JP2004304902A - Motor generator mounting structure - Google Patents

Abstract

An object of the present invention is to provide a motor-generator mounting structure that can achieve good assembling workability and maintainability with a simple configuration.
A motor generator is fixedly mounted on an upper portion of an engine, and a terminal block having openings on an upper side and a side opposite to an inverter device is arranged on the upper portion of the motor generator. The power cables 27a to 27c are connected to AC terminals 39a to 39c exposed from the terminal block 35 through the openings 36 and 37, respectively. Accordingly, the work of connecting the terminals of the power cables 27a to 27c at the time of assembling the motor generator 10 can be performed from above the engine 3 without bending the power cables 27a027c. Can be improved.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a motor generator mounting structure to which a power cable such as a large-capacity power cable is connected in parallel with an engine.
[0002]
[Prior art]
In recent years, in vehicles, simple hybrid systems using motor generators, electric four-wheel drive systems, electromagnetically driven valves, electric power steering, electric car air conditioners, electric brakes, electric chassis controls, windshield defrosters, seat heaters, etc. For the purpose of realizing each equipment of high quality, it is studied to increase the rated voltage of on-board auxiliary equipment from 14V to 42V, and accordingly, the on-board battery voltage from 12V to 36V It is being studied to increase the pressure.
[0003]
During the transition period to such an increase in the auxiliary equipment, the increase in the cost of the auxiliary equipment can be enjoyed by the increase in the auxiliary equipment in order to suppress the rise in cost due to the change of the auxiliary equipment. It is desirable to be introduced step by step. In this case, as one of the greatest merits expected by increasing the pressure of the auxiliary devices, it is conceivable to improve the fuel efficiency by constructing a simple hybrid system using a high-output motor generator. Therefore, in recent years, both a 36V battery and a 12V battery are mounted, and for example, a motor generator, an electromagnetic clutch, an electric oil pump for an automatic transmission, etc. are driven by the 36V battery, and other accessories are driven by the 12V battery. Has been proposed and put to practical use.
[0004]
By the way, in a vehicle provided with a 36V battery and a 12V battery as described above, it is difficult to mount both batteries simultaneously in a narrow engine room. When a motor generator is used in a vehicle, it is necessary to newly install an inverter device. Further, in order to reduce the voltage generated by the motor generator and supply power to a 12V battery or the like, it is necessary to newly install auxiliary equipment such as a DC-DC converter.
[0005]
To cope with these problems, for example, in Non-Patent Document 1, a 36V battery and a 12V battery are arranged in a luggage room, and the respective batteries are arranged in the luggage room. A technique of disposing a power control unit in which a DC-DC converter is integrally provided below an inverter device is disclosed.
[0006]
Further, as a mounting structure of a motor generator connected to an inverter device of this type of power control unit, for example, in Non-Patent Document 2, a power control unit is fixedly mounted on a side of an engine and is mounted on a side of the motor generator. A technique is disclosed in which a power cable extending from a power control unit via the front of an engine is connected to an arranged terminal block.
[0007]
[Non-patent document 1]
Edited by Toyota Motor Co., "Crowne, Crown Majesta, Crown Estate New Model Manual" Published August 20, 2001, P0-2, P1-2-1-7, P1-12-1-21
[0008]
[Non-patent document 2]
Edited by Toyota Motor Corporation "Crown, Crown Majesta, Crown Estate Repair / Supplementary Edition" Published August 20, 2001, P84-54 to P84-59
[0009]
[Problems to be solved by the invention]
However, since the power cable connecting the motor generator and the inverter device is generally constituted by a high-rigidity, large-diameter power cable, as in the technique disclosed in the above-mentioned Non-Patent Document 2, the power cable is connected in a narrow engine room. Connecting the power cable to the terminal block while bending the power cable from the front of the engine to the side, deteriorates the workability of assembling and maintenance of the motor generator.
[0010]
Also, in order to prevent the terminals of the motor generator from being wetted, salted, and in contact with human beings, it is general that the terminal block is covered with a terminal cover. Performing the work of assembling the terminal cover on the side of the motor generator in a narrow engine room becomes a factor of deteriorating the workability of assembling and maintenance of the motor generator.
[0011]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a motor generator mounting structure that can achieve good assembling workability and maintainability with a simple configuration.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is a motor generator mounting structure that is attached to an engine and connected to an inverter device via a power cable, wherein the motor generator is fixedly mounted on an upper portion of the engine. In addition, a terminal block having an opening at an upper portion and a side portion facing the inverter device is disposed at an upper portion of the motor generator, and the power cable is connected to a terminal exposed from the terminal block.
