JP6771604B2 - Control device integrated rotary electric machine - Google Patents

Description

The present application relates to a control device integrated rotary electric machine equipped with a control device for controlling the rotary electric machine.

In recent years, there has been an increasing demand for improved fuel efficiency of transportation equipment against the backdrop of global warming. Along with this, there is an urgent need to reduce the size and weight of field winding type rotary electric machines that supply electric power consumed by vehicle electrical components and charge vehicle batteries. However, in recent years, the number of electrical components and the power consumption due to the number of electrical components have been increasing, and rotary electric machines for vehicles are required to have a larger amount of power generation and high efficiency power generation performance. Therefore, in order to meet these demands, we are developing an alternator equipped with a low-loss diode or a rotating electric machine for vehicles such as a motor generator equipped with a power conversion circuit composed of power semiconductor elements such as MOS-FETs. It has been.

In particular, devices such as motor generators are provided with a function as an electric motor for starting or assisting an engine, in addition to the power generation function provided by a conventional alternator, in order to further improve the fuel efficiency of an automobile. At this time, in order to obtain sufficient output to start or assist the engine, the rotational position of the rotor of the rotary electric machine of the motor generator, especially the relative positional relationship between the rotor and the stator, is accurately determined. It needs to be detected.
At this time, when a device such as a motor generator is provided with a field winding of a rotor, or a controller-integrated rotary electric machine including a power conversion circuit composed of a power semiconductor element or the like, the rotation position is detected. The rotation position sensor is attached to.

In such a rotation position sensor, the current passing through the brush or slip ring, which is the path of the current from the power converter to the field winding, or the magnetic flux generated by energizing the field winding is the axis of the rotor. It is used in a harsh environment with many disturbances, such as leakage magnetic flux generated by being emitted through the coil or switching noise generated when the power conversion device operates. Various efforts have been made to detect the rotation position with high accuracy in such a large amount of disturbance.

For example, in Patent Document 1, a rotor including a rotating shaft having a slip ring, a brush device having a brush, a brush holder, and a cover member covering the slip ring together with the brush holder are arranged at one end of the rotating shaft. A vehicle equipped with a rotation position detected portion and a rotation position detection unit that detects the rotation position of the rotation position detected portion, and an insulating portion formed of an insulating material is arranged between the rotation position detected portion and the slip ring. Rotating machine for use is shown.

When brush wear powder accumulates, the brush wear powder has conductivity, so an electrical short circuit occurs between the rotation shaft and the slip ring, and current may flow to the rotation position detected part fixed to one end of the rotation shaft. is there. By arranging an insulating member between the slip ring and the rotation position detected portion, it is possible to prevent a short-circuit current from flowing through the rotation position detected portion. Further, in the case of a sensor in which the rotation position detection unit detects the magnetic force emitted from the rotation position detection unit, the insulating member is arranged between the rotation position detection unit and the rotor shaft, which is caused by the field winding. The influence of the leaked magnetic flux can be reduced. In this way, an attempt is made to prevent a decrease in the rotation position detection accuracy.

Further, Patent Document 2 describes a field winding having a field winding that generates an electromotive force on the rotor and an armature winding constituting the armature, and a field winding via a brush and a slip ring. It is equipped with a control circuit unit that controls the energization of the wire and an inverter power circuit unit that controls the energization of the armature winding. The brush is arranged between the field winding and the armature winding and the control circuit unit, and is a control circuit. The control board in which the unit is formed is housed in the control circuit unit mounting unit, and the control circuit unit mounting unit shows an electric generator device provided with a rotation sensor that detects the position of the rotor.

Japanese Patent No. 4893706 (Figs. 1 and 3) Japanese Patent No. 4286673 (FIGS. 1 and 2)

However, in the conventional rotary electric machine shown in Patent Document 1, the insulating member is composed of a member having low strength such as resin or a fragile member such as ceramic, and the fixing strength of the detected portion and the fixing strength The reliability is low, and the detection accuracy is low when the rotational acceleration is large. In addition, since the length of the rotating shaft in the longitudinal direction is increased by arranging the insulating member, it is necessary to abolish other parts and reduce the size in order to meet the miniaturization that is always required for the in-vehicle rotating electric machine. , It becomes a constraint on the composition of the product. In addition, the insulating member generally has a low thermal conductivity, which prevents heat generated by the slip ring and the brush from being released from the end of the rotating shaft. As a result, the length of the brush is increased in order to cope with the increase in the amount of wear of the brush due to the increase in the temperature of the brush, and the heat resistant temperature of the constituent members is improved, which causes an increase in product size or a deterioration in productivity.

