JP2005102465A - Generator motor coupled integrally with control unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generator motor coupled integrally with a control unit capable of exchanging heat sufficiently between a radiating member and air, and cooling control elements effectively without increasing air flow rate. <P>SOLUTION: This generator motor is coupled integrally with the control unit, and comprises a stator 30 and a rotor 25 contained in a housing 16 in which an exhaust outlet 18a is formed; the control unit 65 that, mounted in a donut-shaped casing 50 fixed to the housing, includes control elements 53 and the like that convert AC to DC; a hollow disk-shaped radiating member 70 on one side surface of which a plurality of radiating fins 73 are formed, and on the other side of which the control elements are mounted; and a cover 80 that covers the radiating fins and on the outside circumferential portion of which a plurality of inlets 85 are formed. The control element 53 and the like are cooled by making air sucked from the inlets 85 flow in the centripetal direction of the radiating member 70, pass through hollow holes 72, and discharged form an outlet 18a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a controller-integrated generator motor in which a controller motor is integrated with a generator motor.

  The alternator of the vehicle uses the driving force of the engine to rotate the rotor and generates an alternating current in the stator coil. The alternating current is full-wave rectified by a control device (rectifier) and taken out from the output terminal as a direct current. In order to suppress a temperature rise due to heat generation during operation of the control device, a heat radiating member is often attached near the control device. Air is circulated along the fins of the heat radiating member to cool (heat radiate) the control device.

  A conventional vehicular AC generator (see Patent Document 1) adjusts an output voltage, a cooling fin that holds and fixes a rectifying element that rectifies generated power, a brush holder that holds a brush that supplies excitation current, and the like. And an IC regulator for holding these and a rear cover for holding them.

The IC regulator is disposed between the brush holder and the rear cover, and the heat radiating plate is opposed to the vent hole provided in the rear cover. External air is absorbed into the interior by the fins of the rotor and then flows along the fins.
JP 2001-298907 A

  In the conventional example described above, air flows through the vent formed in the center of the rear cover in the thickness direction of the rear cover, that is, in the axial direction of the AC generator, and collides with the metal heat sink of the IC regulator. However, this does not necessarily mean that the heat dissipation effect is high.

  The temperature of the heat dissipating member rises due to the heat generated by the control element, and the heat is exchanged with the air flowing along the surface. Therefore, in order to obtain a high heat dissipation effect, it is preferable that the contact area between the heat dissipation member and air is wide and the air flow is active. In this respect, the conventional example with a small contact area cannot be said to be sufficiently cooled, and it is necessary to increase the amount of air flow (suction amount) in order to achieve sufficient cooling.

  The present invention has been made in view of the above circumstances, and is capable of effectively cooling the control element by sufficiently exchanging heat between the heat dissipating member and the air without increasing the air flow rate. An object is to provide an electric motor.

According to the present invention, when air flows through the side surface of the heat radiating member in the center direction and is sucked from the hollow hole toward the stator and the rotor, the heat of the control element is effectively exchanged with the air. The basic technical idea is to form an air inlet at a proper position and range.
(1) A controller-integrated generator motor according to a first aspect of the present invention includes a housing in which an exhaust port is formed, a stator fixed to the housing, and a rotor rotatably supported by the housing. And a donut-shaped casing fixed to the housing, and the alternating current generated in the stator coil during rotation of the rotor contained in the casing is converted into direct current, and the direct current is converted into alternating current to rotate the rotor and supplied to the stator. A control device including a control element that is fixed to the casing; a hollow heat radiating member in which a plurality of heat radiating fins are radially formed on one side surface and the control element is mounted on the other side surface; And a cover having a plurality of air inlets formed in the part.

  In this generator motor, the air sucked from the intake port by the negative pressure generated by the fan of the rotor is circulated in the centripetal direction of the heat radiating member on which the heat radiating fins are formed, the hollow hole is passed through in the axial direction, and then the exhaust of the housing Drain from mouth. The temperature of the heat radiating member is suppressed by air, and the control element is cooled.

  According to a second aspect of the present invention, there is provided a generator motor according to the first aspect, wherein the cover includes a bottom wall portion and a peripheral wall portion, the intake port is located near the outer periphery of the bottom wall portion, a corner portion at the boundary between the bottom wall portion and the peripheral wall portion, and the peripheral wall It is formed in at least one of the parts. According to a third aspect of the present invention, there is provided the generator motor according to the second aspect, wherein the air inlet is formed to face the space between the heat radiating fins in the circumferential direction of the cover. According to a fourth aspect of the present invention, in the generator motor according to the second aspect, the cover has a small opening ratio in the central portion and a large opening ratio in the peripheral portion. The generator motor according to claim 5 is the generator motor according to claim 4, wherein the intake port is not formed in the axial projection region of the hollow hole on the bottom wall portion.

