecting magnetism of the magnetic member is provided at a portion facing the magnetic member. Specifically, a magnetic member is provided on the outer periphery of the holding member that holds the slip ring on the rotation shaft, and means for detecting the magnetism of the magnetic member is provided at a portion facing the magnetic member. Alternatively, between the magnetic poles of the plurality of claw-shaped magnetic poles arranged so that the polarities are alternately different in the rotation direction, a magnetic member that protrudes outward in the axial direction from the one axial end of the iron core is provided. Means for detecting magnetism is provided at a portion facing the magnetic member. Alternatively, a magnetic member is provided on the outer periphery of a disc provided on a part of the rotating shaft and on the opposite side of the slip ring from the iron core, and means for detecting the magnetism of the magnetic member is provided as a magnet. It is provided at a portion facing the member.

  According to the present invention, the magnetic pole position detection means of the Rundel type rotor is constituted by the combination of the magnetic member and the magnetic detection means, and is provided as described above, so that the structure and design dimensions of the existing rotating electrical machine are not changed. By simply adding the magnetic member and the magnetic detection means to the above part, the magnetic pole position detection means can be easily provided in the rotating electrical machine. In addition, according to the present invention, the magnetic pole position detection means of the Rundel type rotor is constituted by a combination of a magnetic member and a magnetic detection means, so that each of the magnetic member and the magnetic detection means is an inexpensive member or an inexpensive electronic device. It can be configured using parts.

  According to the present invention described above, the magnetic pole position detecting means can be easily provided in the rotating electrical machine by simply adding the magnetic member and the magnetic detecting means to the above-mentioned part without changing the structure and design dimensions of the existing rotating electrical machine. Therefore, the magnetic pole position detecting means can be provided in the rotating electric machine without greatly changing the structure of the Rundel-type rotor and without increasing the size of the rotating electric machine, and each of the magnetic member and the magnetic detecting means. Can be constructed using inexpensive members and inexpensive electronic components, and therefore, the rotary electric machine can be provided with a magnetic pole position detection means that is less expensive than a ready-made magnetic pole position detection means such as a resolver or an encoder. Therefore, according to the present invention, it is possible to provide a rotating electrical machine having a Rundel type rotor having a magnetic pole position detecting means at a small size and at a low price.

  Representative best embodiments of the present invention are listed below.

  The rotor includes a stator and a rotor rotatably provided through a gap. The rotor includes a rotating shaft rotatably supported by a bearing, an iron core provided thereon, and a holding member. The iron core has a plurality of claw-shaped magnetic poles arranged so that the polarities are alternately different in the rotation direction of the rotor, and the slip ring is rotated. It is electrically connected to the windings mounted on the iron core of the child and receives the excitation current supplied to the windings from the brush. The magnetic pole position of the rotor is detected on the outer periphery of the holding member. A rotating electrical machine in which a magnetic member that constitutes an object to be detected is provided, and a detection means for detecting magnetism of the magnetic member is provided at a portion facing the magnetic member.

  The rotor includes a stator and a rotor that is rotatably provided through a gap. The rotor includes a rotating shaft that is rotatably supported by a bearing, and an iron core provided thereon. The iron core includes a plurality of claw-shaped magnetic poles arranged so that the polarities are alternately different in the rotation direction of the rotor, and a magnetic member that constitutes a detection object for detecting the magnetic pole position of the rotor, The magnetic member is held between the claw-shaped magnetic poles, and one side of the end portion protrudes axially outward from one side of the axial end portion of the iron core and faces the protruding end of the magnetic member The rotary electric machine is provided with means for detecting the magnetism of the magnetic member.