Further, in the conventional rotary electric machine shown in Patent Document 1, the rotation position detecting unit for detecting the rotation position of the rotation position detected unit arranged at one end of the rotation shaft is located on the outer axial end surface of the rear side frame. It is connected to a control device fixed by a fixing means such as a bolt via a connecting line or the like. Therefore, the detection signal output from the rotation position detection unit may be superposed with the disturbance from the outside of the rotation position sensor, and the angle detection accuracy may be lowered.

Further, in the conventional motor generator device shown in Patent Document 2, the rotation sensor arranged at the rear end in the axial extension direction of the rear bracket is arranged inside the control circuit portion mounting portion made of a resin case. It is connected to the control board by external wiring. Therefore, similarly to the rotary electric machine of Patent Document 1, there is a possibility that the disturbance from the outside of the rotary sensor is superimposed on the detection signal output from the rotary sensor and the angle detection accuracy is lowered.

The present application has been made to solve the above-mentioned problems, and provides a rotary electric machine with an integrated control device that avoids the influence caused by disturbance from the outside of the rotary sensor and realizes highly accurate rotation position detection. The purpose is to do.

The controller-integrated rotary electric machine according to the present application has a rotor shaft rotatably supported by a housing, a field winding and a field iron core fixed to the rotor shaft and controlled by energization via a brush. A rotor having a rotor, a stator having an armor winding fixed to a housing and energized by a power conversion circuit unit controlled by a control circuit unit, and a stator having an armor winding, which are arranged on one end side in the longitudinal direction of the rotor shaft. It is composed of a power conversion device having a power conversion circuit unit and a control circuit unit, a signal detection unit and a signal detected unit, and has a rotation position sensor for detecting the position of the rotor. The control circuit unit is fielded with respect to the brush. Arranged on the opposite side of the winding and armor winding, the signal detection part of the rotation position sensor is formed or mounted on the same board as the control board of the control circuit part, and the signal detected part of the rotation position sensor rotates. Arranged so as to be in direct contact with the end of the child shaft on the control circuit section side , the control board is equipped with a semiconductor control element that constitutes a field circuit that energizes and controls the field winding, and the control circuit section provides a semiconductor control element. The signal wiring for controlling the energization of the control board is composed of the pattern wiring of the control board .

In the present application, the control circuit section is arranged on the side opposite to the field winding and the armature winding with respect to the brush, and the signal detection section of the rotation position sensor is formed on the same board as the control board on which the control circuit is formed. Alternatively, since it is mounted, it is possible to provide a rotary electric machine with an integrated control device that can realize highly accurate rotation position detection even in a special environment where there is a great deal of disturbance outside the rotation position sensor.

FIG. 5 is a schematic cross-sectional view of a rotary electric machine integrated with a control device according to the first embodiment. It is a circuit diagram which shows the control device of the control device integrated rotary electric machine according to Embodiment 1. FIG. FIG. 5 is a schematic external view showing a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a second embodiment. FIG. 5 is a schematic cross-sectional view showing a rotor shaft end portion including a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a third embodiment. FIG. 5 is a schematic cross-sectional view showing a rotor shaft end portion including a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a fourth embodiment. FIG. 5 is a schematic cross-sectional view showing a rotor shaft end portion including a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a fifth embodiment. FIG. 5 is a schematic cross-sectional view showing a rotor shaft end portion including a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a sixth embodiment. FIG. 5 is a schematic cross-sectional view showing a rotor shaft end portion including a signal-detected portion of a rotation position sensor used in a rotary electric machine integrated with a control device according to a seventh embodiment.

Embodiment 1.
Hereinafter, the rotary electric machine integrated with the control device according to the first embodiment of the present application will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic cross-sectional view showing a rotary electric machine integrated with a control device according to the first embodiment, and FIG. 2 is an internal circuit diagram of the control device. Although the controller-integrated rotary electric machine described in the first embodiment shows a motor generator, it can also be applied to a rotary electric machine for vehicles.

The rotary electric machine 100 rotates on the front bracket 1 as a housing, the rear bracket 2 as a housing, the bearing 11 fixed to the front bracket 1, the bearing 21 fixed to the rear bracket 2, and these bearings 11 and 21. A rotor shaft 4 that is freely supported, a stator 3 that is sandwiched and fixed by the front bracket 1 and the rear bracket 2 and has a stator core 31 and an armature winding (stator winding) 32. It includes a rotor 6 fixed to the rotor shaft 4 and having a field iron core 61 and a field winding 62, and a pulley 5 fixed to the front end of the rotor shaft 4. The rotary electric machine 100 is connected to the rotary shaft (not shown) of the engine via a belt (not shown) hung on the pulley 5.