  According to a sixth aspect of the present invention, the generator motor according to the fourth aspect is configured such that the intake port has a larger opening ratio in a circumferential direction of the cover than a portion facing the engine. According to a seventh aspect of the present invention, there is provided the generator motor according to the fourth aspect, wherein the intake port is not formed at a portion where the generator motor faces the engine in the circumferential direction of the cover. The generator motor according to claim 8 is the generator motor according to claim 2, wherein the heat dissipating member includes a bottom wall portion and a peripheral wall portion, and a plurality of fins are radially formed on at least the bottom wall portion.

According to a ninth aspect of the present invention, the generator motor according to the second aspect is further provided with a flow preventing portion for preventing the exhaust from the exhaust port from flowing toward the cover in the axial direction. According to a tenth aspect of the present invention, in the ninth aspect, the flow preventing portion is formed in the casing. The generator motor according to an eleventh aspect is the ninth aspect, wherein the flow preventing portion is formed in the housing. According to a twelfth aspect of the present invention, in the ninth aspect, the flow preventing portion is formed in the cover.
(2) The controller-integrated generator motor according to the second aspect of the present invention is, as described in claim 13, a housing in which an exhaust port is formed, a stator and a rotor accommodated in the housing, and a current generated in the stator. A control device that converts and supplies current to the stator to convert and rotate the rotor, a heat radiating member adjacent to the control device and having a hollow hole in the center, and a cover that covers the heat radiating member,
The air sucked from the air inlet is circulated along the heat radiating member in the centripetal direction and then the hollow hole in the axial direction, and then discharged from the air outlet of the housing to cool the control device.

  In this generator motor, air sucked from the intake port by the negative pressure generated by the rotor is circulated in the centripetal direction of the heat radiating member, passes through the hollow hole in the axial direction, and is then discharged from the exhaust port of the housing. The air flowing over the surface suppresses the temperature rise of the heat radiating member, thereby cooling the control device adjacent to the heat radiating member.

  According to a fourteenth aspect of the present invention, in the generator motor according to the thirteenth aspect, the cover is formed of a separate member from the housing. According to a fifteenth aspect of the present invention, in the fourteenth aspect, the cover has a disk shape, and a space between the cover and the radiating member serves as an intake port. According to a sixteenth aspect of the present invention, in the fourteenth aspect, the cover includes a bottom wall portion and a peripheral wall portion. According to a seventeenth aspect of the present invention, in the generator motor according to the sixteenth aspect, the cover has a small opening ratio at the center and a large opening ratio at the outer peripheral portion. A generator motor according to an eighteenth aspect is the generator motor according to the seventeenth aspect, wherein at least one of the bottom wall portion of the cover, the peripheral wall portion, and the corner portion where the bottom wall portion and the peripheral wall portion intersect with each other is separated in the circumferential direction. It is installed. According to a nineteenth aspect of the present invention, in the eighteenth aspect of the present invention, in the eighteenth aspect, in the circumferential direction of the cover, the air inlet is opposed to the concave portion between the radiating fins adjacent to the radiation member.

  A generator motor according to a twentieth aspect of the present invention is the generator motor according to the thirteenth aspect, wherein the cover includes an extension portion extending from the housing and including a cylindrical portion and a lid portion covering the opening. The generator motor according to claim 21 is the generator motor according to claim 20, wherein the cover has a small opening ratio in the central portion and a large opening ratio in the peripheral portion. According to a twenty-second aspect of the present invention, the generator motor according to the twenty-first aspect is provided with a plurality of air inlets spaced circumferentially in at least one of a cylindrical portion of the cover, a lid portion, and a corner portion where the bottom wall portion and the peripheral wall portion intersect. ing.

  According to a twenty-third aspect of the present invention, in the thirteenth aspect, the heat dissipation member has a disk shape. A generator motor according to a twenty-fourth aspect is the one according to the twenty-third aspect, wherein a plurality of fins are radially formed on the heat dissipation member.

According to a twenty-fifth aspect of the present invention, in the thirteenth aspect, the heat dissipating member includes a bottom wall portion and a peripheral wall portion.
A generator motor according to a twenty-sixth aspect is the one according to the twenty-fifth aspect, wherein a plurality of heat radiation fins are formed radially on at least the bottom wall portion. According to a twenty-seventh aspect of the present invention, in the thirteenth aspect, the control device is housed in any one of the housing, the cover, and the casing between the housing and the cover.

  According to a twenty-eighth aspect of the present invention, the generator motor according to the thirteenth aspect further includes an exhaust flow preventing portion that prevents exhaust from the exhaust port of the housing from flowing to the cover side. According to a twenty-ninth aspect of the present invention, in the twenty-eighth aspect, the exhaust flow preventing portion is formed in the housing. According to a thirty-fifth aspect of the present invention, in the twenty-eighth aspect, the exhaust flow preventing portion is formed in the cover. A generator motor according to a thirty-first aspect is the one according to the twenty-eighth aspect, wherein the exhaust flow preventing portion is formed in a casing between the housing and the cover.