  The rotor includes a stator and a rotor that is rotatably provided through a gap. The rotor includes a rotary shaft that is rotatably supported by a bearing, an iron core provided on the rotary shaft, and a rotary shaft. The iron core is provided with a plurality of claw-shaped magnetic poles arranged in such a manner that the polarities are alternately different in the rotation direction of the rotor, and is a part on the rotation axis; A disk is provided on the side opposite to the slip ring side with respect to the iron core, and a magnetic member constituting a detection object for detecting the magnetic pole position of the rotor is provided on the outer periphery of the disk. A rotating electric machine is provided with means for detecting the magnetism of the magnetic member at a portion facing the magnetic member.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the overall configuration of the motor generator of this embodiment. FIG. 2 shows a schematic configuration of an automobile powertrain system to which an electric powertrain system to which the motor generator of this embodiment is applied is applied.

  First, the schematic configuration of the automobile powertrain shown in FIG. 2 will be described. The vehicle shown in FIG. 2 is one of hybrid electric vehicles including both an engine power train that uses an engine 110 that is an internal combustion engine as a power source and an electric power train that uses a motor generator 120 as a power source. The engine power train mainly constitutes the driving source of the automobile. The electric power train is mainly used as a starting source for the engine 110, an assist source for the engine 110, and a power source for the automobile. Therefore, in the automobile shown in FIG. 2, the ignition key switch is in the on state, so that the engine 110 can be stopped when the vehicle stops, such as waiting for a signal, and the engine 110 can be restarted when leaving the vehicle.

  In the automobile shown in FIG. 2, reference numeral 100 denotes a vehicle body. A front wheel axle 101 is rotatably supported on the front portion of the vehicle body 100. Front wheels 102 and 103 are provided at both ends of the front wheel axle 101. A rear wheel axle 104 is rotatably supported on the rear portion of the vehicle body 100. Rear wheels 105 and 106 are provided at both ends of the rear wheel axle 104. The automobile shown in FIG. 2 employs a front wheel drive system. Therefore, a differential gear 111 (hereinafter abbreviated as “DEF111”), which is a power distribution mechanism, is provided in the central portion of the front wheel axle 101, and the rotational driving force transmitted from the engine 110 via the transmission 112 is provided. Is distributed to the left and right front wheel axles 101. The transmission 112 changes the rotational driving force of the engine 110 and transmits it to the DEF 111.

  A motor generator 120 is mechanically connected to the engine 110. Thus, the rotational driving force of the motor generator 120 can be transmitted to the engine 110, and the rotational driving force of the engine 110 can be transmitted to the motor generator 120, respectively. In the automobile shown in FIG. 2, a mechanical connection between the pulley 110 a provided on the crankshaft of the engine 110 and the pulley 120 a provided on the rotation shaft of the motor generator 120 is mechanically connected by the belt 130. The motor generator 120 is mechanically coupled.

In motor generator 120, when the three-phase AC power controlled by inverter device 121 is supplied to the stator coil of the stator, the rotor rotates, and a rotational driving force corresponding to the three-phase AC power is generated. That is, motor generator 120 is controlled from inverter device 121 and operates as an electric motor. On the other hand, motor generator 120 receives the rotational driving force of engine 110 and rotates the rotor, so that an electromotive force is induced in the stator coil of the stator and three-phase AC power is generated. That is, motor generator 120 operates as a generator.

  Inverter device 121 is a power conversion device that converts DC power supplied from high-voltage battery 122 into three-phase AC power, and includes an operation command value, a three-phase AC current value flowing through the stator coil of motor generator 120, and a magnetic pole position of the rotor. A command signal corresponding to the input signal is calculated, a drive signal is generated from the command signal, and the power conversion semiconductor element constituting the inverter bridge circuit is driven (on / off) based on the drive signal. It has become. A MOSFET (metal oxide semiconductor field effect transistor) is used as a semiconductor element for power conversion. An IGBT (insulated gate bipolar transistor) can be used in place of the MOSFET. In addition, since MOSFET has a diode inside, it can be comprised by 1 chip | tip.