In the following description, the side where the front bracket 1 is installed is the front side of the rotary electric machine, and the side where the rear bracket 2 is installed is the rear of the rotary electric machine when viewed from the central portion of the rotor shaft 4 in the axial direction. Called the side. Further, the front bracket 1 and the rear bracket 2 may be referred to as housings, respectively.

Since the temperatures of the rotor 6 and the stator 3 rise due to the heat generated when the rotary electric machine 100 is driven, cooling fans 63 are provided on both end faces in the axial direction of the rotor 6. The front bracket 1 and the rear bracket 2 are manufactured by aluminum die casting from the viewpoint of weight reduction and productivity. A pair of slip rings 7 mounted on the rear side of the rotor shaft 4, a brush holder 8 attached to the rear bracket 2 so as to be located on the outer periphery of the rear side of the rotor shaft 4, and a pair of slip rings 7. A pair of brushes 9 arranged in the brush holder 8 so as to be in contact with each other are provided. The field current described later is supplied to the field winding 62 via the pair of brushes 9 and the pair of slip rings 7.

An axially outer end of the rear bracket 2 of the rotary electric machine 100 is provided with a control device 200 that functions as a power conversion device for controlling the rotary electric machine 100.
As shown in FIG. 2, the control device 200 converts the DC power from the vehicle-mounted battery 10 as an external DC power source into AC power, or converts the AC power from the armature winding (fixer winding) 32 into DC power. A power conversion circuit unit 22 composed of two sets of three-phase AC circuits that convert to a field current, a field circuit unit 23 that supplies a field current to the field winding 62 of the rotor 6, a power conversion circuit unit 22, and a power conversion circuit unit 22. A control circuit unit 24 for controlling the field circuit unit 23 is provided.

The control device 200 is composed of a power conversion circuit unit 22, a field circuit unit 23, a control circuit unit 24, and a structural member that covers or connects them. Further, a smoothing capacitor 25 is connected between the vehicle-mounted battery 10 and the power conversion circuit unit 22. The rotary electric machine 100 is a so-called control device integrated rotary electric machine in which a control device 200 having a function of a power conversion device is mounted on an axially outer end of the rear bracket 2.

The armature winding 32 of a rotating electric machine is composed of, for example, two sets of three-phase armature windings that are out of phase by 30 degrees, and these three-phase armature windings include two sets of three-phase power conversion circuits. It is configured so that it can be controlled independently by the provided power conversion device.
The terminals of each phase of the Y-connected three-phase armature winding 32 are connected to the AC side terminals of the power conversion circuit unit 22 composed of the six power semiconductor elements 22a in the power conversion circuit unit 22. .. The DC side terminal of the power conversion circuit unit 22 is connected to the vehicle-mounted battery 10 and the smoothing capacitor 25. The field circuit unit 23 is connected to the vehicle-mounted battery 10 via the two semiconductor elements 23a.

When the rotary electric machine 100 is operated as an electric motor, the power semiconductor element 22a is switched and controlled by the control circuit unit 24 so that the power conversion circuit unit 22 operates as an inverter. As a result, the DC power from the vehicle-mounted battery 10 is converted into AC power by the power conversion circuit unit 22 and supplied to the armature winding 32. The armature winding 32 generates a rotating magnetic field and cooperates with the DC magnetic flux generated by the field winding 62 to rotate the rotor 6. At this time, the field current flowing through the field winding 62 is adjusted as necessary by the switching control of the semiconductor element 23a by the control circuit unit 24.

On the other hand, when the rotary electric machine 100 is operated as a generator, the power semiconductor element 22a is switched and controlled by the control circuit unit 24 so that the power conversion circuit unit 22 operates as a converter. As a result, the AC power generated in the armature winding 32 by the DC magnetic field generated by the field winding 62 of the rotating rotor 6 is converted into DC power by the power conversion circuit unit 22 and supplied to the in-vehicle battery 10. To. At this time, the field current flowing through the field winding 62 is adjusted as necessary by the switching control of the semiconductor element 23a by the control circuit unit 24.

In the controller-integrated rotary electric machine shown in FIG. 1, the signal line connection terminal of each power semiconductor element 22a is connected to the control circuit provided on the control board 240 in the control circuit unit 24 with a signal line connection member (not shown). It is connected via. Further, the AC side terminals of each phase of the power conversion circuit unit 22 are connected to the terminals of each phase of the armature winding 32. The control circuit provided on the control board 240 of the control circuit unit 24 is connected to the lead wire (not shown) from the engine control unit ECU (not shown) via the lead wire connecting unit.

