JP2018078718A - Controller integrated rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller integrated rotary electric machine which can be miniaturized while suppressing a damage of a capacitor element.SOLUTION: A controller integrated rotary electric machine 1 of the present invention is the controller integrated rotary electric machine 1 having: a rotary electric machine 10 with a stator 100 and a rotor 101; and a controller 11 with a control circuit for controlling the rotary electric machine 10. The controller 11 is provided with: a capacitor 112 with an explosion-proof valve 112b; and a case 110 for accommodating a circuit member 111 having a capacitor 112. The case 110 is provided with an accommodation recess 110d in which the capacitor 112 is accommodated, and having an opening 110e in communication with the outside at a position facing the explosion-proof valve 112b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a controller-integrated rotating electrical machine including a capacitor element.

  2. Description of the Related Art Conventionally, a controller-integrated rotating electrical machine that integrally includes a rotating electrical machine and a control device is known. The control device controls the rotating electrical machine. The control device includes, for example, an inverter circuit. The control device has a power module that constitutes an inverter circuit. The inverter circuit has a smoothing capacitor element (for example, an electrolytic capacitor).

In the controller-integrated rotating electrical machine, it is preferable to use an aluminum electrolytic capacitor having a large capacity per volume in order to reduce the size. The aluminum electrolytic capacitor element is provided with an explosion-proof valve, which is opened when the internal pressure becomes higher than a predetermined value due to a change in environmental conditions such as high temperature, and the internal high-pressure gas is extracted. Therefore, the capacitor element is fixed in a state where a space necessary for opening the explosion-proof valve is formed.
An apparatus provided with a capacitor element is described in Patent Documents 1 and 2, for example.

  Patent Document 1 describes a configuration in which a hole having the same diameter as that of the electrolytic capacitor is provided in the standing wall of the case body, and an end of the electrolytic capacitor on the explosion-proof valve side is fitted into this hole.

  Patent Document 2 describes a configuration in which an electrolytic capacitor having an explosion-proof valve at the bottom is inserted into a concave capacitor housing region, and a shrinkable insulator is provided between the electrolytic capacitor and the inner wall surface of the capacitor housing region. ing. At this time, a reservoir space for accumulating the electrolytic solution of the electrolytic capacitor is formed below the explosion-proof valve.

JP 2001-41499 A JP 2008-166303 A

  However, in the configuration described in Patent Document 1, a high dimensional accuracy is required because the end portion of the electrolytic capacitor is fitted into the hole of the standing wall of the case body. If a gap due to a dimensional tolerance or a difference in linear expansion coefficient occurs between the end of the electrolytic capacitor and the hole in the standing wall of the case body, foreign matter passes through this gap. That is, in the configuration described in Patent Document 1, waterproofness and dustproofness are not sufficiently ensured.

  In addition, when vibration is applied in a state where a gap is generated between the end portion of the electrolytic capacitor and the hole of the standing wall of the case body, the electrolytic capacitor repeatedly collides with the case body, and the electrolytic capacitor is damaged.

  Furthermore, when the end face of the electrolytic capacitor on the explosion-proof valve side coincides with the outer peripheral surface of the standing wall of the case body, foreign matter easily collides with the explosion-proof valve, and the electrolytic capacitor is likely to be damaged.

  In the configuration described in Patent Document 2, since a liquid storage space is required at the tip of the explosion-proof valve of the electrolytic capacitor, the overall physique increases (miniaturization is hindered). Further, the processing cost for forming the liquid storage space increases.

Further, the liquid storage space has a sealed structure, and there is a possibility of explosion when the gas ejected from the explosion-proof valve is exposed to a high temperature and expands. In particular, in a control device for a control device-integrated dynamoelectric machine, a circuit board such as an inverter circuit is often sealed with resin, and in such a case, the risk of gas explosion in particular increases.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a controller-integrated rotating electrical machine that can be reduced in size while suppressing damage to a capacitor element.

  A controller-integrated rotating electrical machine of the present invention that solves the above-mentioned problems is a controller-integrated rotating electrical machine having a rotating electrical machine having a stator and a rotor, and a control device having a control circuit for controlling the rotating electrical machine. The control device includes a capacitor element having an explosion-proof valve portion, and a case for accommodating a circuit member having the capacitor element. The case is located at a position facing the explosion-proof valve portion, in which the capacitor element is accommodated. An accommodation recess having an opening communicating with the outside is provided.

According to this configuration, the opening is provided at a position facing the explosion-proof valve portion, and even when the explosion-proof valve portion is opened and gas is blown out, the gas can be discharged from the opening to the outside. That is, there is no danger of the gas blown out from the capacitor element exploding. Further, by discharging the gas to the outside through the opening, it is possible to suppress the blown-out gas from adhering to the terminal of the capacitor element or the circuit board side to which the terminal is fixed. The gas blown out from the capacitor element is a gasification of the electrolyte in the capacitor element. That is, it has conductivity. As a result, it is possible to suppress leakage and short circuit due to adhesion of gas (or electrolyte).
Further, a space (a liquid storage space) for collecting the blown gas is not required. That is, the size of the controller-integrated rotating electrical machine can be reduced.

