JP2022187534A - Rotary electric machine device - Google Patents

Abstract

To improve a rotation detection accuracy and prevent an erroneous operation of a semiconductor element which is caused by a fluctuation of a magnetic field when a magnet rotates, in a case where a rotary electric machine and a control device are integrated together for downsizing and weight reduction.SOLUTION: A rotary electric machine device 300 includes: a stator 10 having stator winding 16; a rotor 5 having a shaft 4 which has, on one end thereof, a rotation detection magnet 15, a stator core 7 through which the shaft passes and around which rotor winding 8 is wound, and a slip ring 11 which is disposed between the rotation detection magnet and the stator core in the shaft and is connected to the rotor winding; a brush 14 coming into contact with the slip ring; a wiring board 23 having a rotation sensor 27 mounted on one surface opposed to the rotation detection magnet, and having, on the other surface, a control circuit 22 and a current control element 30 which is driven by the control circuit and supplies power to the rotor winding via the brush and the slip ring; and an inverter 20 driven by the control circuit and supplies power to the stator winding.SELECTED DRAWING: Figure 1

Description

The present application relates to a rotating electric machine.

BACKGROUND ART Rotating electric machines for vehicles generate electric power by rotating a rotor, or rotate the rotor by supplying electric power. 2. Description of the Related Art There is a rotating electrical machine including a rotor having rotor windings, current control elements for supplying current to the rotor windings, and control circuits for controlling the current control elements.

2. Description of the Related Art There are rotating electric machines in which power is supplied to a rotor winding provided in a rotor iron core of a rotor through brushes and slip rings. In a rotating electric machine, the problem is how to install the current control element and the control circuit. This is because it is necessary to reduce the size and weight of the rotary electric machine. In particular, in a rotating electric machine having a magnet for detecting rotation at one end of the shaft of the rotor, the wiring board on which the current control element and the control circuit are arranged is used in order to accurately detect the rotation angle and to reduce the size and weight. Furthermore, a rotary electric machine device provided with a rotation sensor has been disclosed (for example, Patent Document 1).

Patent No. 6379895

Patent Literature 1 discloses a rotating electric machine connected to an engine via a pulley and a belt. The inverter is connected to the stator windings of the stator. The three-phase stator windings and the inverter are connected by three-phase wiring, and a control circuit for controlling the inverter is provided on the wiring board. The inverter and the wiring board are integrated with the rotary electric machine.

A rotation sensor is arranged on the wiring board so as to face the magnet arranged at one end of the rotating shaft of the rotor. A signal from the rotation sensor is input to a control circuit to recognize the rotation angle of the rotor. A control circuit drives current control elements that feed the rotor windings through brushes and slip rings. A current control element is provided on a wiring board, and a controller-integrated dynamoelectric machine is shown.

In a controller-integrated rotating electrical machine device in which a rotating electrical machine, an inverter, a control circuit, and a current control element are integrated, by providing a rotation sensor on a wiring board, the rotating electrical machine device can be miniaturized while improving rotation detection accuracy. can be done. However, if the wiring board is arranged close to the magnet arranged at one end of the rotating shaft of the rotor, the magnetic field of the magnet may affect the electrical signals of the semiconductor elements mounted on the wiring board, resulting in malfunction. be.

The present application has been made in view of the actual situation as described above. The object is to obtain a rotating electric machine that improves rotation detection accuracy and prevents malfunctions that occur in semiconductor elements due to fluctuations in the magnetic field caused by the rotation of magnets, in order to reduce the size and weight by integrating the rotating electric machine and the control device. do.

The rotary electric machine device according to the present application is
a stator having stator windings;
A shaft having a rotation detection magnet at one end, a rotor core through which the shaft passes and wound with a rotor winding, and a rotor winding provided between the rotation detection magnet and the rotor core on the shaft. a rotor having a slip ring connected thereto;
brushes contacting slip rings,
A rotation sensor is mounted on one side facing the rotation detecting magnet, and a control circuit and a current control element driven by the control circuit are mounted on the other side to supply power to the rotor winding via brushes and slip rings. wiring board,
It has an inverter driven by a control circuit that feeds the stator windings.