The control circuit unit 24 includes a control board 240 and a resin case 241 for accommodating the control board 240. The control board 240 is fixed to the resin case 241 via a predetermined support means. The resin case 241 has a waterproof structure sealed by a waterproof cover or the like in order to prevent salt and muddy water from entering the control board 240 housed therein. The semiconductor element 23a constituting the field circuit unit 23 is mounted on the same substrate as the control substrate 240 described above. By mounting the field circuit unit 23 on the control board 240, the space of the control device 200 of the power conversion device can be saved as compared with the case where the field circuit unit 23 is mounted on another board.

A rotating electric machine such as a motor generator includes a power conversion circuit unit 22 that has both a rectifying function for generated current and a power conversion function such as an inverter. The power semiconductor element 22a constituting the power conversion circuit unit 22 is composed of a switchable power semiconductor element such as a MOS-FET. The power conversion circuit unit 22 is arranged at any position in the region 220 shown by hatching in FIG. 1, which is a space between the rear bracket 2 of the rotary electric machine 100 and the control circuit unit 24.

The brush 9 for supplying electric power to the field winding 62 is arranged between the field winding 62 and the armature winding 32 and the control circuit unit 24. Further, the control board 240 in which the control circuit is configured is housed in the resin case 241 of the control circuit unit 24 arranged on the side opposite to the field winding 62 and the armature winding 32 with respect to the brush 9. To.
The rotation position sensor 40 including the signal detection unit 41 and the signal detection unit 42 is arranged on the side opposite to the field winding 62 and the armature winding 32 with respect to the brush 9. The signal detected unit 41 of the rotation position sensor 40 is arranged so as to be in direct contact with the rotor shaft 4, and the signal detection unit 42 of the rotation position sensor is formed or mounted on the same substrate as the control board 240 of the control circuit unit 24. Has been done.

As the configuration of the rotation position sensor 40, an MR system sensor that uses a magnet for the signal detected portion 41 or an electromagnetic induction sensor that does not use a magnet is used. The MR sensor arranges a magnetic material or magnet near the outer periphery of the signal detected unit 41, and detects the rotational position of the magnetic material or magnet with a coil or Hall element provided in the signal detecting unit 42. In the electromagnetic induction sensor, metal is arranged as a signal detected unit 41, and a coil-shaped signal transmitting unit and a signal receiving unit are arranged as a signal detecting unit 42. A weak current is applied to the signal transmitting unit to generate a magnetic flux, and the signal receiving unit 41 having a signal blocking function rotates to shield the magnetic flux emitted from the signal transmitting unit and to shield the signal receiving unit. Receives less signal. This is used to detect the rotation position.

According to the controller-integrated rotary electric machine according to the first embodiment, between the field winding 62 and the position where the rotation position sensor 40 is arranged, which is the cause of the generation of the leakage flux which causes the detection accuracy of the rotation position to decrease. By arranging the brush 9 in the coil 9, the leakage flux emitted from the field winding 62 is sufficiently dampened when it reaches the rotation position sensor 40, and it is possible to prevent the detection accuracy of the rotation position from being lowered. .. As a result, even if the signal detected portion 41 is arranged at the end of the rotor shaft 4 without an insulating member, it is possible to prevent a decrease in the detection accuracy of the rotating position.

Further, since the signal detection unit 42, which is one of the constituent members of the rotation position sensor 40, is formed on the control board 240, the signal detection unit 42 is arranged in a portion different from the control board 240. , The size in the longitudinal direction of the rotor shaft 4 and the direction orthogonal to the longitudinal direction of the rotor shaft 4 can be saved in space.

Since the signal detected portion 41 of the rotation position sensor 40 is arranged so as to be in direct contact with the rotor shaft 4, when the signal detected portion 41 and the rotor shaft 4 are arranged with an insulating member such as resin in between. Can be fixed with much higher strength than. As a result, even when a large rotational acceleration acts on the signal-detected unit 41, the position of the signal-detected unit 41 does not shift, and it is possible to avoid a decrease in the detection accuracy of the rotational position. Further, since the rotor shaft 4 to the signal-detected portion 41 do not include an insulating member such as a resin having a low thermal conductivity, the heat generated by the brush 9, the slip ring 7, the field winding 62, etc. is the rotor shaft. It is transmitted to 4 and efficiently conducted from the rotor shaft 4 to the signal-detected unit 41. Since the signal detected unit 41 is exposed to the outside air, the heat transferred to the signal detected unit 41 can be efficiently released to the outside air.

