JP2000102221A - Control device one-piece-type dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the axial dimension of a control device one-piece-type dynamo-electric machine, where a control device is arranged nearly in parallel with an electric motor axis by making either of one end face in the axial direction of the dynamo-electric machine to nearly coincide with one end face of the control device. SOLUTION: A boss 2 for fixing a control device being formed on an electric motor 1 and a boss 4 for fixing being formed on a control device 3 are clamped together, by a mating bolt 5 to from a control device one-piece-type dynamo-electric machine, and at this time an end face 3A of the control device 3 and the left end of the electric motor 1 are arranged on surfaces that nearly coincide each other. Also, cooling channels 16 that are formed on the electric motor 1 and the control device 3 are connected with a U-shaped cooling pipe 6, thus composing a compact control device one-piece-type dynamo-electric machine without impairing servicing and maintenance properties of the electric motor 1 and the control device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor integrated with a control device for driving an electric vehicle, and more particularly to a combined arrangement structure of the motor and the control device. In addition, the technology can be applied to a hybrid vehicle equipped with an engine, and can be applied to all types of devices in which an output extracting device is added to a motor output shaft side regardless of whether it is for an automobile.

[0002]

2. Description of the Related Art As an example in which a motor body and a control device are integrated, a motor in which a control device is arranged on an end face on the side opposite to an output shaft of a motor as disclosed in Japanese Patent Application Laid-Open No. 5-292703,
As described in JP-A-6-197494, there is an electric motor in which a control device is arranged on a center frame of the electric motor, that is, substantially parallel to the axial direction of the electric motor. Each of these examples has a structure for integrating a motor main body and a control device via a heat sink to reduce the size of the motor system, to minimize lead wires, and to reduce radio noise and the like. Further, as a connecting means for integrally connecting the motor body and the control device, for example, as described in Japanese Patent Application Laid-Open No. 6-30547, a screw connection can be easily inferred.

However, considering the application of the control device-integrated electric motor having such a configuration to an electric vehicle, in the first known example, the control device-integrated electric motor is elongated in the axial direction and is difficult to be mounted between left and right wheels. Therefore, it is necessary to arrange the control device substantially in parallel with the motor shaft.

Further, since the heat sink is common to both the first and second known examples, the heat sink cannot be easily disassembled, and when the serviceability is emphasized, the motor main body and the control device main body are separated from each other, and screw connection or the like is performed. It is necessary to be configured so as to unite.

In an electric vehicle, a transmission or the like is generally mounted on a motor output shaft side to transmit a mechanical output to wheels to drive the vehicle. Further, when there is a strong restriction on space such as an electric vehicle, it is necessary to use a liquid-cooled drive system such as a water-cooled one.

[0006]

However, in a conventional rotary electric machine integrated with a control device in which the control device is disposed substantially in parallel with the motor shaft, in a conventional known example, the arrangement of the motor and the control device is specified. Nothing has been identified up to the cooling water flow path of the rotary electric machine integrated with the device.

SUMMARY OF THE INVENTION An object of the present invention is to provide an arrangement of a motor and a control device in which a control device is arranged substantially in parallel with a motor shaft and in which a dimension in an axial direction can be minimized after uniting in a rotary electric machine integrated with a control device. In particular, it is an object of the present invention to provide an arrangement of a motor and a control device having a minimum axial dimension when a torque conversion mechanism such as a transmission is mounted on a motor output shaft side.

Another object of the present invention is to provide a rotary electric machine integrated with a control device, each of which is of a liquid-cooled type and the control device is disposed substantially in parallel with the motor shaft, in which a cooling medium flow path between the motor and the control device is provided. It is to provide a structure capable of communicating in a compact manner.

Still another object of the present invention is to provide a rotation detection signal harness arrangement which does not receive noise from an armature lead wire and has good serviceability of the signal harness itself.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a control device-integrated dynamo-electric machine in which a control device is disposed substantially parallel to the axial direction of the dynamo-electric machine. Either one end face and the one end face of the control device are made to substantially coincide with each other.