Furthermore, since the case has an opening communicating with the outside at a position facing the explosion-proof valve portion of the capacitor element, the explosion-proof valve portion exists at a position facing the inner surface of the case. This indicates that the explosion-proof valve portion is not exposed on the outer surface of the case, and foreign matter does not easily collide with the explosion-proof valve portion.
As described above, the controller-integrated rotating electrical machine of the present invention is a controller-integrated rotating electrical machine that can be reduced in size while suppressing damage to the capacitor element.
In the controller-integrated rotating electrical machine of the present invention, it is preferable that a seal member is disposed between the inner peripheral surface of the housing recess and the surface of the capacitor element.

  According to this configuration, when the gas blows out from the explosion-proof valve portion of the seal member, the seal member regulates the gas flow even if the blown-out gas tries to flow toward the terminal of the capacitor element or the circuit board. As a result, it is possible to more reliably suppress electric leakage and short circuit due to gas adhesion. Further, even if a foreign substance enters the inside of the case from the opening, this seal member is restricted from entering further inside.

  Further, the seal member is interposed between the capacitor element and the inner surface of the case, thereby preventing the capacitor element from colliding with the case when the capacitor element vibrates. That is, damage to the capacitor element can be suppressed.

In the controller-integrated dynamoelectric machine of the present invention, it is preferable that the seal member seals between the capacitor element and the housing recess at the periphery of the opening.
According to this configuration, since the seal member is disposed at the peripheral edge of the opening, the gas blown out from the explosion-proof valve does not flow to the terminal of the capacitor element or the circuit board.

The controller-integrated rotating electrical machine of the present invention preferably has a columnar main body, and is provided with an explosion-proof valve portion on the axial center side from the outer edge portion of one end face in the axial direction of the main body portion.
According to this structure, the conventional electrolytic capacitor which has an explosion-proof valve part in one end surface can be used for a capacitor | condenser element. In addition, by providing the explosion-proof valve portion at the axial center of one end surface of the main body portion of the capacitor element, the explosion-proof valve portion is positioned in the assembly direction of the capacitor element, and alignment with the opening portion is facilitated.

In the controller-integrated rotating electrical machine of the present invention, the capacitor element is provided on the end surface of the main body part, the axial direction of the main body part being provided in parallel with the axial direction of the rotating electrical machine, and the explosion-proof valve part being separated from the rotating electrical machine. It is preferable.
According to this configuration, the capacitor element can be arranged along the axial direction of the rotating electrical machine, and can be easily assembled.

In the controller-integrated rotating electrical machine of the present invention, it is preferable that the capacitor element has a columnar main body portion, and an explosion-proof valve portion is provided on the outer circumferential surface of the main body portion in the circumferential direction.
According to this configuration, a conventional electrolytic capacitor having an explosion-proof valve portion on the side surface can be used for the capacitor element.

In the controller-integrated rotating electrical machine of the present invention, it is preferable that the opening has a closing member that closes the opening, and the closing member opens the opening when the explosion-proof valve portion opens.
According to this structure, it can suppress reliably that a foreign material penetrate | invades into the inside of a case from the outside because a closure member obstruct | occludes an opening part.

In the controller-integrated rotating electrical machine of the present invention, it is preferable that a cover is provided on the outer surface of the housing recess to cover the opening with a gap.
According to this configuration, even when the explosion-proof valve portion is opened and gas is blown out from the opening to the outside of the case, it is possible to prevent the gas from being scattered outside the case. Here, since the cover is provided outside the case, even if gas blows out from the capacitor element, it is not exposed to high heat. For this reason, the gas blown into the cover does not explode.

It is sectional drawing which shows the structure of the rotary electric machine of 1st Embodiment. It is a rear view of the rotary electric machine of 1st Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser vicinity of the rotary electric machine of 1st Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser vicinity of the rotary electric machine of 2nd Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser vicinity of the rotary electric machine of 3rd Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser vicinity of the rotary electric machine of 4th Embodiment. It is sectional drawing which shows the structure of the capacitor | condenser vicinity of the rotary electric machine of 5th Embodiment.

  Hereinafter, the present invention will be described in more detail using embodiments. In the embodiment, an example in which the rotating electrical machine according to the present invention is applied to a controller-integrated rotating electrical machine mounted on a vehicle will be described.