(1) According to the control device-integrated generator-motor of the first invention, since the air inlet is formed in the outer peripheral portion of the cover, the sucked air has an outer periphery between the adjacent fins on the side surface of the heat radiating member. Flows in the centripetal direction from the center to the center and contacts the heat radiating member over a wide area. As a result, heat of the heat radiating member is exchanged with air through the heat radiating fins, and the control element is effectively cooled.

  According to the generator motor of the second aspect, even when the intake port is formed in any part of the outer peripheral portion of the cover, an air flow flowing in the centripetal direction on the side surface of the heat radiating member is obtained, and the control element is cooled. According to the generator motor of the third aspect, the air sucked from the air intake port of the cover hardly collides with the heat radiating fins of the heat radiating member and easily flows through the space between the heat radiating fins.

  According to the generator motor of the fourth aspect, since the opening ratio of the peripheral portion is larger than that of the central portion, air is easily sucked in the peripheral portion and air easily flows toward the central portion. According to the generator motor of claim 5, since the air inlet is not formed in the center portion of the cover corresponding to the center portion of the heat radiating member in which air hardly flows, it is possible to prevent a decrease in the air flow speed and a decrease in the circulation amount. it can.

  According to the generator motor of claim 6, since the opening ratio of the outer peripheral portion of the cover other than the portion facing the engine (the portion not facing) is larger than that of the facing portion. The hot air of the engine is hardly sucked and the cooling effect can be prevented from being reduced.

According to the generator motor of the seventh aspect, since the intake port is not formed in the outer peripheral portion of the cover that is easily exposed to the hot air of the engine, it is difficult for the hot air of the engine to be sucked and the reduction of the cooling effect can be prevented. . According to the generator motor of the eighth aspect, since the heat radiating fins are formed on the heat radiating member, air easily flows in the centripetal direction. According to the generator motor of claims 9 to 12, the flow of exhaust (warm air) discharged from the housing toward the cover is prevented by the flow preventing portion, and the cooling effect can be prevented from being reduced.
(2) According to the controller-integrated generator / motor of the second invention, since the air inlet is formed in the outer peripheral portion of the cover, the sucked air is centripetal along the heat dissipating member from the outer peripheral portion toward the central portion. Flows in the direction and contacts the heat dissipation member. As a result, heat of the heat radiating member is exchanged with air, and the control device is effectively cooled.

  According to the generator motor of the fourteenth aspect, flexibility occurs in selecting the shape of the cover for covering the heat radiating member. According to the generator motor of the fifteenth aspect, the structure of the cover is simple, and the formation of the intake port is facilitated. According to the generator motor of the sixteenth aspect, the cover can reliably cover the entire heat radiating member. According to the seventeenth and twenty-first aspect of the present invention, since the opening ratio of the peripheral portion is larger than that of the central portion, air is sucked in the peripheral portion and easily flows toward the central portion.

  According to the generator motor of claims 18 and 22, the position and the number of the intake ports can be arbitrarily selected. According to the generator motor of the nineteenth aspect, the air sucked from the air intake port of the cover hardly collides with the heat radiating fins of the heat radiating member and easily flows through the space between the heat radiating fins. According to the generator motor of the twentieth aspect, since the extension portion of the housing functions as a cover, a dedicated cover is unnecessary, the number of parts is reduced, and the cover is not required to be attached to the housing.

  According to the generator motor of claim 23, the configuration is simple because the heat dissipating member is in the shape of a disk. According to the generator motor of claims 24 and 26, since the heat radiating fins are formed on the heat radiating member, air easily flows in the centripetal direction. According to the generator motor of the twenty-seventh aspect, the control device can be accommodated in the housing, the cover, or the casing, and the accommodation method is flexible.

  According to the generator motor of the twenty-eighth aspect, the flow of exhaust (warm air) discharged from the housing toward the cover is prevented by the air flow prevention unit, and the reduction of the cooling effect can be prevented. According to the generator-motors of claims 29, 30 and 31, flexibility arises in the way of forming the air flow preventing portion.

<Generator motor>
The generator motor is obtained by adding a function of the motor to the generator, and includes a housing, a stator and a rotor, a control device, a heat radiating member, and a cover. These are arranged in the order of the stator, the rotor, the control device, and the heat dissipating member from one axial end to the other end.

  When used as a generator, the rotor is rotated using the driving force of the engine to generate an alternating current in the stator coil. The alternating current is full-wave rectified by the rectifying element of the control device, and is taken out as a direct current from the output terminal. On the other hand, when used as an electric motor, the direct current of the direct current power source is converted into alternating current by a switch element and supplied to the stator coil to rotate the rotor.