  The high-voltage battery 122 constitutes the high-voltage (42v) system power supply of the automobile shown in FIG. 2, and is an injector (fuel injection valve) that controls the power supply for driving the motor generator 120 and the amount of fuel supplied to the engine 110. ) Actuator power source and slot valve (throttle valve) actuator power source for controlling the amount of air supplied to the engine 110. The high-voltage battery 122 is supplied with three-phase AC power generated by the motor generator 120 after being converted into DC power by the inverter device 121. The high voltage battery 122 charges the converted DC power. As the high voltage battery 122, a lithium ion battery having a battery voltage of 36v is used.

The high voltage battery 122 is electrically connected to the low voltage battery 123 via a DC-DC converter 124. The low voltage battery 123 constitutes a low voltage (14v) power source of the automobile shown in FIG. 2, and is used as a power source for a starter 125, a radio, a light, etc. for starting the engine 110. Direct current power from the high voltage battery 122 is stepped down by the DC-DC converter 124 and supplied to the low voltage battery 123. The low voltage battery 123 charges the stepped down DC power. Further, the DC power of the low voltage battery 123 can be boosted using the DC-DC converter 124 and supplied to the high voltage battery 122 to be used as the high voltage battery 122. As the low voltage battery 123, a lead battery having a battery voltage of 12v is used.

  The automobile shown in FIG. 2 has a plurality of operation modes, and the drive of the electric power train is controlled according to each operation mode. When the engine 110 is in the initial start mode, that is, when the engine 110 is cold, the ignition key switch is turned on to start the engine 110, that is, when the engine 110 is cold started, DC power is supplied from the low voltage battery 123 to the starter 125. Then start 125 is driven. Thereby, the engine 110 is started.

  When the engine 110 is in the restart mode (idle stop mode), that is, when the engine 110 is warm and the ignition key switch is on, the engine 110 is stopped when the vehicle stops, such as waiting for a signal, and the engine 110 is When restarting (hot starting), the DC power of the high voltage battery 122 is converted into AC power by the inverter device 121 and supplied to the motor generator 120 to drive the motor generator 120, and the rotational driving force of the motor generator 120 is converted to the engine 110. To communicate. Thereby, the engine 110 is restarted. In the idle stop mode, when the charge amount of the high voltage battery 122 is insufficient, or when the engine 110 is not sufficiently warmed, the driving is continued without stopping the engine 110. Further, during the idle stop mode, it is necessary to secure a drive source for auxiliary equipment that uses the engine 110 as a drive source, such as an air conditioner compressor. In this case, the motor generator 120 is driven to drive the accessories.

  When in the acceleration mode or in the high load operation mode, the load on the engine 110 increases, so that the DC power of the high voltage battery 122 is converted into AC power by the inverter device 121 and supplied to the motor generator 120 to drive the motor generator 120. The rotational driving force of the motor generator 120 is transmitted to the engine 110. By this. Assist driving of the engine 110. When the high voltage battery 122 is in a charging mode that requires charging, the motor generator 120 is driven by the engine 110. As a result, AC power is generated, the generated power is converted into DC power by the inverter device 121, and the high voltage battery 122 is charged. When the vehicle is in a regeneration mode such as when the vehicle is braked or decelerated, the kinetic energy of the vehicle is transmitted to the motor generator 120 to drive the motor generator 120. As a result, AC power is generated, the generated power is converted into DC power by the inverter device 121, and the high voltage battery 122 is charged.

  Next, the configuration of the motor generator 120 will be described.

  The motor generator 120 is a synchronous AC machine, and is an air cooler that uses air as a cooling medium. As described above, the motor generator 120 operates as a synchronous motor when the engine 110 is restarted, and operates as a synchronous generator when the high-voltage battery 122 is charged and in the regeneration mode. In the following description of the present embodiment, a case where the motor generator 120 and the inverter device 121 are separated will be described. However, the motor generator 120 and the inverter device 121 are integrated, that is, the switching element of the inverter device 121 and the switching device. In some cases, a driving circuit to be driven is disposed at the same place as a part of the motor generator 120, for example, a voltage regulator or a brush holder.