[0013]
According to a second aspect of the present invention, in the motor generator mounting structure according to the first aspect, a terminal cover that covers the terminal block and closes an opening of the terminal block is mounted on the engine. It is characterized in that it is integrally formed with the engine cover.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view showing a main part in an engine room, FIG. 2 is a front view showing an engine and a power control unit, and FIG. 3 is a schematic configuration diagram of an electric circuit mounted on a vehicle. FIG. 4 is an exploded perspective view showing an engine to which a motor generator is fixed and an engine cover.
[0015]
In FIG. 1, reference numeral 1 indicates a vehicle body such as an automobile. In the present embodiment, the vehicle 1 has various 42V loads such as a motor generator 10 (described later) and an electric oil pump (not shown) whose rated voltage is set to, for example, 42V, and a rated voltage set to, for example, 14V. Various 12V loads such as a lamp bulb (not shown) and audio equipment (not shown) are mounted. By mounting a 42V load such as the motor generator 10, a simple hybrid system capable of realizing an idle stop function and the like with high quality is constructed in the vehicle body 1.
[0016]
Further, in order to supply electric power corresponding to each electric load having a different rated voltage, a 36V battery 5 and a 12V battery 6 are mounted on the vehicle body 1 in a luggage room (not shown) (see FIG. 3). .
[0017]
As shown in FIGS. 1 and 2, the motor generator 10 is provided in the engine room 2 in the front part of the vehicle body 1 and in addition to the engine 3. It is connected to the crank pulley 3a of the engine 3 via a belt that is not used.
[0018]
In the engine room 2, a power control unit 20 is disposed on the side of the motor generator 10 (on the left side in the example of FIG. 1).
[0019]
As shown in FIG. 3, the power control unit 20 includes an inverter device 21 and a DC-DC converter 22 integrally provided with the inverter device 21.
[0020]
The inverter device 21 includes an intelligent power module 23, an excitation circuit 24, and a motor controller 25, which are integrally housed in an inverter case 50 to form a main part.
[0021]
The intelligent power module 23 is connected to the U, V, and W phases of the stator coil 15 disposed in the motor generator 10 via large-capacity power cables (power cables) 27a to 27c, It is externally connected to the 36V battery 5 via power lines 31a and 31b, and performs AC / DC conversion between the motor generator 10 and the 36V battery 5.
[0022]
The excitation circuit 24 is externally connected to the rotor coil 16 disposed in the motor generator 10 via a power line 28, and supplies an excitation current to the rotor coil 16.
[0023]
The motor controller 25 is connected via a harness 29 to the rotation sensor 17 and the temperature sensor 18 disposed in the motor generator 10 and a harness (not shown) to an idle stop control device and the like (not shown). , And controls the phase of the intelligent power module 23 and the exciting current of the exciting circuit 24 based on various input signals.
[0024]
The DC-DC converter 22 has a converter main body 26, and the converter main body 26 is housed in a converter case 51 integrally provided with the inverter case 50 to form a main part.
[0025]
The converter main body 26 is for reducing the DC voltage of 36V to a DC voltage of 12V, is connected to the intelligent power module 23 inside the inverter case 50, and is externally connected to the 12V battery 6 via the power line 32. Have been.
[0026]
The power control unit 20 controls the motor generator 10 to selectively function as a generator or a motor by performing control based on a signal from an idle stop control device or the like. That is, during traveling or the like, the inverter device 21 makes the motor generator 10 function as a generator by adjusting the charging pressure and the amount of power generation by switching control or the like, and charges the 36V battery 5 with electric energy. The inverter device 21 also charges the 12V battery 6 with electric energy via the DC-DC converter 22. On the other hand, when the engine 3 is restarted from idle stop or the like, the inverter device 21 controls the power supply from the 36V battery 5 to cause the motor generator 10 to function as a motor.
[0027]
Next, a detailed mounting structure of motor generator 10 in the present embodiment will be described.
[0028]
As shown in FIGS. 1 and 2, in the present embodiment, the engine 3 is a horizontally opposed engine that is vertically disposed with respect to the vehicle body 1, and the motor generator 10, together with the compressor 12, is located in front of the intake manifold 3 b. It is fixed on the upper part of the engine 3.
[0029]
Here, as shown in FIGS. 1, 2, and 4, in the present embodiment, an inverter device 21 constituting the power control unit 20 is disposed on the side of the engine 3 so as to face the motor generator 10. Power cables 27 a to 27 c connected to the upper part of the device 21 extend to the motor generator 10 side. That is, a terminal block 59 facing the motor generator 10 is fixed on the upper surface of the inverter case 50, and the power cables 27a to 27c are connected to three-phase AC terminals 56a to 56c arranged on the terminal block 59. Are connected to terminals, respectively, and the other ends of the power cables 27a to 27c are extended toward the motor generator 10 side.