More specifically, the one end face in the axial direction of the rotating electric machine and the end face on the power supply line connection side of the control device are made to substantially coincide with each other.

[0012] More specifically, the end face of the rotating electric machine on the side opposite to the output shaft substantially coincides with the end face of the control device. Further, in order to cope with the rotary electric machine integrated with the liquid cooling control device, the outlet or the inlet of the cooling medium of the rotary electric machine is provided in the center housing which holds the armature of the rotary electric machine.

Further, in order to make the outlet or the inlet of the cooling medium of the rotating electric machine and the inlet or the outlet of the cooling medium of the control device communicate with a compact hollow tube, the outlet or the inlet of the cooling medium of the rotating electric machine is cooled by the cooling device of the control device. It is formed by shifting the position of the medium from the inlet or the outlet in the axial direction.

As another example, an outlet or an inlet of a cooling medium of the rotating electric machine is provided on an end bracket in one of the axial directions of the rotating electric machine. More specifically, the end face of the end bracket opposite to the end bracket provided with the outlet or the inlet of the cooling medium of the rotating electric machine is made to substantially coincide with the end face of the control device.

Further, in order to improve noise resistance and serviceability, a rotation detection signal line for connecting the rotation detector of the rotating electric machine and the control device is arranged outside the housing.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to 2 and 3. FIG. 1 is an external side view of a liquid-cooled control apparatus-integrated dynamoelectric machine according to an embodiment of the present invention. FIG. 2 is an external front view, and FIG. 3 is a view showing an upper half section of a side view. In the figure, reference numeral 3 denotes a box-shaped control device that accommodates an inverter for converting DC power into AC power and supplying the AC power to the electric motor 1, a controller thereof, and the like, and has control device end faces 3A and 3B.

The boss 2 for fixing the control device formed on the electric motor 1 and the boss 4 for fixing formed on the control device 3 are fastened and united by a dowel 5 to form a rotary electric machine integrated with the control device. I do. As shown in FIGS. 1 and 3, the control device end face 3 </ b> A and the left end of the electric motor 1 are substantially on the same plane.

The cooling water passages formed in each of the electric motor 1 and the control device 3 are connected by a U-shaped cooling pipe 6. More specifically, an outlet or an inlet for the cooling medium is provided on the stator frame 14 of the electric motor 1, and an inlet or an outlet for the cooling medium of the control device 3 is provided on the same side as the outlet or the inlet. The cooling medium inlet or outlet of the device 3 is formed so as to be shifted in axial position.

The flow of the cooling water in the above configuration will be described. The cooling water flowing from the cooling water inlet 7 provided below the stator frame 14 of the electric motor 1 is used as a cooling water passage in the stator frame 14 which will be described in detail later. 16 flows from the outlet provided on the upper side of the stator frame 14 to the cooling water passage in the control device 3 via the cooling pipe 6 formed into a U-shape, and flows out from the cooling water outlet 8 provided in the control device 3. .
The motor 1 and the control device 3 are cooled by flowing water through the cooling water channel.

Next, the internal structure of a liquid-cooled type rotary electric machine integrated with a control device according to an embodiment of the present invention will be described with reference to FIG. Near the center of the shaft 9 in the axial direction,
A cylindrical rotor 10 is fixed. The inner ring sides of the bearings 11a and 11b are attached to both ends of the shaft 9. The outer rings of the bearings 11a and 11b are held by a front end bracket 12 and a rear end bracket 13, respectively. Therefore,
The rotor 10 and the shaft 9 are rotatably supported by the front end bracket 12 and the rear end bracket 13 by bearings 11a and 11b.

Each of the front end bracket 12 and the rear end bracket 13 is fitted into each end of the stator frame 14 by inlay and fastened with bolts or the like. The stator frame 14 has a substantially cylindrical shape, and an inner surface of a substantially central portion of the stator frame 14 includes:
The stator 15 is fixed. A cooling water passage 16 for cooling the electric motor 1 is formed on the outer surface of the stator frame 14 where the stator 15 is in contact.
A rotation detector 1 is provided on the end face of the rear end bracket 13.
7 is attached. As shown in FIG. 1, the signal harness 18 from the rotation detector 17 is routed on the outside so as to crawl the motor housing, and is guided to the control device 3. The stator 15 of the electric motor 1 is provided with an armature winding 15a. However, the armature winding 15a is wound around the stator core, so that the armature winding 15a has a shape protruding in the axial direction. is there.