According to the rotary electric machine device according to the present application, when the rotary electric machine and the control device are integrated to reduce the size and weight, the rotation detection accuracy is improved and the malfunction that occurs in the semiconductor element due to the magnetic field fluctuation caused by the rotation of the magnet is reduced. It is possible to obtain a rotating electric machine device that is prevented.

1 is a configuration diagram of a rotating electric machine device according to Embodiment 1; FIG. 1 is a circuit configuration diagram of a rotating electric machine device according to Embodiment 1. FIG. FIG. 2 is an explanatory diagram of the component arrangement of the rotary electric machine device according to Embodiment 1; FIG. 4 is an explanatory diagram of cooling air for the rotary electric machine according to the first embodiment;

Embodiment 1
Hereinafter, a rotating electric machine device according to the present application will be described with reference to the drawings. FIG. 1 is a configuration diagram of a rotating electric machine device 300 according to Embodiment 1. As shown in FIG.

<Overall composition>
FIG. 1 is a schematic cross-sectional view of the rotary electric machine device 300 taken along a plane passing through the axis C of the shaft 4. As shown in FIG. A pulley 3 is fixed to one end of the shaft 4 for driving or being driven by the rotary electric machine device 300 .

In FIG. 1, the rotary electric machine device 300 is, for example, a motor-generator device that receives power and functions as a device that supplies driving force as an electric motor, and that is driven and functions as a power generator as a power supply device. A direction parallel to the axis C of the shaft 4 of the rotor 5 is defined as an axial direction Z, one axial side Z1 on which the pulley 3 is mounted is the front side in the axial direction, and the other axial side Z2 is the axis. It is called the rear side of the direction. The radial direction with respect to the axis C of the shaft 4 is defined as the radial direction Y, and the radial inner side Y1 and the radial outer side Y2 are defined as shown in FIG.

A rotor 5 and a stator 10 are built in a housing 1 composed of a front bracket 1a and a rear bracket 1b made of aluminum. A rotor winding 8 is wound around a rotor core 7, and a shaft 4 passes therethrough. The shaft 4 is rotatably fixed to the housing 1 by bearings 6a, 6b. A fan 9 is fixed to the inner side of the shaft 4 supported by the bearings 6a and 6b, and serves to send out cooling air.

Rotor winding 8 is electrically connected to a slip ring 11 mounted on shaft 4 . The rotor windings 8 are supplied with current from current control elements 30 on the circuit board 23 through the brushes 14 and the slip rings 11 . The rotary electric machine 100 includes the rotor 5 and the stator 10 in the range from the end of the shaft 4 on the front side Z1 in the axial direction where the pulley 3 is mounted to the brush 14 .

On the other hand, the control device 200 is configured by the control circuit 22 , the current control element 30 , the current sensor 32 , the second current sensor 33 , the rotation sensor 27 and the like mounted on the circuit board 23 . Although the inverter 20 is provided inside the circuit board case 28 containing the circuit board 23 in FIG.

Current to the rotor windings 8 of the rotor 5 is supplied by current control elements 30 which are controlled by the control circuit 22 on the circuit board 23 . A three-phase stator winding 16 wound around a stator core 17 of the stator 10 is supplied with current from an inverter 20 . A control circuit 22 controls the supply current of the inverter 20 .

A brush 14 of the rotating electric machine 100 is housed in a brush holder 13 and slides on the outer peripheral surface of the slip ring 11 . The brush 14 is housed in the brush holder 13 so as to be cooled because heat is generated due to the current flowing through the sliding portion. Further, the inverter 20 is also supplied with current by the switching circuit and generates heat. Furthermore, the current control element 30 mounted on the circuit board 23 also generates heat because current flows with loss. Therefore, a heat radiating member 25 is attached to cool the periphery of the current control element.