  In the figure, reference numerals 1 and 2 denote a pair of end brackets constituting the housing of the motor generator 120. The end frames 1 and 2 are aluminum bowl-shaped members. A cylindrical bearing box is formed at the center of the side surfaces of the end brackets 1 and 2 (the portion corresponding to the bottom of the bowl-shaped member). Bearings 6 and 7 are provided in the bearing boxes of the end brackets 1 and 2. The bearings 6 and 7 rotatably support the shaft 12 extending in the opposing direction of the end brackets 1 and 2.

  A stator is sandwiched between the opening portions of the end brackets 1 and 2 facing each other, and is fixed thereby. The stator includes a stator core 4 and a stator coil 3. The stator core 4 is a cylindrical iron core formed by laminating a plurality of annular magnetic members. The stator coil 3 is inserted into a plurality of slots formed in the inner peripheral portion of the stator core 4 and is constituted by a three-phase star connection.

  A pole core 9 is fixed to a portion of the shaft 12 facing the inner peripheral side of the stator core 4 so as to face the stator core 4 with a gap. In the pole core 9, a pair of cores having a plurality of claw-shaped magnetic poles in the circumferential direction are opposed in the rotation axis direction, and the claw-shaped magnetic poles of one core and the claw-shaped magnetic poles of the other core are alternately arranged in the circumferential direction (rotation direction) It is fixed to the shaft 12 so as to be arranged in the above. Thereby, different magnetic poles are alternately arranged in the circumferential direction. In a portion of the pole core 9 facing the inner peripheral surface of the claw-shaped magnetic pole, an insulating field coil 8 is wound around a bobbin and provided concentrically.

  A slip ring 10 is fixed to one end of the shaft 12. The slip ring 10 is electrically connected to the field coil 8 via a lead wire, and is supplied with electric power from the brush 16a that is in sliding contact. A pulley 120a is fixed to the other end of the shaft 12 by a nut. Cooling centrifugal fans 13 and 14 as cooling means are fixed to both end surfaces of the pole core 9 in the rotation axis direction. The cooling centrifugal fans 13 and 14 rotate together with the pole core 9 to take outside air into the machine, circulate the outside air into the machine to cool the inside of the machine, and discharge the cooled outside air to the outside. In this embodiment, a rotor 11 is composed of a shaft 12, a pole core 9, a field coil 8, a slip ring 10, and cooling centrifugal fans 13 and 14.

  In the motor generator 120, the pulley 120a side is called a front side, and the opposite side to the pulley 120a side is called a rear side. Therefore, the end bracket 1 is a front side end bracket, the end bracket 2 is a rear side end bracket, the bearing 6 is a front side bearing, the bearing 7 is a rear side bearing, the cooling centrifugal fan 13 is a front side cooling centrifugal fan, and a cooling side. The centrifugal fan 14 may be called a rear cooling centrifugal fan.

  A brush holder 16 and an IC regulator 17 (also referred to as a voltage adjusting device) are disposed in a space portion of the end bracket 2 separated from the rotor 11 side by the fan guide 18, and the end bracket is constituted by a plurality of fixing bolts and nuts. 2 is fixed. The fan guide 18 is an annular member, and is provided with a plurality of openings that allow the space portion separated by the end bracket 2 and the space portion on the rotor 11 side to communicate with each other. The IC regulator 17 controls the field current flowing through the field coil 8 via the brush 16a, and controls the rotational torque and generated power of the motor generator 120. The brush holder 16 holds the brush 16a and presses the brush 16a against the slip ring 10 to make sliding contact. As a result, a field current for exciting the field coil 8 is supplied from one of the brushes 16a to one of the slip rings 10 and from there to the field coil 8 via a lead wire. Further, the supplied field current is supplied to the other of the slip ring 10 through a lead wire, and is then energized to the outside through the brush 16a. The slip ring 10 is fixed on the shaft 12 by a resin mold described later.