[First Embodiment]
The configuration of the controller-integrated rotating electrical machine of this embodiment will be described with reference to FIGS.
As shown in the cross-sectional view of FIG. 1, the controller-integrated rotating electrical machine 1 of the present embodiment is mounted on a vehicle and generates power for driving the vehicle by being supplied with electric power from a battery. It is. Moreover, it is also a device that generates electric power for charging the battery by supplying driving force from the engine of the vehicle. The controller-integrated rotating electrical machine 1 includes a rotating electrical machine 10 and a control device 11.

  In this embodiment, the axial direction indicates a direction in which the rotating shaft 102 of the rotor 101 of the rotating electrical machine 10 extends (and a direction parallel thereto). As shown in FIG. 1, the front in the longitudinal direction in the axial direction indicates the direction from the control device 11 to the rotating electrical machine 10 in the axial direction, and the backward in the longitudinal direction in the axial direction is controlled from the rotating electrical machine 10 in the axial direction. The direction towards the device 11 is shown. The radial direction indicates the radial direction of the rotor 101. The radial direction is also a direction perpendicular to the axial direction.

(Rotating electric machine)
The rotating electrical machine 10 is a device that generates a driving force for driving a vehicle by being supplied with electric power. Moreover, it is also a device that generates electric power for charging the battery by supplying driving force from the engine. The rotating electrical machine 10 includes a stator 100, a rotor 101, and a housing 104.

  The stator 100 is a member that forms part of a magnetic path and generates magnetic flux when electric power is supplied. Specifically, it is a member that generates magnetic flux when AC is supplied. Further, it is a member that generates alternating current by interlinking with the magnetic flux generated by the rotor 101. The stator 100 includes a stator core 100a and an armature winding 100b.

  The stator core 100a is an annular member made of a magnetic material that constitutes a part of the magnetic path and holds the armature winding 100b. Although not shown, the stator core 100a includes a plurality of slots for accommodating the armature windings 100b.

  The armature winding 100b is a member that generates magnetic flux when AC is supplied. Further, it is a member that generates alternating current by interlinking with the magnetic flux generated by the rotor 101. The armature winding 100b includes two sets of Y-connected three-phase windings. The armature winding 100b is housed and held in the slot of the stator core 100a.

  The rotor 101 is a member that forms part of a magnetic path and generates magnetic flux when electric power is supplied. Specifically, it is a member that generates magnetic flux when DC is supplied. The rotor 101 generates a rotational force by interlinking with the magnetic flux generated by the armature winding 100b. Further, the generated magnetic flux is linked to the armature winding 100b by rotating by the driving force supplied from the engine of the vehicle, and the armature winding 100b generates an alternating current. The rotor 101 includes a rotor core 101a, a field winding 101b, a fan 101c, and a rotating shaft 102.

  The rotor core 101a is a member made of a magnetic material that constitutes a part of the magnetic path and holds the field winding 101b. This is a so-called Landel-type pole core. The rotor core 101a includes an annular hollow portion 101d that accommodates the field winding 101b. Moreover, the through-hole part 101e fixed with the rotating shaft 102 inserted is provided.

  The field winding 101b is a member that generates magnetic flux when supplied with direct current and forms magnetic poles on the outer peripheral surface of the rotor core 101a. The field winding 101b is accommodated and held in an annular hollow portion formed in the rotor core 101a.

The fan 101 c is a member that is provided in the rotor core 101 a and causes the air outside the controller-integrated rotating electrical machine 1 to flow inside the rotating electrical machine 10 and the controller 11 by rotating together with the rotor core 101 a. The fans 101c are provided on the front end surface and the rear end surface of the rotor core 101a, respectively.
The rotor 101 is provided in a state where the outer peripheral surface of the rotor core 101a is opposed to the inner peripheral surface of the stator core 100a with a predetermined interval.

  The rotating shaft 102 is a cylindrical member that is fixed to the rotor core 101a and rotatably supported by the housing 104, and rotates together with the rotor core 101a. The rotating shaft 102 is fixed to the rotor core 101a at the center in the axial direction while being inserted through the through hole 101e of the rotor core 101a. The rotating shaft 102 includes a slip ring 102a.

  The slip ring 102a is a cylindrical member made of a metal that supplies a direct current to the field winding 101b. The slip ring 102a is fixed to the outer peripheral surface of the rear end portion of the rotating shaft 102 via an insulating member 102b, and is connected to the field winding 101b via a wiring member.

  The housing 104 is a member that covers both ends of the stator core 100 and the rotor core 101a of the rotor 101 in the axial direction and supports the rotating shaft 102 rotatably. It is also a member to which the control device 11 is fixed. The housing 104 includes a front housing 104a and a rear housing 104b.