A magnet holder 12 to which a magnet 15 is attached is provided at the end of the shaft 4 on the rear side Z2 side in the axial direction. A rotation sensor 27 is mounted close to the magnet 15 on the surface of the circuit board 23 facing the magnet 15 in the front side Z1 direction in the axial direction. By adopting such a configuration, it is possible to reduce the size of the rotation detection device of the rotary electric machine. This is because the wiring up to the control circuit can be simplified as compared with the case where the rotation sensor is provided in a place different from the circuit board 23 .

A current control element 30 and a control circuit 22 are mounted on the rear side Z2 direction surface of the circuit board 23 in the axial direction. Consists of pattern wiring. The circuit board 23 is configured such that a pattern wiring made of a copper plate surrounds an epoxy resin containing glass fiber. The base material of the circuit board 23 may be made of ceramic containing alumina instead of epoxy resin containing glass fiber. The surface of the circuit board 23 in the circuit board case 28 on the rear side Z2 in the axial direction is sealed with a resin 26 . It is covered with a cover 24 and protected from water and foreign matter entering from the outside.

A brush holder 13 and an inverter 20 are arranged between the circuit board 23 and the rotor. Both are arranged side by side on a plane perpendicular to the shaft 4 with a predetermined interval in the circumferential direction around the axis C. As shown in FIG. The brush holder 13 and the inverter 20 are surrounded by a circuit board case 28 to be drip-proof, waterproof and dust-proof. A front side Z1 direction portion of the circuit board case 28 in the axial direction has substantially the same diameter as the housing 1 of the rotary electric machine 100 and is arranged coaxially with the housing 1 .

<Current control circuit>
FIG. 2 is a circuit configuration diagram of the rotary electric machine device 300 according to the first embodiment. One end of the rotor winding 8 is connected to wiring connected to the positive side of the battery 40 via the current control element 30 , the brush 14 and the slip ring 11 . The other end of rotor winding 8 is grounded via brush 14 and slip ring 11 .

A semiconductor control element such as a field effect transistor or a bipolar transistor can be used as the current control element 30 . FIG. 2 shows an example in which a field effect transistor is used as the current control element 30. In FIG. The current control element 30 is driven by the control circuit 22, and the drain signal Vd, the gate signal Vg, and the source signal Vs are connected to the control circuit 22 to monitor the driving state.

A current sensor 32 is provided between the brushes 14 and the current control element 30 to detect the field current flowing through the rotor winding 8 . The current sensor may be of a type that performs current-voltage conversion and detection using a shunt resistor, but it is preferable to use a magnetic field detection type current sensor. This is because the current loss due to the shunt resistance can be eliminated and accurate measurement can be performed.

In FIG. 2, current detection wirings Vc1 and Vc2 for detecting current are input to the control circuit 22 at the output end of the current sensor 32 . These current detection wirings Vc1 and Vc2 are connected to the control circuit 22 on the same circuit board 23 as the current sensor 32 through the wiring pattern of the circuit board 23 .

A second current sensor 33 for detecting the phase current of the three-phase stator winding 16 is also connected to the control circuit 22 on the same circuit board 23 via the wiring pattern of the circuit board 23 . The second current sensor 33 is also desirably of the magnetic field detection type. In the case of the magnetic field detection type current sensor, the current is detected by the magnetic field generated when the phase current flows through the wiring pattern.

As shown in FIG. 1, the control circuit 22, the current control element 30, the flywheel diode 31, the current sensor 32, and the second current sensor 33 are mounted on the common circuit board 23 on the axial rear side Z2 direction side. and sealed with resin 26 made of epoxy resin or silicone resin.

<Rotation detection>
Next, a specific example of the rotation detection structure will be described. A rotation sensor 27 is mounted on the front side Z1 direction surface of the circuit board 23 in the axial direction. A magnetic force detection element such as a Hall IC can be used as the rotation sensor 27 . A rotation sensor 27 is provided so as to face the magnet 15 attached to the magnet holder 12 at the rear end of the shaft 4 .