  The end brackets 1 and 2 are provided with a plurality of openings for communicating the outside with the interior of the machine. When the cooling centrifugal fans 13 and 14 are rotated, air is taken into the apparatus from the outside through the openings. Further, the cooled air is discharged to the outside through the opening. The air taken into the machine from the outside by the rotation of the cooling centrifugal fan 14 is taken into the space of the end bracket 2 separated by the fan guide 18 through the opening of the end bracket 2 to cool the IC regulator 17 and the like. Then, the air is introduced into the space portion on the rotor 11 side through the opening provided in the fan guide 18, and the rotor 11 and the stator are cooled and discharged to the outside from the opening of the end bracket 2. On the other hand, the air taken into the machine from the outside due to the rotation of the cooling centrifugal fan 13 is taken in through the opening of the end bracket 1 to cool the rotor 11 and the stator to the outside through the opening of the end bracket 1. Discharged.

  A magnet resin 19 is provided on the outer periphery of the resin molding the slip ring 10. The magnet resin 19 has a ring shape, and N poles and S poles are alternately arranged in the circumferential direction corresponding to the claw-shaped magnetic poles of the pole core 9, and in order to detect the magnetic pole position of the pole core 9. This constitutes the object to be detected. In the magnet resin 19 of the present embodiment, the N pole and the S pole are alternately arranged in the circumferential direction, but either the N pole or the S pole may be configured by a nonmagnetic portion.

  Three magnetic pole position detecting semiconductor elements 20 fixed to the fan guide 18 via fixing brackets 20a are disposed at a portion facing the magnet resin 19. In this embodiment, a Hall element or Hall IC is used as the magnetic pole position detection semiconductor element 20. In the present embodiment, since the magnetic pole of the hole core 9 is 12 poles (there are 12 claw-shaped magnetic poles), the magnetic pole position detecting semiconductor element 20 can be expressed in terms of electrical angle with a mechanical angle of 20 degrees in the circumferential direction. It arrange | positions so that it may become 120 degree intervals. The interval in the circumferential direction of the magnetic pole position detecting semiconductor element 20 may be an electrical angle of 120 degrees. Therefore, the arrangement interval of the magnetic pole position detection semiconductor elements 20 does not need to be limited to 20 degrees in terms of mechanical angle, and can be set to have an electrical angle of 120 degrees in consideration of the relationship with other components. Good.

  The outputs of the three magnetic pole position detection semiconductor elements 20 are input to the inverter control circuit of the inverter device 121, and the magnetic pole position of the pole core 9 is detected. The detected magnetic pole position is used for calculating a command value for driving the motor generator 120 as a feedback control amount. The command value calculated in consideration of the magnetic pole position is input to the inverter drive circuit of the inverter device 121. The inverter drive circuit of the inverter device 121 generates drive signals for driving the six power control semiconductor elements based on the input command value, and the gate electrodes of the power control semiconductor elements constituting the three-phase bridge circuit Add to. As a result, the power control semiconductor element is turned on / off, and the DC power supplied from the high-voltage battery 122 is converted into three-phase AC power. Further, when the motor generator 120 is operating as a generator, the generated three-phase AC power can be converted (rectified) into DC power by turning on and off the power control semiconductor element. Note that the inverter device 121 of this embodiment uses a rectangular wave drive system with 120-degree energization or 180-degree energization, and controls driving of the motor generator 120.

  According to the present embodiment described above, the magnet resin 19 constituting the detected object is provided on the outer periphery of the resin molding the slip ring 10, and the magnetic pole position detecting semiconductor element 20, Since the Hall element or Hall IC is provided to constitute the magnetic pole position detection means of the Rundel type rotor, the magnetic resin and magnetic pole position detection that constitutes the detection target without changing the structure and design dimensions of the motor generator 120 The magnetic pole position detecting means can be provided in the motor generator 120 simply and inexpensively by simply adding the semiconductor element 20 to the above-mentioned part.

