JPS62265023A - Wheel driving device - Google Patents

Abstract

PURPOSE:To drive a wheel by an AC power supply with a simple construction, by mounting a conductive disk with strip-shaped spaces defined radially therethrough serving as the rotor of a rotary machine on the wheel and mounting a stator on a body. CONSTITUTION:A conductive disk with strip-shaped spaces 5a defined radially therethrough is co-axially mounted on a wheel shaft 1 as a rotor 5 and a stator 6 corresponding to it is mounted on a body and they constructs an a.c. machine MG. In the arrangement, exhaust gas from an engine A causes the a.c. machine C and a generator F to generate AC power through a turbine B, and a controller D converts the power so that it is supplied to a coil 62 with a frequency and a phase corresponding to a signal sensed by a rotary sensor of a wheel shaft 1. Then, alternating magnetic flux is produced in a fixed core 61 to cause the rotor 5 to rotate, whereby the wheel shaft 1 is rotated. With this arrangement, the wheel shaft 1 can be rotated by an AC power supply with a simple construction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wheel drive device in which a rotor of a rotating electric machine is provided on an axle.

(Prior technology) Currently, most of the vehicles that run on the ground are driven by an internal combustion engine that rotates the axle and drives the wheels. Electric power is supplied from the power supply to the electric motor that drives the axle, which rotates the wheels and provides driving force for the vehicle.

In addition, a method has been devised in which energy from exhaust gas from an internal combustion engine is recovered as electrical energy, and this electrical power is used to drive an electric motor to enhance the running power of a vehicle.

As a method of driving wheels using electric power, a rotor of an electric motor is provided in place of the rotating part of the brake of the wheel, a stator is provided in place of the fixed part of the brake, and further,
A special proposal is made for an electric wheel drive device for an automobile using a parallel-axis magnetic field motor in which the rotor is provided with permanent magnets having star-shaped pole pieces and the stator is provided with windings corresponding to the rotor. It is disclosed in Japanese Patent Publication No. 57-77222.

(Problems to be Solved by the Invention) The proposal shown in Japanese Patent Application Laid-Open No. 57-77222 mentioned above is a DC machine that uses a battery mounted on a vehicle as a power source, and regenerates exhaust energy into AC power. When used in an energy recovery device, a problem arises in that the regenerated power must be rectified and then supplied.

Furthermore, although the above proposal is brushless, the configuration of the parallel-axis magnetic field motor is complicated and the cost is high.

The present invention has been made in view of these problems,
The purpose is to provide a wheel drive device that operates on AC power and has a simple rotor and stator configuration.

(Means for Solving the Problems) According to the present invention, a conductor disk in which rectangular spaces are radially perforated is attached to an axle as a rotor of a rotating electric machine, and a polyphase winding corresponding to the rotor is mounted. A wheel drive device is provided in which a stator having a wire is provided on a vehicle body side.

(Function) According to the present invention, a conductor disk in which a plurality of rectangular spaces are radially bored throughout the entire area is used as a rotor.
An alternating current machine that serves as a rotating electrical machine is constructed by directly connecting the axle and having a core having polyphase windings corresponding to the rotor as a stator on the car body.When AC power of a predetermined frequency is supplied, the alternating current machine will turn off. Furthermore, by controlling the multiphase windings of the stator, the braking force during braking is regenerated as electric power.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of a wheel drive device according to the present invention, FIG. 2 is a plan view of its rotor, and FIG. 3 is an exploded perspective view of a stator.

In FIG. 1, reference numeral 1 is an axle, which receives power from an internal combustion engine mounted on a vehicle and drives the wheels.
One end thereof is connected to a power transmission device, such as a differential gear device, and the other end is attached to a disc wheel 2 that holds a tire 3 of the wheel. 4 is a cover shaft, which is held on the vehicle body side by a predetermined suspension device;
The axle 1 is supported by a bearing 4a.

Reference numeral 5 denotes a disc-shaped rotor made of a metal plate that is a good electrical conductor, and is attached to the axle 1 so that its axis is aligned with the axle 1. As shown in FIG. 2, a plurality of equidistant rectangular spaces 5a are provided radially over the entire area, forming a rotor of an alternating current machine serving as a rotating electric machine.

Reference numeral 6 denotes a stator corresponding to the rotor 5, and a stator core 6 having a U-shaped cross section sandwiching a portion including the space 5a provided in the rotor 5.
1, and a stator coil 62 provided in the stator core 61.
It has The stator core 61 has the space 5
Convex poles 61a are provided over a predetermined area at intervals as shown in FIG.
A stator coil 62 is provided with a winding in which individual convex poles 61a are wound and sequentially overlapped. Note that lead wires are drawn out from the stator coil 62 so as to form a multiphase circuit, and the stator 6 and rotor 5 constitute an alternating current machine MG that becomes a multiphase generator-motor.

Note that the stator 6 is attached to the AC machine housing 11,
It is fixed to the cover shaft 4 of the axle l.

A rotation sensor 1a detects the rotation speed of the axle l and sends a detected detection signal to a controller to be described later.