  The front housing 104a is a member that covers the front end of the rotor core 101a of the stator 100 and the rotor 101 in the axial direction and rotatably supports the front side of the rotating shaft 102. The front housing 104a includes a bottom portion 104c and a peripheral wall portion 104d. Through holes are respectively formed in the bottom 104c and the peripheral wall 104d. The front housing 104a has a peripheral wall portion 104d fixed to the front end portion of the stator core 100a so as to cover the front end portions in the axial direction of the rotor core 101a of the stator 100 and the rotor 101. Further, the front side of the rotating shaft 102 is rotatably supported via a bearing 104e with the front end portion of the rotating shaft 102 protruding forward.

  The rear housing 104b is a member that covers the rear end portion in the axial direction of the rotor core 101a of the stator 100 and the rotor 101 and rotatably supports the rear side of the rotating shaft 102. It is also a member to which the control device 11 is fixed. The rear housing 104b includes a bottom portion 104f and a peripheral wall portion 104g. Through holes are formed in the bottom 104f and the peripheral wall 104g, respectively. The rear housing 104b has a peripheral wall portion 104g fixed to the rear end portion of the stator core 100a so as to cover the rear end portions in the axial direction of the rotor core 101a of the stator 100 and the rotor 101. Further, the rear side of the rotary shaft 102 is rotatably supported via a bearing 104h with the rear end portion of the rotary shaft 102 protruding rearward.

  The rotation angle detection magnet is a member that generates a magnetic field for detecting the rotation angle of the rotor 101. The rotation angle detection magnet is fixed to the rear end portion in the axial direction of the rotation shaft 102 while being held or accommodated in the magnet holder.

(Control device)
The control device 11 is a device that controls electric power supplied from the battery to the rotating electrical machine 10 in order to cause the rotating electrical machine 10 to generate a driving force. Moreover, in order to charge a battery, it is also an apparatus which converts the electric power which the rotary electric machine 10 generated, and supplies it to a battery.

  The control device 11 includes a case 110, a wiring board 111, a capacitor 112, an inverter circuit 113, a field circuit 114, a brush 115, and a control circuit 116, as shown in a sectional view in FIG. Yes. As shown in the rear view in FIG. 2, the control device 11 is provided on the rear side of the rotating electrical machine 10.

The case 110 is a box-shaped member that is provided at the rear end portion in the axial direction of the rear housing 104 b and is made of resin that houses the wiring board 111, the inverter circuit 113, the field circuit 114, the brush 115, and the control circuit 116. Also, a bus bar (not shown) is fixed.
The case 110 includes a main body 110a and a lid 110b.

  The main body 110a is a member that fixes the inverter circuit 113, the field circuit 114, and the control circuit 116, and holds the brush 115 movably in the radial direction. It is also a member for fixing a bus bar (not shown). The main body 110a includes a through hole 110c at the center. The main body 110a is fixed to the rear end of the rear housing 104b in the axial direction. The radial direction is a direction along a plane orthogonal to the rotational axis of the rotating electrical machine 10 and is a direction approaching or moving away from the rotational axis.

  The lid part 110b is a member that covers the rear side of the main body part 110a. The lid part 110b includes a bottom part and a peripheral wall part. In the peripheral wall portion, an opening is formed in a portion facing a fin portion 117b of a heat sink 117 described later. The lid portion 110b has a housing recess 110d that is accommodated in a capacitor 112 described later.

  The housing recess 110d has an opening 110e formed in a portion of the capacitor 112 that faces the explosion-proof valve 112b.

  The opening 110e is formed through the bottom of the housing recess 110d, and communicates the inside and the outside of the housing recess 110d. The gas blown out from an explosion-proof valve 112b of the capacitor 112, which will be described later, passes through the opening 110e. The opening 110e is formed to have a larger diameter than an explosion-proof valve 112b of the capacitor 112 described later.

  The wiring substrate 111 is a substrate on which the inverter circuit 113, the field circuit 114, and the control circuit 116 are mounted. It is also a plate-like internal wiring board for wiring between these circuits 113, 114, and 116. The wiring substrate 111 has a wiring pattern formed on the surface and the inner layer.

  The wiring substrate 111 corresponds to a circuit member, and has a substantially U shape that is housed and fixed in the case 110 so as to surround the brush holder portion at a distance. The rear housing 104b and the inverter circuit 113 are spaced apart from each other at a position on the front side in the axial direction from the inverter circuit 113. The wiring board 111 has a surface covered with a resin 110f, and the inverter circuit 113 and the control circuit 116 are sealed in the case 110 with the resin 110f.

  The wiring board 111 has a capacitor 112 mounted on U-shaped end portions (specifically, both end portions). In this embodiment, one capacitor 112 is mounted on each end of the U-shaped wiring board 111 (two in total are mounted). Note that the number of capacitors 112 is not limited to one, and a plurality of capacitors 112 may be mounted. When increasing the number of capacitors 112 mounted, it is preferable to mount a plurality of capacitors 112 at each end. In this case, it is preferable to provide an opening 110e corresponding to each capacitor 112.