  Therefore, according to the present embodiment, the magnetic pole position detecting means, which is less expensive than the existing magnetic pole position detecting means such as a resolver or an encoder, does not greatly change the structure of the Rundel rotor, and the size of the motor generator 120 is increased. It is possible to provide the motor generator 120 without making it.

  A second embodiment of the present invention will be described with reference to FIG. FIG. 3 shows the overall configuration of the motor generator of this embodiment. Compared with the previous example, the present example is different in the part where the magnetic pole position detecting means is provided, and the other configuration is the same as the previous example. Therefore, in the following description, only parts different from the previous example will be described.

  In the magnetic pole position detecting means of the present embodiment, the magnet 21 is fixed between the claw-shaped magnetic poles adjacent to the pole core 9 in the circumferential direction. The magnet 21 is rod-shaped and protrudes in the axial direction from one axial end of the pole core 9. In the present embodiment, the magnet 21 protrudes from the front end portion of the pole core toward the front end bracket 1. The magnet 21 is magnetized in the protruding direction, that is, in the axial direction. Thereby, the magnet 21 corresponding to one of the claw-shaped magnetic poles of the pole core 9 and the space portion (nonmagnetic portion) corresponding to the other are alternately arranged in the circumferential direction on one end side of the pole core 9 in the axial direction. A configured object to be detected is configured. Three magnetic pole position detecting semiconductor elements 20 fixed to the end bracket 1 via the fixing bracket 20a are arranged at a portion facing the magnet 21. The magnetic pole position detecting semiconductor element 20 is arranged in the same relationship as in the previous example using a Hall element or Hall IC as in the previous example. In the present embodiment configured as described above, the same effect as the previous example can be obtained.

  A third embodiment of the present invention will be described with reference to FIG. FIG. 4 shows the overall configuration of the motor generator of this embodiment. Compared with the previous example, the present example is different in the part where the magnetic pole position detecting means is provided, and the other configuration is the same as the previous example. Therefore, in the following description, only parts different from the previous example will be described.

  In the magnetic pole position detection means of the present embodiment, an annular fixture 22a that is a plate member is provided on the shaft 12 and between the pole core 9 and the end bracket 1, and a ring is provided on the outer periphery of the fixture 22a. A magnet 22 is provided to constitute a detection object for detecting the magnetic pole position of the pole core 9. The ring magnet 22 has N poles and S poles alternately arranged in the circumferential direction corresponding to the claw-shaped magnetic poles of the pole core 9. In addition, although the ring magnet 22 of a present Example has alternately arrange | positioned the north-pole and a south pole in the circumferential direction, you may comprise any one of a north-pole and a south pole as a nonmagnetic part. Three magnetic pole position detecting semiconductor elements 20 fixed to a fixing metal fitting 20a that also serves as a cover of the bearing 6 are disposed at a portion facing the ring magnet 22. Also in this embodiment, as in the previous example, the magnetic pole position detecting semiconductor element 20 is arranged in the same relationship as in the previous example by using a Hall element or a Hall IC. In the present embodiment configured as described above, the same effect as the previous example can be obtained.

1 is a cross-sectional view showing a configuration of a motor generator that is a first embodiment of the present invention. The block diagram which shows the structure of the powertrain system of the motor vehicle in which the motor generator of FIG. 1 is used. Sectional drawing which shows the structure of the motor generator which is 2nd Example of this invention. Sectional drawing which shows the structure of the motor generator which is 3rd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 ... Stator core, 9 ... Pole core, 10 ... Slip ring, 12 ... Shaft, 19 ... Magnet resin, 20 ... Semiconductor element for magnetic pole position detection, 21 ... Magnet, 22 ... Ring magnet

Claims (7)