The magnet 15 is a rare-earth magnet, such as a neodymium magnet or a samarium-cobalt magnet. The magnet 15 is composed of a plurality of magnetic poles in which N poles and S poles are alternately arranged. A magnet 15 and a magnet holder 12 made of non-magnetic metal such as brass or aluminum are connected to a ferromagnetic shaft 4 made of carbon steel.

The magnet 15 is configured to rotate synchronously with the shaft 4 and the magnetic flux of the rotor core 7 does not affect the magnet 15 . The magnet 15 rotates synchronously with the shaft 4 , so that the rotation sensor 27 can detect magnetic flux changes and detect the rotation angle, rotation speed, rotation angular speed, and the like of the rotor 5 .

<Shield of current control element and current sensor>
FIG. 3 is an explanatory diagram of component arrangement on the circuit board 23 of the rotary electric machine device 300 according to the first embodiment. The arrangement of the current control element 30 that controls the current of the rotor winding 8, the current sensor 32 using the magnetic field detection type current sensor, the second current sensor 33, etc. will be described.

The rotation sensor 27 mounted on the surface of the circuit board 23 in the front side Z1 direction in the axial direction and the magnet 15 attached to the end of the shaft 4 in the rear side Z2 direction in the axial direction are spaced apart by a distance L in the axial direction. be done. The distance L is the dimension in the axial direction Z and is 1 mm, for example. Since the rotation sensor 27 can be arranged close to the magnet 15, the rotating electric machine and the control device 200 can be integrated to reduce the size and weight, and at the same time, the rotation detection accuracy can be improved.

On the other hand, the current control element 30 is mounted on the surface of the circuit board 23 in the rear side Z2 direction in the axial direction. The current control element 30 is mounted on the side opposite to the circuit board 23 with respect to the magnet 15 attached to the end of the shaft 4 in the rear side Z2 direction in the axial direction, so that it is less susceptible to magnetic force. Therefore, it is possible to prevent the semiconductor device from malfunctioning due to fluctuations in the magnetic field of the magnetic force caused by the rotation of the magnet 15 .

A current sensor 32 for detecting the current flowing through the rotor winding 8 is mounted on the same surface of the circuit board 23 as the current control element 30 . When a magnetic field detection type current sensor is used as the current sensor 32, the current can be detected with high accuracy, but there is a possibility that erroneous detection may occur due to the influence of the surrounding magnetic field. On the other hand, since the current sensor 32 is mounted on the opposite side of the circuit board 23 to the magnet 15 attached to the end of the shaft 4 in the rear side Z2 direction in the axial direction, it is affected by the magnetic force. Hateful. Therefore, the current sensor 32 can accurately detect the current flowing through the rotor winding 8, and can suppress erroneous detection.

Further, a second current sensor 33 for detecting phase currents flowing through the three-phase stator windings 16 is mounted on the same surface of the circuit board 23 as the current control element 30 and the current sensor 32 . If a magnetic field detection type current sensor is used as the second current sensor 33, the current can be detected with high precision as well, but erroneous detection may occur due to the influence of the surrounding magnetic field. Since the second current sensor 33 is also mounted on the opposite side of the circuit board 23 to the magnet 15 attached to the end of the shaft 4 in the rear side Z2 direction in the axial direction, it is less susceptible to magnetic force. Therefore, the second current sensor 33 can also accurately detect the phase current flowing in the stator winding 16, and it is possible to suppress erroneous detection.

Here, the circuit board 23 is considered. The surface of the circuit board 23 is covered with a pattern wiring made of a copper plate. The base material of the circuit board 23 is made of epoxy resin containing glass fiber or ceramic containing alumina. The circuit board 23 has a function of shielding a magnetic field by surrounding these base materials with pattern wiring of a copper plate.

Since the magnetic field of the magnet 15 existing in the front side Z1 direction in the axial direction is shielded against the surface of the circuit board 23 in the rear side Z2 direction in the axial direction, the current control element 30, the current sensor 32, and the second current sensor 33 can be suppressed. Further, the shielding effect does not reach the surface of the circuit board 23 in the front side Z1 direction in the axial direction. Therefore, the rotation detection accuracy of the rotation sensor 27 mounted on this surface is not impaired.