Thus, the principle of power generation of the generator motor of the present invention is the same as that of the AC generator, and thus the generator motor is a broad concept including the AC generator.
<Housing>
The housing accommodates at least the stator and the rotor, has an exhaust port for discharging warm air heated inside the generator motor (particularly the control device) to the outside, and the plurality of exhaust ports are spaced apart in the circumferential direction. The housing can also accommodate the control device.

  Furthermore, the extension part (the cylindrical part and the cover part covering the opening) of the housing extending in the axial direction can cover the heat dissipation member. In this case, since the extension part of the housing functions as a cover, it is not necessary to provide a cover separate from the housing. An intake port may be formed in the extension (described later in the “intake port” column).

Specifically, the housing may consist of a single member, but it can also consist of two housing pieces. For example, in the latter case, the stator and the rotor are accommodated in one housing piece, and the other housing piece located on the control device side and covering the one housing piece is provided with an air exhaust port. The exhaust port may be formed over the entire circumference of the peripheral wall portion of the other housing, or may be formed only in a part of the circumferential direction.
<Control device>
The control device converts a current generated in the stator and converts and supplies the current to the stator in order to rotate the rotor, and includes a casing and a control element. A casing disposed between the housing and the cover is fixed to the housing and can have a donut shape. A rotating shaft to which the rotor is attached passes through the hollow portion. The control element is mounted on a heat radiating member described below and is accommodated in the casing.

In addition, the extension part which extended the housing or the cover to the axial direction can be functioned as a casing, and a control apparatus can also be accommodated in the inside. That is, the casing can be formed integrally with the housing or the cover.
<Heat dissipation member>
The heat dissipating member is arranged adjacent to the control device and dissipates the heat to cool the control device. It is made of a material with excellent thermal conductivity and has a disk shape or a dish shape. The part has a hollow hole penetrating in the axial direction. The dish-shaped heat radiating member has a disk part and a peripheral wall part (an inner peripheral wall part and / or an outer peripheral wall part).

  The bottom wall of the disc-shaped heat radiating member and the dish-shaped heat radiating member can include a plurality of radial heat radiating fins on one side surface, but it is not essential to have the heat radiating fins. The “radial” includes not only the case of extending linearly in the radial direction but also the case of extending spirally as shown in FIG. The peripheral wall portion of the dish-shaped heat radiating member can also be provided with heat radiating fins as necessary.

Specifically, for example, a plurality of radiating fins are formed radially on one side surface of a hollow disk-shaped bottom wall (main body), and the control element is mounted on the other side surface and attached to the casing. The radial length of the radiating fin and the pitch in the circumferential direction can be selected as appropriate. Air flows in the centripetal direction through the space between the radiating fins, and its starting point is determined by the position of the intake port such as the cover.
<Cover>
The cover covers the heat radiating member, and is composed of a member different from the housing or an extension of the housing, and can have a disk shape or a dish shape. The dish-shaped cover includes a bottom wall portion and a peripheral wall portion (an inner peripheral wall portion and / or an outer peripheral wall portion), and it is preferable that an air inlet is formed at least in part, but this is not essential (" (It will be described later in the “intake port” column).

When the cover has an air inlet, the aperture ratio at the center can be reduced and the aperture ratio at the periphery can be increased.
Although depending on various conditions, when the radius of the cover is r, for example, “center” means a region from r / 3 to the center side of r / 2, and “peripheral” means the other region. say. Specifically, the intake ports may be formed only in the peripheral portion and not in the central portion, or the large or many intake ports may be formed in the peripheral portion and the small or few intake ports may be formed in the central portion.

In the circumferential direction of the cover, it is desirable not to form an intake port in a portion facing the engine. This is because the engine is in a high-temperature environment, and if an intake port is formed on the side opposite to the engine, hot air is sucked and hardly serves to cool the control element. The shape and density of the air inlets in the bottom wall portion and / or the peripheral wall portion may be the same in the entire circumference, but the size of a portion in the circumferential direction can be made larger or smaller than the size of other portions. Further, the formation density of a certain portion in the circumferential direction can be made denser or coarser than the formation density of other portions.
<Inlet>
The intake port is an inlet for sucking outside air into the generator motor, particularly around the control device. The cooling air is disposed at a position suitable for circulating the cooling air in the direction of the center of the heat radiating member, and has a suitable shape and number. For example, it is formed in a dish-shaped cover that is separate from the housing, the space between the housing and a flat plate-like cover that is separate from this is used as an air intake, or an extension of the housing that functions as a cover (cylindrical) And the lid part).

  Specifically, the air inlet is at least one of the bottom wall portion of the dish-shaped cover, the peripheral wall portion, and the corner portion where the bottom wall portion and the peripheral wall portion intersect (only one, two or three). It is formed. Moreover, it forms in at least one of the corner | angular part where the cylindrical part which comprises a cover, a cover part, and a cylindrical part and a cover part cross | intersect a housing. In any case, a plurality of air inlets can be provided circumferentially, that is, annularly spaced, and the annular air inlet group can be formed in a single or double or more manner.