  The capacitor 112 corresponds to a capacitor element, and is interposed between the positive terminal and the negative terminal of the power source, that is, between the positive power terminal and the negative power terminal of each switching element module 113a. That is, one terminal of the capacitor 112 is connected to the positive terminal side of the power source, and the other terminal of the capacitor 112 is connected to the negative terminal side of the power source. The capacitor 112 is provided to smooth the voltage in the inverter circuit 113.

  The capacitor 112 is made of an aluminum electrolytic capacitor having a main body 112a formed in a substantially cylindrical shape. The capacitor 112 has an explosion-proof valve 112b on one end face in the axial direction of the main body 112a. The explosion-proof valve 112b corresponds to an explosion-proof valve part. A terminal 112 c protrudes from the other end surface in the axial direction of the main body 112 a and is connected to the wiring board 111. The explosion-proof valve 112b of the capacitor 112 opens when the internal pressure of the capacitor 112 increases due to abnormal heat generation or the like. The explosion-proof valve 112b of the capacitor 112 is provided inside the peripheral portion (that is, the shaft core portion) on one end face.

  As shown in FIG. 3, the capacitor 112 is mounted on the wiring board 111 in a state where the axial direction of the main body 112 a is parallel to the axial direction of the rotating shaft 102 of the rotating electrical machine 10. At this time, the explosion-proof valve 112b is provided on the rear end face (that is, the end face away from the rotating electrical machine 10).

  The capacitor 112 mounted on the wiring substrate 111 is accommodated in the accommodating recess 110d of the lid 110b with the explosion-proof valve 112b facing the opening 110e. A seal member 118 is disposed between the peripheral edge of the capacitor 112 and the peripheral edge of the opening 110e of the housing recess 110d.

  The seal member 118 is interposed between the capacitor 112 and the housing recess 110d, seals between the two, and restricts the passage of foreign matter. Further, the collision between the capacitor 112 and the housing recess 110d is prevented. The seal member 118 is formed of rubber, elastomer, plastic resin, or the like.

  The inverter circuit 113 is a circuit that supplies alternating current to the armature winding 100b. It is also a circuit that converts alternating current supplied from the armature winding 100b into direct current. The inverter circuit 113 includes three switching element modules 113a in a state along the circumferential direction of the rotating shaft 102 as shown in FIG. The three switching element modules 113 a are also along the U shape of the U-shaped wiring board 111. The inverter circuit 113 is accommodated in the case 110 and is provided at a distance from the rear housing 104b.

  Since the armature winding 100b is constituted by two sets of three-phase windings, the inverter circuit 113 is constituted by two sets of three-phase inverters. Since the three-phase inverter is constituted by six inverter switching elements, the inverter circuit 113 is constituted by twelve inverter switching elements.

  The switching element module 113 a is an element in which four inverter switching elements are integrated among the inverter switching elements constituting the inverter circuit 113.

The switching element module 113 a is a module having four switching elements among the switching elements constituting the inverter circuit 113. Specifically, it is a module having two sets of two switching elements connected in series.
The configuration of the switching element module 113a is not limited, and the switching element module 113a has a configuration in which the switching element is covered with resin (resin-molded).
The switching element is an element made of a semiconductor. Specifically, it is an element made of a semiconductor constituting an FET.
The switching element module 113 a is disposed on the back side of the wiring board 111.

The heat sink 117 is a member that is provided for each switching element module 113a and is made of a metal that dissipates heat generated by the inverter switching element in the switching element module 113a. The heat sink 117 includes a main body portion 117a and a fin portion 117b.
The main body 117a is a rectangular plate portion. The fin portion 117b is a thin plate-like portion formed on the one surface side of the main body portion 117a at a predetermined interval.

  The heat sink 117 exposes the other surface of the main body 117a to the rotating electrical machine side at a position spaced apart from the rear housing 104b, and exposes the fin part 117b to the counter rotating electrical machine side (or the rear side in the axial direction). In the state, it is insert-molded in the main body 110a of the case 110. The switching element module 113 a is in contact with the heat sink 117 on the rotating electrical machine side of the heat sink 117. That is, the heat sink 117 is in contact with the inverter switching element on the counter-rotating electric machine side of the inverter switching element. The switching element module 113a and the heat sink 117 are arranged adjacent to each other with a distance in the circumferential direction.

The inverter circuit 113 is connected to a bus bar for mounting on the wiring board 111. The bus bar is a member made of a metal used for wiring connected to the inverter circuit 113. The bus bar is insert-molded in the main body 110a of the case 110 in a state where a connection portion connected to the inverter circuit 113 is exposed.
The inverter circuit 113 is also connected to an armature winding bus bar made of metal for wiring the switching element module 113a to the armature winding 100b.

  The field circuit 114 is a circuit that supplies a direct current to the field winding 101b. The field circuit 114 includes a field switching element 114a. The field switching element 114 a is provided in contact with the wiring substrate 111.