Therefore, the rotation detection accuracy is improved, and the magnetic field of the magnet 15 does not affect the electric signals of the current control element 30, the current sensor 32, and the second current sensor 33, so that the motor can rotate normally without malfunction. The field currents of the child winding 8 and the stator winding 16 can be controlled. Epoxy resin containing glass fiber has a relative magnetic permeability of 0.02, and alumina, which is the main component of ceramic, has a relative magnetic permeability of 0.0005. The pattern wiring made of the copper plate has a relative magnetic permeability of 1 and is a paramagnetic material. Therefore, since the relative magnetic permeability of the base material of the circuit board 23 is much lower than that of the pattern wiring made of the copper plate, the magnetic shielding effect is enhanced. If the base material around which the pattern wiring made of the copper plate of the circuit board 23 surrounds has a relative magnetic permeability of at least 0.1 or less or 1/10 or less of the relative magnetic permeability of the pattern wiring, the current control element 30, the current A magnetic shielding effect for the sensor 32 and the second current sensor 33 is obtained.

When a magnetic field detection type current sensor using an MI (Magneto Impedance) element is used for the current sensor 32 and the second current sensor 33, there is no power loss and the degree of field current detection is enhanced. By shielding the magnetic field of the magnet 15, which causes disturbance, with the circuit board 23, the current can be normally detected. Furthermore, by arranging the current control element 30 and the current sensor 32 close to each other, preferably adjacent to each other, the wiring inductance can be reduced and the detection accuracy of the field current can be improved.

<Arrangement of current control element and current sensor>
By arranging the current sensor 32, the current control element 30, and the second current sensor 33 on the outside Y2 in the radial direction with respect to the magnet 15, the distance from the magnet 15 can be secured, and the influence of the magnetic field of the magnet 15 can be reduced. can be reduced. Thereby, malfunction of the current sensor 32, the current control element 30, and the second current sensor 33 can be suppressed.

Here, the distances between the magnet 15 and the current sensor 32, the current control element 30, and the second current sensor 33 are examined. In FIG. 3, the current sensor 32, the current control element 30, and the second current sensor 33 are separated from the magnet 15 by a first distance D1, a second distance D2, and a third distance D3 radially outwardly Y2. It is shown how it is arranged. Strictly speaking, the linear distances of the current sensor 32, the current control element 30, and the second current sensor 33 with respect to the magnet 15 matter. However, if the distance between each component and the magnet 15 in the axial direction Z is sufficiently small with respect to the first distance D1, the second distance D2, and the third distance D3, the distance in the radial direction Y is mainly considered. It is also possible to If defined by the distance in the radial direction Y, there is an advantage that the placement of the current sensor 32, the current control element 30, and the second current sensor 33 on the circuit board 23 becomes clearer when designing, and judgment becomes easier. .

It is also significant to strictly calculate the influence of the magnetic field of the magnet 15 . With the first distance D1, the second distance D2, and the third distance D3 as the straight-line distances between the magnet 15 and the current sensor 32, the current control element 30, and the second current sensor 33, to the circuit board 23 of each component may be considered. This is because the influence of the magnet 15 on the current sensor 32, the current control element 30, and the second current sensor 33 is influenced by the linear distance between the magnet 15 and each part.

For example, the first distance D1 may be set to 35 mm, the second distance D2 to 40 mm, and the third distance D3 to 35 mm. The respective distances can be obtained by experiments to find sufficient distances that do not cause malfunction, but they may also be determined by theoretically calculating the range affected by the magnetic field of the magnet 15 . Empirically, the magnet 15 can avoid the influence of the change of the magnetic field due to the rotation of the

By ensuring the first distance D1, the second distance D2, and the third distance D3, the rotation of the shaft 4 of the rotor 5 can be accurately detected, and the current sensor 32, the current control element 30, and the second distance D3 can be detected. Since it is possible to prevent the current sensor 33 from malfunctioning, it is possible to contribute to reducing the size and weight of the rotary electric machine device 300 .