Moreover, when a heat radiating member has a heat radiating fin, an air inlet can be made to respond | correspond to the space (concave part) between the heat radiating fins adjacent in the circumferential direction.
<Exhaust flow prevention part>
The exhaust flow prevention unit prevents exhaust (warm air) having a temperature higher than that of air passing through the generator motor and exhausted from the exhaust port from flowing to the cover side. Even if this warm air is sucked from the cover again, the cooling effect cannot be expected so much. Therefore, the exhaust flow prevention unit prevents the exhaust from the housing from flowing toward the cover, that is, the exhaust warm air from being sucked into the suction air.

  The exhaust flow prevention part can be formed in a cylindrical part of the extension part of the housing, a part of the cover, or a casing between the housing and the cover. Specifically, an arc-shaped protrusion having a predetermined width and a predetermined height in the radial direction may be formed in a specific region of the outer peripheral surface of the casing.

Hereinafter, a generator motor according to an embodiment of the present invention will be described with reference to the accompanying drawings.
<Example>
(Constitution)
FIG. 1 shows a control system for the entire hybrid vehicle. This control system includes a battery 102, a load 104 and an MG 100. As shown in FIGS. 2 and 3, the MG 100 includes a housing 10, a stator 30 and a rotor 25, a control device 65, a heat radiating member 70, and a rear cover 80.

  A stator 30 and a rotor 25 are disposed in the left housing 11 and the right housing 16 that are open at one end. That is, the rotary shaft 20 is rotatably supported by the end wall 12 of the left housing and the end wall 17 of the right housing 16 via the bearings 14a and 14b. A pulley 22 is fixed to a shaft portion protruding from the end wall 12, and a rotor 25 is attached to an intermediate portion accommodated in the peripheral wall 13.

  Rotor 25 includes a pair of rotor cores 26a and 26b and a field coil 27 wound between the rotor cores. The stator 30 attached to the peripheral wall portion of the left housing 11 includes a stator core 31 and a stator coil 32 inserted into the slot thereof, and faces the rotor 25. A fan 28 a is formed near the outer periphery of the left side surface of the rotor 25, and exhaust ports 12 a and 13 a are formed in the end wall 12 and the peripheral wall 13 of the left housing 11 so as to face this. A fan 28 b is formed on the right side surface of the rotor 25, and exhaust ports 18 a and 17 a are formed in the peripheral wall 18 and the end wall 17 of the right housing 16 so as to face the fan 28 b.

  As can be seen from FIG. 1, the control device 65 includes an inverter case 50, an inverter circuit 52, a control circuit 59, and the like. The inverter case 50 is made of a resin material, has a donut shape as a whole, and the brush holder 42 is disposed in the hollow portion thereof. The brush 40 held by the brush holder 40 is in contact with the slip ring 19 attached to the right end of the rotating shaft 20.

  In a space defined by the inner peripheral wall 51a and the outer peripheral wall 51b of the inverter case 50, three sets of transistors (switch elements) 53, 54 and 55 constituting the inverter circuit 52 are arranged. A U-phase transistor 53, a V-phase transistor 54, and a W-phase transistor 55 are connected to the U-phase, V-phase, and W-phase stator coils 32, respectively. A field transistor 57 is connected to the field coil 27 of the rotor 25.

  The heat radiating member 70 is made of a conductive material, and includes a bottom wall portion 71 and a peripheral wall portion 75 each having a generally hollow disk shape, as can be seen from FIGS. The bottom wall portion 71 is formed with a hollow hole 72 in the center and a plurality of radiating fins 73 radially formed on the outer surface. An output terminal 76 is erected on the peripheral wall 75. The inverter case 50 and the heat radiating member 70 are coupled together by bolts or adhesion.

  As shown in FIGS. 4 and 5, the rear cover 80 made of a thin plate and covering the heat radiating member 70 includes a bottom wall portion 81 and a peripheral wall portion 83, and has a circular dish shape as a whole. A large number of air inlets 85 are provided in a circumferential direction in a portion extending from the outer peripheral portion excluding the central portion of the bottom wall portion 81 to the peripheral wall portion 83 (only the outer peripheral portion at the upper end of the bottom wall portion 81). They are located on the outer peripheral side of the axial projection region 81 a of the hollow hole 72 of the heat radiating member 70 on the bottom wall portion 81 and correspond to the space between the adjacent fins 73 of the heat radiating member 70. Each intake port 85 has an elongated rectangular shape with a radial dimension longer than a circumferential dimension.