Further, since the signal detection unit 42 of the rotation position sensor 40 is formed or mounted on the same substrate as the control board 240 in which the control circuit housed in the resin case 241 of the control circuit unit 24 is formed, the signal is signaled. It is possible to shorten the length of wiring from the detection unit 42 to a component (for example, a microcomputer, an ASIC, an A / D converter, an operational amplifier, etc.) that receives a signal. By shortening the length of the wiring, it is possible to prevent disturbance from the outside of the rotation position sensor 40 from being superimposed on the detection signal output from the signal detection unit 42, and to prevent the angle detection accuracy from being lowered. As a result, highly accurate angle detection becomes possible even in a special environment such as a motor generator with an integrated control device, which has a large amount of disturbance outside the rotation position sensor 40. Further, since the control board 240 is housed in the resin case 241, it is possible to prevent dust from entering the inside of the control circuit unit 24.

Embodiment 2
Next, the controller-integrated rotary electric machine according to the second embodiment of the present application will be described with reference to FIG.
3A and 3B are schematic external views showing a signal-detected portion 41 of the rotation position sensor 40 used in the second embodiment, FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along the line AA'. Is.
The rotation position sensor 40 of the second embodiment includes a signal transmitting unit in which the signal detecting unit 42 has a coil shape, and a signal receiving unit in which the magnetic flux generated from the signal transmitting unit is reflected by the signal receiving unit 41 and received. It is an electromagnetic induction sensor.

As the signal detected unit 41 of the rotation position sensor 40 of the rotary electric machine integrated with the control device shown in FIG. 1, as shown in FIG. 3, the signal for detecting the rotation output from other than the detected unit is used as the rotation of the rotor 6. The signal shielding unit 41a having a function of switching whether or not to shield in synchronization is provided.
In this configuration, whether or not the rotation detection signal is blocked by the signal shielding unit 41a by rotating the signal shielding unit 41a provided in the signal detected unit 41 of the rotation position sensor 40 in synchronization with the rotation of the rotor 6. It is configured to detect the rotation position with.

Therefore, in addition to the configuration in which the leakage flux emitted from the field winding 62 shown in the first embodiment is sufficiently damped when it reaches the rotation position sensor 40, the signal shielding portion 41a itself rotates. Since the rotation position is detected depending on whether or not the signal output from the portion other than the signal shielding portion 41a is blocked without emitting the detection signal, the influence of the leakage flux can be further avoided. Therefore, it is not necessary to dispose an insulating member such as resin between the rotor shaft 4 and the signal shielding portion 41a, and the product size in the longitudinal direction of the rotor shaft 4 of the rotary electric machine integrated with the control device increases. This can be prevented and the accuracy of detecting the rotation position can be further improved. Alternatively, the rotation position can be detected accurately even in a more harsh environment.

The signal shielding portion 41a of the rotation position sensor 40 is made of metal and is arranged so that the signal shielding portion 41a is in direct contact with the rotor shaft 4. As a result, the signal shielding portion 41a and the rotor shaft 4 are directly connected to each other by high-strength metals. Therefore, even when a large rotational acceleration with high fixing strength acts on the signal shielding portion 41a, the signal shielding portion 41a The position does not shift, and it is possible to avoid a decrease in the rotation position detection accuracy. Further, since the rotor shaft 4 to the signal shielding portion 41a do not include an insulating member such as a resin having a low thermal conductivity, the heat generated by the brush 9, the slip ring 7, the field winding 62, etc. is generated by the rotor shaft 4 Is efficiently conducted from the rotor shaft 4 to the signal shielding portion 41a. Since the signal shielding portion 41a rotates, the heat transferred to the signal shielding portion 41a can be efficiently released to the outside air.

Further, since the signal shielding portion 41a is made of metal and is rotated and cooled in synchronization with the rotation of the rotor shaft 4, it is possible to prevent the temperature of the signal shielding portion 41a itself from rising excessively. As a result, the shape does not change due to expansion and contraction of the signal shielding portion 41a, which affects the rotation position detection caused by a large change in the temperature of the signal shielding portion 41a, and it is possible to avoid a decrease in the detection accuracy of the rotating position. ..

The signal shielding portion 41a of the rotation position sensor 40 may be made of a non-magnetic metal. For example, by being composed of non-magnetic metals such as copper, aluminum, stainless steel and alloys based on these, leakage flux generated by energizing the field winding 62, current pulsation of field current, etc. A shielding effect can be obtained to prevent the noise caused by the above from being emitted to the control board 240 side of the control circuit unit 24. As a result, it is not necessary to arrange the shield again, and it is possible to reduce the size and weight of the rotary electric machine integrated with the control device.