FIG. 4 is a block diagram showing an example of the configuration of related members for operating this embodiment. Although not shown, the rotor 5 is attached to the axle l, and the stator 6 is installed inside the AC machine housing 11. The multiphase circuit of the stator coil 62 is connected to a controller to be described later.

In FIG. 4, an exhaust housing B1 of a turbocharger B is attached to an exhaust pipe At of an engine A, and the energy of exhaust gas discharged from the engine A drives a turbine blade B2.

Then, by driving the compressor blade B3 provided coaxially with the turbine blade B2, the supercharging air is transferred to the suction pipe A2.
The fuel is pumped to engine A via the Further, an alternating current machine C is provided coaxially with the turbine blade B2, and when the turbine blade B2 is driven by the energy of the exhaust gas, the alternating current machine C operates as a generator, and the generated alternating current power is generated as will be described later. Power is transmitted to controller D.

E is an exhaust turbine having a generator F, which is connected to the exhaust port of the exhaust housing Bl of the turbocharger B, and the blades El are driven by the exhaust energy after driving the turbine blades B2. And blade E
When the generator F provided coaxially with the controller 1 is driven, the generated power is sent to the controller D.

Controller D is composed of a microcomputer, a converter for high voltage, an inverter, a rectifier, etc. Then, according to the program stored in the memory of the microcomputer, the input output power from the alternator C and the power generator @F is converted into an alternating current frequency and is transmitted to the stator coil 62 provided in the alternator housing 11. Or, it is converted into direct current to charge the battery G.

In addition, battery G supplies power to controller D, and according to the program in the memory of controller D's microcomputer, when engine A is at low rotation speed and high output is required, the DC from battery G is converted to AC power at a predetermined frequency. The supercharged air is converted and supplied to the alternating current machine C of the turbocharger B, which drives the compressor blade B3 to force the supercharged air to the engine A to increase its output.

On the other hand, the frequency of the AC power transmitted to the stator coil 62 is converted to a predetermined frequency according to the detection signal from the rotation sensor 1a provided on the axle l. The AC power from the coil 62 is configured to be transmitted to the controller D.

Next, the operation of this embodiment configured as described above will be explained.

When the turbine blade B2 and the blade El are rotationally driven by the energy of the exhaust gas discharged from the engine A, an alternating current machine C and a generator F are installed on the same axis.
generates alternating current power and transmits each generated power to controller D. A controller D having a converter converts the transmitted power into power having the same frequency and the same phase, and adds the power to form a composite power. Then, in response to the detection signal of the rotation sensor la installed on the axle l, the frequency and phase of this combined power are controlled, and converted into flame current power that is fed to the alternator MG, and fixed to the alternator MG. It is supplied to the child coil 62. Therefore, an alternating magnetic flux that moves the rotor 5 is generated in the stator core 61 sandwiching the rotor 5, thereby driving the rotor 5. Therefore, the axle l directly connected to the rotor 5 assists the running force of the tires 3.

On the other hand, when braking while the vehicle is running, the stator coil 62 of the polyphase circuit is controlled in response to the detection signal from the rotation sensor la so that the alternator MG operates as an induction generator. Then, the stator coil 6 inputted to the controller D
After rectifying the alternating current power from 2, it is sent to battery G for charging.

In this way, when braking, the alternating current machine MG installed on the axle l converts the braking force into electrical energy to charge the battery, and is also driven by the electrical energy recovered from the exhaust energy to increase the running power. It operates to strengthen the.

In this example, a wheel drive device was used to assist the running power of the vehicle, which is driven by the torque of the internal combustion engine. The wheel drive device may be driven and used as the main driving force for the traveling force.

The present invention has been described above with reference to one embodiment. However, within the scope of the gist of the present invention, for example, a ferromagnetic material may be charged in the space of the rotor 5 of the alternating current machine MG, and the magnetic resistance in the axial direction of the rotor 5 may be Various modifications can be made, such as reducing the amount, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As explained in detail above, the present invention provides a rotor for an alternating current machine serving as a rotating electric machine, in which a conductor disk in which a plurality of rectangular spaces are radially bored is directly connected to an axle, and Since a stator having multiphase windings corresponding to the stators is provided on the vehicle body side, the alternator can be efficiently operated as an induction motor or an induction generator depending on the operating state of the engine and the running state of the vehicle. .

Furthermore, according to the present invention, the rotor of the alternating current machine has a very simple configuration, and the stator does not require a complicated configuration.
This has the effect of reducing the cost of the alternator.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a wheel drive device according to the present invention, FIG. 2 is a plan view of its rotor, FIG. 3 is an exploded perspective view of a stator of the wheel drive device, and FIG. 4 FIG. 2 is a block diagram showing an example of the configuration of related members that operate the present embodiment. ■... Axle, 2... Disc wheel, 5... Rotor, 5a... Space, 6... Stator, 61... Stator core, 62... Stator coil, MG ...AC machine.

Claims (1)

[Claims] The present invention is characterized in that a conductor disk in which strip-shaped spaces are bored radially is attached to an axle as a rotor of a rotating electric machine, and a stator having a multiphase winding corresponding to the rotor is provided on the vehicle body side. Wheel drive.