Returning to FIG. 1, an external signal is input from the external terminal 58 to the control circuit 59, and is input from the control circuit 59 to each of the transistors 53 to 54 and the field transistor 57.
(Operation)
(1) When the MG 100 functions as a generator When the vehicle is running with the driving force of an engine (not shown), the rotation of the engine is input to the pulley 22 via the belt. A field current is supplied from the battery 102 to the field coil 27 of the rotor 25 through the field transistor 57, the brush 40, the slip ring 19, and the like. As a result, the rotor 25 rotates with respect to the stator 30, and a three-phase alternating current is generated in the stator coil 32. This three-phase alternating current is rectified to direct current by a diode connected to the transistors 53 to 55 and taken out via the output terminal 76.
(2) When MG 100 functions as an electric motor When starting after an idle top, the direct current of battery 102 is converted into an alternating current by a switching action of transistor 53 and the like and supplied to stator coil 32. At that time, the phase in the rotation direction of the rotor 25 is detected by a magnetic pole position sensor (not shown) or the like. As a result, the rotor 25, that is, the rotating shaft 20 rotates with respect to the stator 30, and the driving force is transmitted to the engine via the pulley 22 and the belt.
(3) Heat dissipation Heat generated in the transistor 53 or the like during conversion from direct current to alternating current is transmitted to the bottom wall 71 of the heat dissipation member 70. The fan 28b of the rotating rotor 25 generates a negative pressure in the air flow path between the brush holder 42 and the inverter case 52, that is, the hollow hole 72 of the heat radiating member 70, and the air is sent from the air inlet 85 of the rear cover 80 in the centripetal direction (x In the direction).

Heat is exchanged between the heat of the radiating fins 73 and the air flowing between the adjacent radiating fins 73 in the centripetal direction, and the bottom wall 71, that is, the transistor 53 and the like are cooled (air cooled). After that, the air flows in the axial direction through the hollow hole 72 of the heat radiating member 70 and the hollow hole of the inverter case 50, and is discharged radially outward (y direction) from the exhaust port 18 a of the right housing 16.
(effect)
According to this embodiment, the transistor 53 and the like are effectively cooled by the airflow flowing along the heat radiation fins 73 of the heat radiation member 70. The first reason is that the air inlet 85 of the rear cover 80 is formed from the vicinity of the outer periphery of the bottom wall portion 81 to the peripheral wall portion 83 and opposed to the space between the radiating fins 73. The sucked air flows in the centripetal direction between the radiating fins 73, and at that time, contacts the bottom wall portion 71 of the radiating member 70 and the radiating fins 73 in a wide area.

Second, the air inlet 85 is not formed in the circular projection area 81a at the center of the bottom wall 81 of the rear cover 80. As can be seen from FIG. 2, the rotating shaft 20, the brush holder 42, and the like are disposed in the center portion of the inverter case 50 corresponding to the projection region 81 a of the bottom wall portion 81, and air hardly flows.
<Modification>
Hereinafter, modifications of the above embodiment will be described.
(1) Cover shape, inlet position a. Dish-shaped cover The dish-shaped cover separate from the housing includes a disk-shaped bottom wall portion and a peripheral wall portion, and covers the heat radiation fins of the heat radiation member. More specifically, when the intake port 105 of the cover 100A is formed near the outer periphery of the bottom wall 101 as shown in FIG. 6A (first type), the intake of the cover 100B as shown in FIG. 6B. When the mouth 106 is formed at the corner 103 between the bottom wall 101 and the peripheral wall 102 (second type), or when the inlet 107 of the cover 100C is formed at the peripheral wall 102 as shown in FIG. (Third type).

  In the first type cover 100A, outside air enters from the air inlet 105 and flows radially inwardly between the radiating fins at a relatively small angle with respect to the axis of the cover 100A, that is, the radiating member 110. In the third type cover 100 </ b> C, air flows at an angle close to a right angle with respect to the axis of the cover 100 </ b> C, that is, the heat radiating member 110. In the second type cover 100 </ b> B, the air flows at an intermediate angle between the two.

  In the cover 100 </ b> A of FIG. 6A, it is desirable that the air inlet 105 of the bottom wall portion 101 is not formed in the axial projection region (circular portion) of the hollow hole 111 of the heat radiating member 110. If the air inlet 105 is formed in this portion, there is a possibility that the same problem as in the conventional case occurs. Further, in the cover 100C of FIG. 6C, it is desirable not to form the air inlet 107 on the peripheral wall portion 102 closer to the tip (lower end in FIG. 6C) than the peripheral wall portion 112 of the heat radiating member 110. .