[0030]
As shown in FIGS. 1, 2, and 4, the motor generator 10 has a terminal block 35 for connecting the other end of each of the power cables 27 a to 27 c extended from the inverter device 21. Is fixed to the upper part of the motor generator 10 in a state facing the terminal block 59 of the inverter device 21.
[0031]
The terminal block 35 is constituted by a substantially box-shaped terminal block having openings 36 and 37 respectively opened at an upper portion and at a side portion facing the inverter device 21 (terminal block 59). The set terminal surface 38 is exposed to the outside through the openings 36 and 37. Further, on the terminal surface 38, three-phase AC terminals 39a to 39c connected to the U-phase, V-phase, and W-phase of the stator coil 15 inside the motor generator 10 are arranged along the front-rear direction of the vehicle body 1. Have been.
[0032]
The power cables 27a to 27c are electrically connected to the AC terminals 39a to 39c at the other ends thereof by an attaching operation through the openings 36 and 37, thereby electrically connecting the motor generator 10 and the inverter device 21 to each other. It is supposed to connect. At this time, as shown in FIG. 2, the power cables 27a to 27c are bent up and down between the motor generator 10 and the inverter device 21, and the bending of the power cables 27a to 27c Vibration, vibration of the engine 3 and the like are prevented from being transmitted between the motor generator 10 and the power control unit 20, so that damage to the power control unit 20 and the like due to vibration and the like is prevented, and It is designed to reduce noise.
[0033]
As shown in FIG. 4, an engine cover 41 is mounted on the upper portion of the engine 3, and the motor generator 10 and the compressor 12 are accommodated inside the engine cover 41. In the present embodiment, on the back surface of the engine cover 41, a terminal cover 42 for closing the openings 36 and 37 of the terminal block 35 and protecting the terminal block 35 from water, salt damage, human contact and the like is provided. The terminal cover 42 is formed integrally with the terminal block 35 at the same time that the engine cover 41 is mounted on the engine 3.
[0034]
According to such an embodiment, the motor generator 10 is fixed to the upper part of the engine 3, and the terminal block 35 having openings 36 and 37 on the upper part and on the side facing the inverter device 21 is connected to the motor generator 10. The power cables 27a to 27c are connected to the AC terminals 39a to 39c exposed from the terminal block 35 through the openings 36 and 37, respectively. The work of connecting the terminals of the cables 27a to 27c can be easily performed from above the engine 3 without greatly bending the power cables 27a to 27c, and the workability of assembling the motor generator 10 can be improved.
[0035]
Also, the work of assembling the terminal cover 42 to the terminal block 35 when assembling the motor generator 10 can be performed from above the engine 3 in the same manner, so that the assembling workability can be further improved. In this case, the engine cover 41 and the terminal cover 42 can be easily integrally formed structurally, and by integrally forming them, the number of parts can be reduced, the manufacturing cost of the terminal cover 42 can be reduced, and assembly can be performed. Simplification of the process and the like can be realized.
[0036]
Further, by forming the terminal cover 42 integrally with the engine cover 41, the engine cover 41 can be supported on the engine 3 via the motor generator 10 in the middle of the engine cover 41. The support rigidity of the cover 41 can be improved.
[0037]
【The invention's effect】
As described above, according to the present invention, good assembling workability and maintainability of the motor generator can be realized with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main part in an engine room. FIG. 2 is a front view showing an engine and a power control unit. FIG. 3 is a schematic configuration diagram of an electric circuit mounted on a vehicle. FIG. Exploded perspective view showing an engine and an engine cover [Description of reference numerals]
3. Engine 10 Motor generator 21 Inverter devices 27a to 27c Power cable (power cable)
35 ... terminal blocks 36, 37 ... openings 39a-39c ... AC terminals (terminals)
41 ... engine cover 42 ... terminal cover

Claims (2)

In the mounting structure of the motor generator which is attached to the engine and connected to the inverter device via the power cable,
While fixing the motor generator above the engine,
A terminal block whose upper part and a side part facing the inverter device are open is arranged at the upper part of the motor generator,
A motor generator mounting structure, wherein the power cable is connected to a terminal exposed from the terminal block. 2. The motor generator mounting structure according to claim 1, wherein a terminal cover which is mounted on the terminal block and closes an opening of the terminal block is formed integrally with an engine cover mounted on the engine.

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