<Cooling of rotary electric machine>
FIG. 4 is an explanatory diagram of cooling air for rotating electric machine device 300 according to the first embodiment. FIG. 4 shows how outside air is introduced from the cooling air introduction path 401 provided on the side surface of the circuit board 23 on the front side Z1 direction side in the axial direction. The introduced cooling air is guided in the axial direction toward the front side Z1 through a cooling air lead-out path 402 provided in the circuit board case 28 . Then, while cooling the brush 14, the brush holder 13 or the inverter 20 and the heat radiating member 21, the cooling air is sucked out from the cooling air introduction passage 403 of the rear bracket 1b by the fan 9 provided in the rotor 5, and rotates from the cooling air introduction passage 404. It is released outside the electric machine.

As shown in FIG. 4, cooling air is taken in from the radially outer side Y2 to the radially inner side Y1 along the circuit board 23, so that the current control element 30 arranged on the outer side in the radial direction Y of the circuit board 23, the current The sensor 32 and the second current sensor 33 can be efficiently cooled. This is because the unheated cooling air can first cool the current control element 30 , the current sensor 32 and the second current sensor 33 from the back surface of the circuit board 23 . Also, in order to efficiently cool these parts, additional parts such as the heat dissipation member 25 may be provided.

According to the first embodiment, when the rotating electrical machine 100 and the control device 200 of the rotating electrical machine device 300 are integrated, the current control element 30 and the current sensor 32 are mounted on the rear side Z2 direction surface of the circuit board 23 in the axial direction. , the second current sensor 33 was mounted, and the current control element 30 and the control circuit 22 were connected by pattern wiring on the circuit board 23 . Further, the current sensor 32, the second current sensor 33 and the control circuit 22 are also connected by pattern wiring. The wiring is composed of the pattern wiring of the circuit board 23, and the rotation sensor 27 mounted on the surface of the circuit board 23 in the front side Z1 direction in the axial direction and the axial rear of the shaft 4 that emits the magnetic force detected by the rotation sensor 27. Since the magnets 15 arranged at one end in the side Z2 direction are arranged so as to face each other so as to be close to each other, the rotation detection accuracy can be improved. In addition, due to the shielding characteristics of the circuit board 23, the magnetic field of the magnet 15 does not affect the electric signals of the current control element 30, the current sensor 32, and the second current sensor 33, thereby preventing malfunction. Further, by arranging the current control element 30, the current sensor 32, and the second current sensor 33 on the circuit board 23 at a distance from the magnet 15, malfunction can be reliably prevented. Therefore, the field currents of the rotor winding 8 and the stator winding 16 can be accurately controlled while reducing the size and weight of the rotary electric machine.

In addition, a cooling air introduction path 401, a cooling air introduction path 402, and a cooling air introduction path 403 are arranged so as to take in the cooling air from the outside on the front side Z1 direction surface in the axial direction of the circuit board 23, and the cooling air is sucked. By providing the fan 9 and the cooling air lead-out path 404, the heat generation of the current control element 30, the current sensor 32, and the second current sensor 33 is suppressed, and the air between the circuit board 23 and the magnet 15 is prevented. By interposing, the field current can be normally controlled without affecting the electric signal of the semiconductor element and causing no malfunction. Furthermore, the brushes 14, the inverter 20, the rotor 5, and the stator 10 can be cooled.

Although the present application has described exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to application of particular embodiments, alone or Various combinations are applicable to the embodiments. Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, the modification, addition, or omission of at least one component shall be included.