The brush 115 is a member that supplies direct current from the field circuit 114 to the field winding 101b via the slip ring 102a. The brush 115 is accommodated in the case 110. Specifically, it is held by a brush holder provided at the center of the main body 110a. The rear housing 104b, the inverter circuit 113, and the control circuit 116 are spaced apart from each other.
The control circuit 116 is a circuit that controls the inverter circuit 113 and the field circuit 114. The control circuit 116 includes electronic components that constitute the control circuit.

(Operation of controller-integrated rotating electrical machine)
The operation of the control apparatus-integrated dynamoelectric machine 1 of this embodiment will be described.
First, an operation when generating a driving force for driving the vehicle will be described.

  When the ignition switch of the vehicle is turned on, direct current is supplied to the switching element module 113a of the inverter circuit 113 through a bus bar or the like. Further, direct current is supplied to the field circuit 114 and the control circuit 116 via other wiring bus bars and the wiring substrate 111.

  When the direct current is supplied, the field circuit 114 and the control circuit 116 start operation. The control circuit 116 controls the inverter circuit 113 and the field circuit 114 based on an externally input command or the like. The field circuit 114 is controlled by the control circuit 116, and supplies direct current to the field winding 101b via the brush 115 and the slip ring 102a. The inverter circuit 113 is controlled by the control circuit 116, converts the direct current supplied via the bus bar or the like into alternating current, and supplies the alternating current to the armature winding 100b via the armature winding bus bar or the like. As a result, the rotating electrical machine 10 generates a driving force to drive the vehicle.

At this time, a rotation angle detection element (not shown) detects the rotation state of the rotor 101 and the rotation shaft 102. The obtained rotation state is used by the control circuit 116 to control the rotation of the controller-integrated rotating electrical machine 1.
Next, an operation when generating electric power for charging the battery will be described.

  When the driving force is supplied from the engine, the armature winding 100b generates an alternating current. The control circuit 116 stops the switching of the inverter switching element of the switching element module 113a. The diode formed in the inverter switching element converts the alternating current supplied from the armature winding 100b via the armature winding bus bar or the like into direct current and supplies the direct current to the battery. As a result, the battery is charged with the electric power generated by the rotating electrical machine 10.

  By detecting the rotation of the rotor 101 and the rotating shaft 102 by the driving force from the engine, the switching of the inverter switching element can be stopped.

(Effect of this embodiment)
The controller-integrated rotating electrical machine 1 according to this embodiment includes a controller-integrated rotating machine including a rotating electrical machine 10 including a stator 100 and a rotor 101, and a controller 11 including a control circuit that controls the rotating electrical machine 10. Electric machine 1. The control device 11 includes a capacitor 112 having an explosion-proof valve 112b and a case 110 that houses a wiring board 111 having the capacitor 112. The case 110 includes an accommodation recess 110d having an opening 110e communicating with the outside at a position facing the explosion-proof valve 112b, in which the capacitor 112 is accommodated.

  The controller-integrated dynamoelectric machine 1 of this embodiment is provided with an opening 110e at a position facing the explosion-proof valve 112b. Even if the explosion-proof valve 112b is opened (or opened) due to an abnormality of the capacitor 112 and gas is blown out, it is blown to the opening 110e and is discharged to the outside of the case 110 through the opening 110e. Thus, gas does not blow out from the capacitor 112 into a narrow sealed space. As a result, there is no danger of the gas exploding.

In addition, the gas from the capacitor 112 is blown to the opening 110e and released to the outside of the case 110. This prevents the blown gas from adhering to the terminals of the capacitor 112 and the wiring substrate 111 to which the terminals are connected. It is done. As a result, it is possible to suppress electric leakage and short circuit due to gas adhesion.
Further, a space (a liquid storage space) for collecting the blown gas is not required. That is, the physique of the controller-integrated rotating electrical machine 1 can be reduced in size.

Further, the case 110 has an opening 110e communicating with the outside at a position facing the explosion-proof valve 112b of the capacitor 112. In this configuration, the explosion-proof valve 112 b exists at a position facing the inner surface of the case 110. This indicates that the explosion-proof valve 112b is not exposed on the outer surface of the case 110, and foreign matter outside the case 110 is less likely to collide with the explosion-proof valve 112b.
As described above, the controller-integrated dynamoelectric machine 1 of this embodiment is a controller-integrated dynamoelectric machine 1 that can be reduced in size while suppressing damage to the capacitor 112.
In the control apparatus-integrated dynamoelectric machine 1 of this embodiment, a seal member 118 is disposed between the inner peripheral surface of the housing recess 110 d and the surface of the capacitor 112.