The input lead wire 19 connected to the armature winding 15a has a protruding armature winding 15
The motor 1 is drawn out from the axial end, and it is inevitable to be any axial end of the electric motor 1 irrespective of the liquid-cooled electric motor. Therefore, the input lead wire 19 is drawn into the control device 3 through the through hole 20 formed at the end of the stator frame 14, and is connected to the terminal of the power switching element 21 constituting the inverter.

The input lead wire 19 should be as short as possible from the viewpoint of noise immunity, and the power switching element 21 needs to be arranged near the end of the control device 3. Also, the motor input lead wire 1
It is difficult to draw in the structure 9 in consideration of the serviceability of the control device.

Therefore, it is reasonable to draw the motor input lead wire 19 from the end 3A of the control device 3 inevitably. This means that the motor,
It is possible to refer to a general control device-integrated dynamoelectric machine formed by combining control devices formed separately.

In view of the necessity of the above-described motor structure and the necessity of the control device, it is preferable that the end face in the axial direction of the motor and the end face of the control device be substantially matched in the rotary electric machine integrated with the control device.

Since the controller 3 is mounted with components having lower heat resistance than the motor 1, the controller 3 generally has a larger volume than the motor. In consideration of the serviceability of the controller, it is better not to stack the components as much as possible. When it is set, the plane area becomes large.

Therefore, when the width of the control device is made substantially equal to the width of the motor, the length is often longer than that of the motor.
As in the embodiment of the present invention shown in FIG. 1, when one end surface of the electric motor 1 (the end surface of the rear end bracket 13) and the control device end surface 3A substantially coincide with each other, the opposite end surface 3
B has a structure protruding longer than the motor end face (the end face of the front end bracket 12).

Next, a case will be described in which the thus-configured electric motor integrated with a control device of the present invention is applied for driving an electric vehicle. In an electric vehicle, it is necessary to reduce the size and weight of a drive motor and a control device as much as possible in order to reduce the weight of the vehicle body. The output of the motor shaft is transmitted to wheels via a torque increasing device, that is, a speed reducing device. For this reason, a reduction gear is attached to the motor output side end. In consideration of the unique requirements of the electric vehicle, it is most compact to adopt a structure in which the overall length of the electric motor and the speed reducer and the overall length of the control device are substantially the same. That is, by making the end face of the electric motor on the side opposite to the output shaft substantially coincide with the end face of the control device, the motor can be made most compact.

In the embodiment of the present invention shown in FIG. 1, there is a space below the control device on the motor output shaft side, and the structure is such that a reduction gear can be arranged in this space. The structure is suitable for automobiles. Needless to say, the present invention can be applied to a hybrid vehicle equipped with an engine, and can be applied to all types in which an output extracting device is added to the motor output shaft side regardless of whether it is for an automobile.

Although not shown, the present invention does not intend to cover the case where the outlet or the inlet of the cooling medium of the motor is provided on the end bracket in either the axial direction of the motor as another embodiment. What is achieved is easily inferred.

More specifically, it is necessary to connect an end bracket water passage provided with an outlet or an inlet of a cooling medium of a motor to a water passage of a stator frame by a water leakage structure, and it is not possible to draw out an armature lead wire from this connection side. The structure becomes very complicated. Therefore, it can be easily inferred that the end face of the end bracket opposite to the end bracket provided with the outlet or the inlet of the cooling medium of the electric motor should substantially coincide with the end face of the control device.

According to this embodiment, there is an effect that a compact electric rotating machine integrated with a control device can be formed without impairing the serviceability and maintainability of each of the motor and the control device. Further, since the signal harness 18 from the rotation detector 17 is routed outside so as to crawl the motor housing and is guided to the control device 3, the signal harness 18 does not receive noise from the armature lead wires, It has the effect that the service itself is also very good.