4 shaft, 5 rotor, 7 rotor core, 8 rotor winding, 9 fan, 10 stator, 11 slip ring, 15 magnet, 16 stator winding, 22 control circuit, 23 circuit board, 27 rotation sensor, 28 circuit board case 30 current control element 32 current sensor 33 second current sensor 300 rotary electric machine device 401, 403 cooling air introduction path 402, 404 cooling air introduction path D1 first distance D2 second second distance, D3 third distance, Y radial direction, Y1 radial inner side, Y2 radial outer side, Z axial direction, Z1 axial direction one side, Z2 axial direction other side

The rotary electric machine device according to the present application is
a stator having stator windings;
A shaft having a rotation detection magnet at one end, a rotor core through which the shaft passes and wound with a rotor winding, and a rotor winding provided between the rotation detection magnet and the rotor core on the shaft. a rotor having a slip ring connected thereto;
brushes contacting slip rings,
A rotation sensor is mounted on one surface facing the rotation detecting magnet, and on the other surface, a control circuit, a current control element driven by the control circuit and supplying power to the rotor winding via brushes and slip rings, and a current a wiring board on which is mounted a current sensor physically adjacent to the control element to detect the current supplied to the rotor winding ;
an inverter driven by the control circuit to feed the stator windings.

Claims (16)

a stator having stator windings;
a shaft having a rotation detection magnet at one end; a rotor core through which the shaft passes and wound with a rotor winding; a slip ring connected to the rotor winding;
a brush in contact with the slip ring;
A rotation sensor is mounted on one surface facing the rotation detection magnet, and a control circuit and a current control device driven by the control circuit on the other surface to supply power to the rotor winding via the brushes and the slip ring. A wiring board on which elements are mounted,
A rotary electric machine, comprising: an inverter driven by the control circuit to supply power to the stator windings. 2. The rotary electric machine apparatus according to claim 1, wherein a current sensor for detecting a current supplied to said rotor winding is mounted on said other surface of said wiring board. 3. The rotary electric machine device according to claim 2, wherein the current sensor is mounted adjacent to the current control element on the other surface of the wiring board. 4. The rotary electric machine according to claim 2, wherein said current sensor is a magnetic field detection type current sensor. The rotary electric machine apparatus according to any one of claims 2 to 4, wherein the current sensor is arranged radially outside of the rotation detection magnet. The axial distance between the rotation sensor and the rotation detection magnet is the radial distance between the current sensor and the rotation detection magnet or the linear distance between the current sensor and the rotation detection magnet. 6. The rotary electric machine according to claim 5, which is one tenth or less of the distance of . The rotary electric machine apparatus according to any one of claims 1 to 6, wherein the current control element is arranged radially outside the rotation detection magnet. The axial distance between the rotation sensor and the rotation detection magnet is the radial distance between the current control element and the rotation detection magnet or the linear distance between the current control element and the rotation detection magnet. 8. The rotary electric machine device according to claim 7, which is one tenth or less of the second distance. 9. The rotary electric machine apparatus according to claim 1, wherein a second current sensor for detecting a current supplied to said stator winding is mounted on said other surface of said wiring board. 10. The rotary electric machine device according to claim 9, wherein said second current sensor is a magnetic field detection type current sensor. 11. The rotary electric machine apparatus according to claim 9, wherein said second current sensor is arranged radially outside of said rotation detecting magnet. The axial distance between the rotation sensor and the rotation detection magnet is the radial distance between the second current sensor and the rotation detection magnet or the distance between the second current sensor and the rotation detection magnet. 12. The rotary electric machine according to claim 11, which is one tenth or less of the third distance which is the straight line distance. The rotary electric machine device according to any one of claims 1 to 12, further comprising a cooling air passage for allowing cooling air to flow into one surface side of the wiring board. a resin case that accommodates the wiring board and has a cooling air introduction passage that introduces cooling air from the radially outer side along the one surface of the wiring board and a cooling air discharge passage that guides the cooling air to the brush; prepared,
14. The rotating electrical machine apparatus according to claim 13, wherein the rotor has a fan that draws in and discharges cooling air. 15. The rotating electric machine device according to claim 1, wherein the wiring substrate is printed wiring made of a copper plate, and a substrate having a relative magnetic permeability of 0.1 or less is used. 16. The rotating electric machine device according to claim 1, wherein the base material of the wiring board is made of epoxy resin containing glass fiber or ceramic containing alumina.

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