  When the gas blows out from the explosion-proof valve 112b, the seal member 118 regulates the gas flow even if the blown-out gas tries to flow toward the terminal of the capacitor 112 or the wiring board 111. As a result, it is possible to more reliably suppress electric leakage and short circuit due to gas adhesion. Further, even if a foreign substance enters the case 110 from the opening 110e, the seal member 118 restricts the foreign substance from entering the inside.

Furthermore, the seal member 118 is interposed between the capacitor 112 and the inner surface of the case 110, thereby preventing the case from colliding with the case 110 when the capacitor 112 vibrates. As a result, the capacitor 112 can be prevented from colliding and being damaged.
In the controller-integrated rotating electrical machine 1 of this embodiment, the seal member 118 seals between the capacitor 112 and the housing recess 110d at the peripheral edge of the opening 110e.

  Since the seal member 118 is disposed at the peripheral edge of the opening 110e, the gas blown out from the explosion-proof valve 112b does not flow to the terminal of the capacitor 112 or the wiring board 111 side. As a result, it is possible to more reliably suppress electric leakage and short circuit due to gas adhesion.

In the controller-integrated rotating electrical machine 1 of this embodiment, the capacitor 112 has an explosion-proof valve 112b on one end surface in the substantially cylindrical axial direction. The explosion-proof valve 112b is provided on the axial center side from the peripheral edge (or outer edge) of the end face.
According to this configuration, the peripheral portion of one end face of the capacitor 112 can be sealed with the seal member 118. Moreover, the conventional commercially available electrolytic capacitor can be utilized.

  In the controller-integrated dynamoelectric machine 1 of this embodiment, the capacitor 112 has an axial direction parallel to the axial direction of the dynamoelectric machine 10, and one end face faces away from the dynamoelectric machine 10.

  According to this structure, the capacitor | condenser 112 can be arrange | positioned along the axial direction of the rotary electric machine 10, and an assembly | attachment can be performed easily. Further, the explosion-proof valve 112 b does not face the rotating electrical machine 10. Then, the gas blown out from the explosion-proof valve 112b blows away in the direction away from the rotating electrical machine 10 and is prevented from adhering to the rotating electrical machine 10. Even when the housing 104 of the rotating electrical machine 10 has a potential, it is possible to suppress the occurrence of leakage or short circuit.

[Second Embodiment]
The present embodiment is a controller-integrated dynamoelectric machine 1 having a configuration similar to that of the first embodiment except that a seal member 118 is disposed on a side surface of a substantially cylindrical capacitor 112. Configurations not particularly mentioned in the present embodiment are the same as those in the first embodiment.

In this embodiment, as shown in FIG. 4, a seal member 118 is disposed between the side surface of the substantially cylindrical capacitor 112 and the inner peripheral surface of the case 110. In this embodiment, the seal member 118 is disposed in the vicinity of the upper end portion in the axial direction. However, the seal member 118 may be provided in the vicinity of the central portion or the lower end portion in the axial direction. A plurality of configurations may be provided.
According to the control apparatus-integrated dynamoelectric machine 1 of the present embodiment, it has the same configuration as that of the first embodiment and can exhibit the same effects.

  Furthermore, in the controller-integrated rotating electrical machine 1 of this embodiment, the seal member 118 is disposed so as to seal the side surface of the substantially cylindrical capacitor 112, and when the capacitor 112 swings, the inner periphery of the case 110 is arranged. Prevent collision with the surface.

[Third Embodiment]
The present embodiment is the controller-integrated dynamoelectric machine 1 having the same configuration as that of the first embodiment except that the closing member 120 is disposed in the opening 110e of the case 110. Configurations not particularly mentioned in the present embodiment are the same as those in the first embodiment.

In this embodiment, as shown in FIG. 5, the closing member 120 is made of an elastic resin fitted into the opening 110e. When the explosion-proof valve 112b is opened, the closing member 120 is discharged to the outside together with the gas from the opening 110e, and the opening 110e is opened.
According to the control apparatus-integrated dynamoelectric machine 1 of the present embodiment, it has the same configuration as that of the first embodiment and can exhibit the same effects.

Then, the closing member 120 fitted into the opening 110e closes the opening 110e. The closing member 120 is discharged to the outside from the opening 110e when the explosion-proof valve 112b is opened. Thus, the closing member 120 does not hinder the opening of the explosion-proof valve 112b. And in the state which the explosion-proof valve 112b does not open, the opening part 110e is obstruct | occluded. The blocking member 120 in this state suppresses the passage of foreign matter through the opening 110e. In particular, the foreign matter is prevented from passing through the opening 110e and colliding with the explosion-proof valve 112b.
In this way, the entry of foreign matter can be further suppressed.

[Fourth Embodiment]
The present embodiment is a controller-integrated dynamoelectric machine 1 having the same configuration as that of the first embodiment except that a cover 121 is provided outside the opening 110e of the case 110. Configurations not particularly mentioned in the present embodiment are the same as those in the first embodiment.