[0033]

According to the present invention, since the reduction gear is arranged in the space below the control device on the motor output shaft side, the minimum axial dimension can be controlled when the torque conversion mechanism is mounted. There is an effect that a device-integrated drive device can be provided.

Further, according to the present invention, since the electric motor and the control device are united by bolts, they can be easily disassembled, and there is an effect that serviceability and maintainability are not impaired.

Further, there is an effect that noise from the armature lead wire is not received and the serviceability of the signal harness itself is very good.

[Brief description of the drawings]

FIG. 1 is an external side view of a liquid-cooled control apparatus-integrated dynamoelectric machine according to an embodiment of the present invention.

FIG. 2 is an external front view of FIG.

FIG. 3 is an upper half sectional view of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 motor 2 motor-side fixing boss 3 controller 4 control device-side fixing boss 5 bolt 6 U-shaped cooling pipe 7 cooling water inlet 8 cooling water inlet 9 shaft 10 rotor 11a, 11b bearing 12 front end bracket 13 rear side End bracket 14 Stator frame 15 Stator 15a Armature winding 16 Cooling water passage 17 Rotation detector 18 Rotation detection signal harness 19 Input lead wire 20 Through hole 21 Power switching element

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Hamano 2520 No. Odaiba, Hitachinaka-shi, Ibaraki Inside the Automotive Equipment Division of Hitachi, Ltd. (72) Inventor Tadaaki Iiyama 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa F-term (reference) 5H605 AA01 BB05 DD13 5H609 BB11 PP02 PP06 PP16 QQ04 QQ18 RR37 5H611 AA09 BB01 TT01 UA01

Claims (9)

[Claims] In a control device-integrated rotary electric machine having a control device arranged substantially parallel to the axial direction of the rotary electric machine, one end face of the rotary electric machine in the axial direction is substantially coincident with one end face of the control apparatus. A rotary electric machine integrated with a control device. 2. The rotary electric machine integrated with a control device according to claim 1, wherein one end surface of said rotary electric machine in the axial direction substantially coincides with an end surface of said control device on a power line connection side. 3. The controller-integrated dynamoelectric machine according to claim 1, wherein an end surface of the dynamoelectric machine on the side opposite to the output shaft substantially coincides with an end surface of the control device. 4. A rotary electric machine integrated with a control device, wherein a control device is disposed substantially parallel to an axial direction of the rotary electric machine, wherein a rotation detection signal line connecting a rotation detector of the rotary electric machine and the control device is provided outside the housing. A rotary electric machine integrated with a control device, characterized by the arrangement. 5. A liquid-cooled control device-integrated rotating electric machine in which a cooling medium outlet of a rotating electric machine and a cooling medium inlet of a control device communicate with each other through a hollow tube, wherein the cooling medium outlet or inlet of the rotating electric machine is provided. Is provided in a center housing that holds an armature of the rotating electric machine. 6. The rotating electric machine according to claim 5, wherein either an outlet or an inlet of the cooling medium of the rotating electric machine and either an inlet or the outlet of the cooling medium of the control device are provided on the same side of the rotating electric machine. Liquid-cooled control device integrated rotary electric machine. 7. The liquid according to claim 6, wherein an axial direction of one of an outlet or an inlet of the cooling medium of the rotating electric machine and an axial direction of one of the inlet or the outlet of the cooling medium of the control device are provided. A rotary electric machine with a cold control unit. 8. A liquid-cooled control device-integrated dynamo-electric machine in which a cooling medium outlet of the dynamo-electric machine and an inlet of a cooling medium of the control device are communicated by a hollow tube. Is provided on one of end brackets in the axial direction of the rotating electric machine. 9. The liquid cooling system according to claim 8, wherein an end face of the end bracket opposite to an end bracket provided with an outlet or an inlet of a cooling medium of the rotary electric machine and the end face of the control device substantially coincide with each other. Rotary electric machine with integrated shape controller.