As shown in FIG. 3, the signal shielding portion 41a of the rotation position sensor 40 includes a propeller-shaped blade portion. Therefore, the signal shielding portion 41a can be formed by punching a metal flat plate by press working or the like, and can be formed at low cost and with high accuracy. For mounting on the rotor shaft 4, a mounting hole formed in the center of rotation of the signal shielding portion 41a is screwed, press-fitted, caulked, or the like to the rotor shaft 4. Further, since the propeller-shaped signal shielding portion 41a is attached to the end of the rotor shaft 4, an air flow can be generated inside the power conversion circuit portion 22, and the brush 9, the slip ring 7, and the control circuit portion 24 can be generated. The temperature can be reduced.

The number of propeller-shaped blades of the signal shielding portion 41a of the rotation position sensor 40 is installed in multiples of 2, and the center lines of the blades having the rotation center of the signal shielding portion 41a as one end of each pair of blades are connected to each other. Is arranged at a position rotated 180 degrees with respect to the rotation center of the signal shielding portion 41a. As a result, the centrifugal force acting on the blade portion when rotating is canceled, and the blade portion of the signal shielding portion 41a fluctuates in the longitudinal direction of the rotor shaft 4 during rotation or is eccentric with respect to the rotor shaft 4. It can be avoided even at high speed rotation, and the deterioration of the detection accuracy of the rotation position can be prevented. Further, the angle α1 of the portion where the blade portion is installed and the angle α2 of the portion where the blade portion is not installed are arranged so as to be substantially the same with respect to the rotation center of the signal shielding portion 41a. By setting α1 = α2, the period during which the signal for detecting the rotation position is shielded and the period during which the signal for detecting the rotation position is not shielded becomes equal to the signal detection unit 42 of the rotation position sensor 40, and the detection accuracy is improved.

The field iron core 61 of the rotor 6 is a claw-shaped claw pole that becomes a magnetic pole when the field winding 62 is energized, and the number of blades of the signal shielding portion 41a sandwiches the field winding 62. It is formed so as to be the same as the number of pole pairs of the magnetic poles of the claw poles provided in pairs. Since the number of pole pairs of the magnetic poles of the claw pole and the number of blades of the signal shielding portion 41a of the rotation position sensor 40 are the same, the change in the rotation position detected by the rotation position sensor 40 and the magnetic pole of the claw pole with respect to the armature winding 32 The change in the rotation position of the pair of poles is the same, and the internal processing step can be omitted when the angle detected by the rotation position sensor 40 is used in the control circuit unit 24. As a result, the components and wiring patterns of the control board 240 of the control circuit unit 24 can be simplified.

Embodiment 3.
Next, the controller-integrated rotary electric machine according to the third embodiment of the present application will be described with reference to FIG.
FIG. 4 is a schematic cross-sectional view showing the end of the rotor shaft including the signal shielding portion 41a of the rotation position sensor 40 used in the third embodiment.
In FIG. 4, the signal shielding portion 41a of the signal receiving portion 41 is formed so that the diameter A of the signal shielding portion 41a and the diameter B of the rotor shaft 4 are A ≦ B. The configuration is the same as that of the first and second embodiments except for the configuration of the signal shielding unit 41a.

With such a configuration, the diameter A of the signal shielding portion 41a becomes equal to or less than the diameter B of the rotor shaft 4 when assembling the rotary electric machine integrated with the control device. The slip ring 7 attached to the rotor shaft 4, the brush 9 in contact with the slip ring 7, and the brush holder 8 are formed in a shape that surrounds the rotor shaft 4, and the axial end portion of the rotor shaft 4 in the longitudinal direction. Is inserted from. By configuring the signal shielding portion 41a in the third embodiment, the order of attaching the signal shielding portion 41a can be before or after attaching the brush 9, the brush holder 8, and the slip ring 7, and the degree of freedom of assembly is improved. As a result, the signal shielding portion 41a can be set at the beginning of the assembly process of the rotor 6, that is, before the brush 9, the brush holder 8, and the slip ring 7 are arranged, so that the field core 61 of the claw pole can be set. Since there are no obstacles when the relative position of the signal shielding portion 41a is to be installed with high accuracy, the degree of freedom for setting the position accuracy is high, and the detection accuracy is improved.

Embodiment 4.
Next, the controller-integrated rotary electric machine according to the fourth embodiment of the present application will be described with reference to FIG.
FIG. 5 is a schematic cross-sectional view showing the end of the rotor shaft including the signal shielding portion 41a according to the fourth embodiment. In FIG. 5, in the signal shielding portion 41a of the signal receiving portion 41, the signal shielding portion 41a is formed at the end of the rotor 6 as a part of the rotor shaft 4. The signal shielding portion 41a is formed by forming the end portion of the rotor shaft 4 by machining such as cutting, abrasive grain processing, pressing processing, forging processing, rolling processing, or the like. The configuration is the same as that of the first embodiment except for the configuration of the signal shielding unit 41a.