A stator,
A rotor provided rotatably on the stator via a gap,
The rotor is
A rotating shaft rotatably supported by a bearing;
An iron core provided on the rotating shaft;
A slip ring held on the rotating shaft by a holding member,
The iron core includes a plurality of claw-shaped magnetic poles arranged so that the polarities are alternately different in the rotation direction of the rotor,
The slip ring is
Electrically connected to the windings mounted on the iron core;
And receiving the exciting current supplied to the winding from the brush,
On the outer periphery of the holding member, a magnetic member constituting a detected body for detecting the magnetic pole position of the rotor is provided,
A rotating electric machine characterized in that a detecting means for detecting magnetism of the magnetic member is provided at a portion facing the magnetic member. In the rotating electrical machine according to claim 1,
The magnetic member is
It is formed from a ring-shaped magnet resin,
And different polarities corresponding to the magnetic pole position of the rotor are alternately arranged in the rotation direction of the rotor,
The means for detecting the magnetism is a plurality of Hall elements or a plurality of Hall ICs,
The plurality of Hall elements or the plurality of Hall ICs are:
It is provided at a portion facing the outer peripheral surface of the magnet resin,
In addition, the rotating electrical machine is arranged at a predetermined angle in the rotation direction of the rotor corresponding to the number of magnetic poles of the rotor. A stator,
A rotor provided rotatably on the stator via a gap,
The rotor is
A rotating shaft rotatably supported by a bearing;
An iron core provided on the rotating shaft,
The iron core is
A plurality of claw-shaped magnetic poles arranged so that the polarities are alternately different in the rotation direction of the rotor;
A magnetic member constituting a detected body for detecting the magnetic pole position of the rotor,
The magnetic member is
It is held between the claw-shaped magnetic poles,
And one side of the end portion protrudes outward in the axial direction from one side of the axial end portion of the iron core,
A rotating electric machine characterized in that means for detecting magnetism of the magnetic member is provided at a portion facing the protruding end of the magnetic member. In the rotating electrical machine according to claim 3,
The magnetic member is composed of a plurality of magnets held between the claw-shaped magnetic poles adjacent to each other in the rotation direction of the rotor,
The plurality of magnets are:
Corresponding to one of the claw-shaped magnetic poles,
And is magnetized in the axial direction,
And the tip is arranged alternately with the non-magnetic part in the rotation direction of the rotor,
The nonmagnetic part is
It corresponds to the other magnetic pole of the claw-shaped magnetic pole,
And an air layer formed between the magnets adjacent to each other in the rotation direction of the rotor,
The means for detecting magnetism is a plurality of Hall elements or a plurality of Hall ICs,
Multiple Hall elements or multiple Hall ICs
It is provided in a portion facing the axial end surface of the magnet,
The rotating electrical machine is arranged at a predetermined angle in the rotating direction of the rotor corresponding to the number of magnetic poles of the rotor. The rotating electrical machine according to any one of claims 1 to 4 ,
The stator is
A stator core,
A stator winding mounted on the stator core,
The stator winding receives a supply of electric power controlled according to the output of the means for detecting the magnetism and generates a rotating magnetic field according to the magnetic pole position of the rotor. . In the rotating electrical machine according to any one of claims 1 to 5 ,
A rotating electric machine characterized in that a cooling fan for introducing outside air to circulate the inside of the machine is attached to both ends of the iron core in the axial direction. Mounted on a vehicle driven by an internal combustion engine,
When the internal combustion engine is restarted after the internal combustion engine is stopped, the electric power supplied from the battery is received via the inverter and operates as an electric motor, thereby generating rotational driving force and restarting the internal combustion engine. Yes,
And after restarting the internal combustion engine, it is rotationally driven by the internal combustion engine to operate as a generator, thereby generating electric power and supplying the electric power to the battery via the inverter,
And the motor generator for vehicles comprised by the rotary electric machine in any one of Claims 1 thru | or 6 .

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