As shown in FIG. 6D, a cover 100D having a dish shape including the bottom wall portion 101 and the peripheral wall portion 102 but not having an intake port can also be employed (the dish-shaped cover 100D has an intake port). It is not essential to prepare). In this case, for example, a clearance or a space between the cover 100D and the control device may be used as an intake port.
b. Flat Cover As shown in FIG. 7A, a flat cover 120 that does not have an intake port can also be employed. In this case, a space 128 between the cover 120 and the heat radiating member 125 serves as an air inlet, and air flows from the air inlet 128 along the heat radiating fin 126 in the centripetal direction. According to this modification, the shape of the cover 120 becomes simple. In addition, when the space 128 between the cover 120 and the heat radiating member is small, an air inlet (not shown) can be provided in the cover 120.
c. Cover consisting of an extension of the housing In the modification shown in FIG. 7B, the extension 135 at the other end of the housing 130 extends beyond the control device 65 and the heat dissipating member 125 in the axial direction (rightward in FIG. 7B). ) And functions as a cover. That is, the extension part 135 includes a cylindrical part 131 and a circular lid part 133 that covers the opening thereof, and a base part (a part closer to the housing) 132 a of the cylindrical part 131 accommodates the control device 65. And the front-end | tip part 132b and the cover part 133 of the cylindrical part 131 cover the heat radiating member 125 which has the heat radiating fin 126, and the some inlet 134 is formed in the circumferential direction near the outer periphery of the cover part 133, and it is separated.

According to this modification, the dish-shaped cover 135 including the tip end portion 132b of the cylindrical portion 131 and the lid portion 133 performs the same function as the rear cover 80 of the above-described embodiment. Therefore, the cover is separate from the housing. It is not necessary to provide Note that the air inlet 134 may be formed in one or a plurality of the root portion 132a and the tip portion 132b of the cylindrical portion 131 and the lid portion 133.
(2) Exhaust Flow Prevention Portion In the modification shown in FIGS. 2 and 4, the exhaust (warm air) from the exhaust port 18 a of the right housing 16 is difficult to flow to the intake port 85 side of the rear cover 80. That is, as shown by a two-dot chain line in FIGS. 2 and 4, an exhaust entrainment prevention protrusion (exhaust flow prevention portion) 90 extending radially outward is provided on the outer peripheral surface of the outer peripheral wall 51 b of the inverter casing 50. Is formed. The protrusion 90 is located between the exhaust port 18 a and the intake port 85 and has a predetermined height, and prevents exhaust from the exhaust port 18 a from flowing toward the rear cover 80.
(3) Relationship Between Cover Inlet and Engine In FIG. 8, in addition to the configuration of the above embodiment, the modified example has a structure in which hot air of engine 150 is not easily sucked from inlet 85 of rear cover 80. That is, as can be seen from FIG. 8 showing the positional relationship between the engine 150 and the generator motor 155, about half of the entire circumference of the generator motor 155 faces the engine 150.

  In view of this, in the bottom wall portion 81 and the peripheral wall portion 83 of the rear cover 80, more intake ports 85 are formed on the non-facing side than the side facing the engine 120 in the circumferential direction. Thus, air that is relatively low in temperature and is effective for cooling the heat radiating member is sucked from the intake port 85 formed only on the side not facing the engine 120.

In the dish-shaped cover shown in FIG. 6D, more intake ports (not shown) can be provided on the non-opposing side than on the side facing the engine. As a result, air that is relatively low in temperature and that is effective in cooling the heat radiating member is sucked from the intake port on the side not facing the engine.

1 is a system diagram of a hybrid vehicle to which the present invention is applied. It is a longitudinal cross-sectional view which shows the Example of this invention. Similarly, it is a perspective view (however, a rear cover is not shown). Similarly, it is a perspective view (however, the rear cover is partially omitted). It is principal part (a heat radiating member and a rear cover) sectional drawing of an Example. (A) (b) (c) And (d) is sectional drawing which shows the modification of the inlet port of a plate-shaped cover. (A) is a flat cover, (b) is a cross-sectional view showing a cover formed of an extension of the housing. It is explanatory drawing which shows the position of the inlet port of a cover in consideration of the relationship with an engine. It is a front view which shows the heat radiating member in which the spiral heat radiating fin was formed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Housing 18a: Exhaust port 25: Rotor 30: Stator 50: Inverter case 65: Control device 70: Radiation member 71: Bottom wall part 73: Radiation fin 80: Rear cover 81: Bottom wall part 83: Peripheral wall part 85: Inlet port

Claims (31)