In this embodiment, as shown in FIG. 6, the cover 121 is formed on the outer surface of the case 110 so as to cover the opening outside the opening 110 e with a space therebetween. The cover 121 is fixed to the case 110. A space defined between the cover 121 and the case 110 is larger than the amount of gas blown from the capacitor 112. The space defined between the cover 121 and the case 110 is a sealed space, but may be an open space partially opened.
According to the control apparatus-integrated dynamoelectric machine 1 of the present embodiment, it has the same configuration as that of the first embodiment and can exhibit the same effects.

  In this embodiment, the gas blown out after the explosion-proof valve 112b is opened is blown out of the case 110 through the opening 110e. And it blows off to the space between the covers 121. The gas blown out of the case 110 stays in a closed space between the cover 121 and the case 110. As a result, it is possible to suppress electric leakage and short circuit due to gas adhering to the external surface of the controller-integrated rotating electrical machine 1.

  Furthermore, the cover 121 is exposed to the outside of the case 110, and the internal space is not overheated by radiating heat. As a result, the gas blown out from the capacitor 112 is not exposed to high heat and does not explode.

[Fifth Embodiment]
This embodiment has the same configuration as that of the first embodiment, except that an explosion-proof valve 112b is provided on the side surface of the main body 112a of the substantially cylindrical capacitor 112, and the opening 110e of the housing recess 110d is different. This is a controller-integrated rotating electrical machine 1. Configurations not particularly mentioned in the present embodiment are the same as those in the first embodiment.

  In this embodiment, as shown in FIG. 7, the explosion-proof valve 112b is formed on the outer peripheral surface (or side surface) of the central portion in the axial direction (length direction) of the main body 112a of the substantially cylindrical capacitor 112. .

The housing recess 110d has an opening 110e formed in a portion of the capacitor 112 facing the explosion-proof valve 112b. That is, the opening 110e is formed at a position corresponding to the side surface (outer peripheral surface) of the capacitor 112.
According to the control apparatus-integrated dynamoelectric machine 1 of the present embodiment, it has the same configuration as that of the first embodiment and can exhibit the same effects.
Further, a conventional electrolytic capacitor having an explosion-proof valve 112b on the side surface can be used.
Furthermore, the controller-integrated rotating electrical machine 1 of the present embodiment may apply the same configuration as in the second to fourth embodiments.

1: Controller-integrated rotating electrical machine 10: Rotating electrical machine 11: Controller 100: Stator 100a: Stator core 100b: Armature winding 101: Rotor 101b: Field winding 102: Rotating shaft 104: Housing 110: Case 111: Wiring board 112: Capacitor 113: Inverter circuit 114: Field circuit 115: Brush 116: Control circuit 117: Heat sink 118: Seal member 120: Closure member 121: Cover

Claims (8)

A rotating electrical machine (10) including a stator (100) and a rotor (101);
A control device (11) comprising a control circuit for controlling the rotating electrical machine;
A controller-integrated dynamoelectric machine (1) having:
The control device (11)
A capacitor element (112) having an explosion-proof valve portion (112b);
A case (110) for accommodating a circuit member (111) having the capacitor element;
With
The control device-integrated dynamoelectric machine (1), wherein the case is provided with an accommodation recess (110d) having an opening (110e) communicating with the outside at a position facing the explosion-proof valve portion in which the capacitor element is accommodated.   The controller-integrated dynamoelectric machine according to claim 1, wherein a seal member (118) is disposed between an inner peripheral surface of the housing recess and a surface of the capacitor element.   The control device-integrated dynamoelectric machine according to claim 2, wherein the seal member seals between the capacitor element and the receiving recess at a peripheral edge of the opening.   The said capacitor | condenser element has a column-shaped main-body part (112a), and is equipped with the said explosion-proof valve part in the axial center side from the outer edge part of the one end surface in the axial direction of this main-body part. The controller-integrated dynamoelectric machine described in 1. The capacitor element is provided such that the axial direction of the main body is parallel to the axial direction of the rotating electrical machine,
The controller-integrated rotating electrical machine according to claim 4, wherein the explosion-proof valve portion is provided on an end surface of the main body portion separated from the rotating electrical machine.   The said capacitor | condenser element has a column-shaped main-body part (112a), The control apparatus of any one of Claims 1-3 with which the said explosion-proof valve part is provided in the outer peripheral surface of the circumferential direction of this main-body part. Integrated rotating electric machine. The opening has a closing member (120) for closing the opening,
The control device-integrated dynamoelectric machine according to any one of claims 1 to 6, wherein the closing member opens the opening when the explosion-proof valve portion is opened.   The control device-integrated dynamoelectric machine according to any one of claims 1 to 7, wherein a cover (121) that covers the opening in a state having a gap is provided on an outer surface of the housing recess.

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