With this configuration, the relative position of the rotor shaft 4 and the signal shielding portion 41a, signal detection, rather than forming the signal shielding portion 41a of the signal detected portion 41 as a separate component and attaching it to the rotor shaft 4. The relative positional deviation between the unit 42 and the signal shielding unit 41a can be reduced. In addition, correction of misalignment is not required in the manufacturing process, and the mounting process is not required, which facilitates manufacturing. Further, the mounting hole arranged at the center of rotation of the signal shielding portion 41a becomes unnecessary, the effective area of the blade portion that exerts the signal shielding action is improved, and the detection accuracy and the detection reliability are improved. Alternatively, the effective area of the blade portion that exerts the signal shielding action can be improved, and the diameter of the signal shielding portion 41a can be reduced.

Embodiment 5.
Next, the controller-integrated rotary electric machine according to the fifth embodiment of the present application will be described with reference to FIG.
FIG. 6 is a schematic cross-sectional view showing the end of the rotor shaft including the signal shielding portion 41a according to the fifth embodiment. In FIG. 6, a molded part of the slip ring 7 that supplies an electric current from the brush 9 to the field winding 62 is provided at the end of the rotor shaft 4, and the signal shielding portion 41a is integrated with the end of the molded part of the slip ring 7. It is molded. The configuration is the same as that of the first and second embodiments except for the configuration of the signal shielding unit 41a.

Since the signal shielding portion 41a is integrally molded with the end portion of the molded part of the slip ring 7, the signal shielding portion 41a can be installed at the same time when the slip ring 7 is incorporated in the manufacturing process, which facilitates manufacturing. The mounting hole arranged at the center of rotation of the signal shielding portion 41a becomes unnecessary, the effective area of the blade portion that exerts the signal shielding action is improved, and the detection accuracy and detection reliability are improved. Alternatively, the effective area of the blade portion that exerts the signal shielding action can be improved, and the diameter of the signal shielding portion 41a can be reduced. The signal shielding portion 41a integrally molded with the molded part of the slip ring 7 and the rotor shaft 4 are arranged so as to be in direct contact with each other.

Embodiment 6.
Next, the controller-integrated rotary electric machine according to the sixth embodiment of the present application will be described with reference to FIG.
FIG. 7 is a schematic cross-sectional view showing the end of the rotor shaft including the signal shielding portion 41a according to the sixth embodiment. In FIG. 7, the signal shielding portion 41a is provided with a protrusion 41b in the longitudinal direction of the rotor shaft 4 of the propeller-shaped blade portion, and the signal shielding portion 41a is provided with a structure for expressing the flow of wind by rotating. The configuration is the same as that of the first and second embodiments except for the configuration of the signal shielding unit 41a.

With such a configuration, since the signal shielding portion 41a exerts an effect like a fan, the generation of the air flow inside the power conversion device can be more strongly promoted, and the brush 9, the slip ring 7, and the control can be controlled. The temperature of the circuit unit 24 and the like can be reduced. Further, the wear debris of the brush 9 is discharged from the inside of the brush holder 8 by the flow of air, and the molded parts of the slip ring 7 and the rotor shaft 4 are short-circuited due to the accumulation of the wear debris, and the pair of slip rings 7 are short-circuited with each other. Can be prevented. As a result, it is possible to prevent the temperature of the signal shielding portion 41a from rising excessively, and the shape change due to expansion and contraction of the signal shielding portion 41a that affects the rotation position detection caused by a large change in the temperature of the signal shielding portion 41a. Is not generated, and it is possible to avoid a decrease in the rotation position detection accuracy.

Embodiment 7.
Next, the controller-integrated rotary electric machine according to the seventh embodiment of the present application will be described with reference to FIG.
FIG. 8 is a schematic cross-sectional view showing the end of the rotor shaft including the signal shielding portion 41a according to the seventh embodiment. In FIG. 8, the signal shielding portion 41a is formed of the substrate 41c and the metal pattern 41d formed in the substrate. The configuration is the same as that of the first and second embodiments except for the configuration of the signal shielding unit 41a.

With such a configuration, the mounting hole arranged at the center of rotation of the signal shielding portion 41a becomes unnecessary, the effective area of the blade portion that exerts the signal shielding action is improved, and the detection accuracy and detection reliability are improved. Improves sex. Alternatively, the effective area of the blade portion that exerts the signal shielding action can be improved, and the diameter of the signal shielding portion 41a can be reduced.