A housing in which an exhaust port is formed;
A stator fixed to the housing, and a rotor rotatably supported by the housing;
A donut-shaped casing fixed to the housing; and alternating current generated in a stator coil when the rotor is rotated in the casing is converted into direct current, and direct current is converted into alternating current to rotate the rotor, and the stator A control device including a control element to be supplied to,
A hollow heat dissipating member fixed to the casing, a plurality of heat dissipating fins formed radially on one side surface and the control element mounted on the other side surface,
A cover that covers the heat dissipating fins and has a plurality of air inlets formed on the outer periphery thereof;
The control element is cooled by circulating air sucked from the intake port by the fan of the rotor in the centripetal direction of the heat radiating member, passing through a hollow hole in the axial direction, and exhausting the air from the exhaust port. Control device integrated generator motor.   The cover includes a bottom wall portion and a peripheral wall portion, and the intake port is formed near the outer periphery of the bottom wall portion, at a corner portion of the boundary between the bottom wall portion and the peripheral wall portion, and at least one of the peripheral wall portions. The controller-integrated generator motor according to claim 1.   The controller-integrated generator motor according to claim 2, wherein the intake port is formed to face a space between the heat radiating fins in a circumferential direction of the cover.   The controller-integrated generator motor according to claim 2, wherein the cover has a small opening ratio in a central portion and a large opening ratio in a peripheral portion.   5. The controller-integrated generator motor according to claim 4, wherein the intake port is not formed in an axial projection region of the hollow hole on the bottom wall portion.   5. The controller-integrated generator motor according to claim 4, wherein the intake port is formed so that an opening ratio of a portion other than a portion where the generator motor faces the engine is increased in a circumferential direction of the cover.   5. The controller-integrated generator motor according to claim 4, wherein the intake port is not formed in a portion of the cover facing the engine in the circumferential direction of the cover.   The controller-integrated generator motor according to claim 2, wherein the heat dissipating member includes a bottom wall portion and a peripheral wall portion, and at least a plurality of fins are radially formed on the bottom wall portion.   The controller-integrated generator motor according to claim 2, further comprising a flow prevention portion that prevents exhaust from the exhaust port from flowing toward the cover in the axial direction.   The controller-integrated generator motor according to claim 9, wherein the flow prevention unit is formed in the casing.   The control apparatus-integrated generator motor according to claim 9, wherein the flow preventing portion is formed in the housing.   The control apparatus-integrated generator motor according to claim 9, wherein the flow prevention unit is formed on the cover. A housing in which an exhaust port is formed, a stator and a rotor accommodated in the housing, and a control device that converts the current generated in the stator and converts and supplies the current to the stator to rotate the rotor And a heat dissipating member adjacent to the control device and having a hollow hole in the center, and a cover covering the heat dissipating member,
The control device is cooled by circulating air sucked from an air inlet in a centripetal direction along the heat radiating member and then in an axial direction through the hollow hole, and then exhausting the air from an exhaust port of the housing. Controller-integrated generator motor.   The controller-integrated generator motor according to claim 13, wherein the cover is made of a member different from the housing.   The controller-integrated generator motor according to claim 14, wherein the cover has a disk shape, and a space between the cover and the heat radiating member serves as the intake port.   The controller-integrated generator motor according to claim 14, wherein the cover includes a bottom wall portion and a peripheral wall portion.   The controller-integrated generator motor according to claim 16, wherein the cover has a small opening ratio at a central portion and a large opening ratio at an outer peripheral portion.   The plurality of air inlets are circumferentially arranged in at least one of a bottom wall portion of the cover, a peripheral wall portion, and a corner portion where the bottom wall portion and the peripheral wall portion intersect. Control device integrated generator motor.   19. The controller-integrated generator motor according to claim 18, wherein the intake port faces a recess between adjacent radiating fins of the radiating member in a circumferential direction of the cover.   The controller-integrated generator motor according to claim 13, wherein the cover includes an extension portion extending from the housing and including a cylindrical portion and a lid portion covering the opening.   21. The controller-integrated generator motor according to claim 20, wherein the cover has a small opening ratio in a central portion and a large opening ratio in a peripheral portion.   The plurality of air inlets are circumferentially arranged in at least one of a cylindrical portion, a lid portion, and a corner portion where the bottom wall portion and the peripheral wall portion of the cover intersect each other. Controller-integrated generator motor.   The controller-integrated generator motor according to claim 13, wherein the heat radiating member has a disk shape.   The controller-integrated generator motor according to claim 23, wherein a plurality of heat dissipating fins are formed radially on the heat dissipating member.   The controller-integrated generator motor according to claim 13, wherein the heat radiating member includes a bottom wall portion and a peripheral wall portion.   26. The controller-integrated generator motor according to claim 25, wherein a plurality of heat radiation fins are formed radially on at least the bottom wall portion.   The controller-integrated generator motor according to claim 13, wherein the controller is housed in any one of the housing, the cover, and a casing between the housing and the cover.   The controller-integrated generator motor according to claim 13, further comprising an exhaust flow prevention unit that prevents exhaust from the exhaust port of the housing from flowing toward the cover.   29. The controller-integrated generator motor according to claim 28, wherein the exhaust flow prevention unit is formed in the housing.   29. The controller-integrated generator motor according to claim 28, wherein the exhaust flow prevention unit is formed on the cover.   29. The controller-integrated generator motor according to claim 28, wherein the exhaust flow preventing portion is formed in a casing between the housing and the cover.

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