Although the present disclosure describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1: Front bracket (housing) 2: Rear bracket (housing),
3: Stator, 31: Stator core, 32: Armature winding (stator winding), 4: Rotor shaft,
6: Rotor, 61: Field iron core, 62: Field winding, 7: Slip ring,
8: Brush holder, 9: Brush, 22: Power conversion circuit (power conversion device),
23: Field circuit section, 24: Control circuit section, 40: Rotation position sensor,
41: Signal detected part, 41a: Signal shielding part, 41b: Projection, 41c: Substrate,
41d: metal pattern, 42: signal detector, 240: control board, 241: resin case,
100: rotary electric machine, 200: control device (power conversion device).

Claims (14)

A rotor shaft rotatably supported by the housing, a rotor having a field winding and a field iron core fixed to the rotor shaft and controlled by energization via a brush, and a rotor shaft fixed to the housing. In addition, a stator having an armature winding that is energized and controlled by a power conversion circuit unit controlled by the control circuit unit, and the power conversion circuit unit and the control that are arranged on one end side in the longitudinal direction of the rotor shaft. It is composed of a power conversion device having a circuit unit, a signal detection unit and a signal detection unit, and includes a rotation position sensor that detects the position of the rotor.
The control circuit unit is arranged on the side opposite to the field winding and the armature winding with respect to the brush, and the signal detection unit of the rotation position sensor is formed on the same substrate as the control substrate of the control circuit unit. Alternatively, the signal-detected portion of the rotation position sensor is arranged so as to be in direct contact with the end portion of the rotor shaft on the control circuit portion side, and the control board controls energization of the field winding. A control device in which a semiconductor control element constituting a field circuit is mounted, and a signal wiring for energizing and controlling the semiconductor control element by the control circuit unit is composed of a pattern wiring of the control board. Body type rotary electric machine. The control device integrated rotary electric machine according to claim 1, wherein the control circuit unit includes a resin case having a waterproof structure for accommodating a control board. The signal-detected unit of the rotation position sensor is provided with a signal shielding unit having a function of switching whether or not to shield signals output from other than the signal-detected unit in synchronization with the rotation of the rotor. The control device integrated rotary electric machine according to claim 1 or 2 . The controller-integrated rotary electric machine according to claim 3 , wherein the signal shielding portion of the rotation position sensor is made of metal, and the signal shielding portion is arranged so as to be in direct contact with the rotor shaft. The controller-integrated rotary electric machine according to claim 3 , wherein the signal shielding portion of the rotary position sensor is made of a non-magnetic metal. The controller-integrated rotary electric machine according to any one of claims 3 to 5 , wherein the signal shielding portion of the rotation position sensor includes a propeller-shaped blade portion. The number of propeller-shaped blades of the signal shielding portion of the rotation position sensor is installed in multiples of 2, and each pair of blades is centered on the blades having the rotation center of the signal shielding as one end. The controller-integrated rotary electric machine according to claim 6 , wherein is arranged at a position rotated by 180 degrees with respect to the rotation center of the signal shielding portion. The angle α1 of the portion where the blade portion is installed and the angle α2 of the portion where the blade portion is not installed are the same angle with respect to the rotation center of the signal shielding portion of the rotation position sensor. The control device integrated rotary electric machine according to claim 6 or 7 . Claims 6 to 8 include a claw pole in which the rotor is a claw-shaped magnetic pole, and the number of blades of the signal shielding portion is the same as the number of pole pairs of the claw-shaped magnetic pole of the claw-shaped magnetic pole. The control device integrated rotary electric machine according to any one of the items. The method according to any one of claims 3 to 9 , wherein the diameter A of the signal shielding portion of the rotation position sensor and the diameter B of the rotor shaft are in a relationship of A ≦ B. Rotating electric machine with integrated control device. The control device according to any one of claims 3 to 10 , wherein a signal shielding portion of the rotation position sensor is formed at an end portion of the rotor as a part of the rotor shaft. Integrated rotary electric machine. A slip ring molded component that supplies an electric current from the brush to the field winding is provided at an end of the rotor shaft on the control circuit portion side, and a signal shielding portion of the rotation position sensor is an end of the slip ring molded component. The controller-integrated rotary electric machine according to any one of claims 3 to 11 , wherein the portion is integrally molded. Any of claims 3 to 12 , wherein the signal shielding portion of the rotation position sensor is provided with a propeller-shaped blade portion, and the blade portion is provided with a protrusion extending in the longitudinal direction of the rotor shaft. The rotary electric machine integrated with a control device according to item 1. The controller-integrated rotary electric machine according to claim 3 , wherein the signal shielding portion of the rotation position sensor is formed of a substrate and a metal pattern formed in the substrate.

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