JP2540806B2 - Vehicle drive - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel drive device for a vehicle with a turbocharger, in which an electric motor is attached to a brake drum of a wheel to drive the vehicle.

(Prior Art) Currently, the majority of vehicles running in the city are mostly vehicles that run by rotating an axle and driving wheels by using an internal combustion engine as a driving force. From the power supply
Electric power is supplied to the electric motor that drives the axles, and the wheels are rotated to provide the running force of the vehicle.

In addition, a method has been devised in which energy generated by exhaust gas from an internal combustion engine is regenerated as electric energy, and an electric motor is driven by this electric power to be used as a means for increasing the running force of a vehicle.

As a method of driving wheels by electric power,
Permanent magnets are radially arranged on the wheels to fixedly install a rotor that forms magnetic poles, and the stator is fixedly attached to the axle or vehicle body, and the storage battery supplies power to the stator to generate rotational force on the wheels. Japanese Patent Laid-Open No. 52-22214 discloses a proposal for a drive device for an electric vehicle.

(Problems to be Solved by the Invention) In the proposal disclosed in Japanese Patent Laid-Open No. 52-22214, a DC machine using a storage battery provided in a vehicle as a power source is used to regenerate exhaust energy into AC power. When used for an energy recovery device, there is a problem that the regenerated electric power is rectified into a low-voltage direct current. Further, in the above proposal, there is a problem that a switching power supply mechanism for DC power is required when driving a rotor having permanent magnets.

The present invention has been made in view of these problems, and an object thereof is to provide a wheel drive device that operates with an AC power supply and that drives wheels without requiring a power supply switching supply mechanism.

(Means for Solving the Problems) According to the present invention, the turbine is arranged in the middle of the exhaust path of the engine for driving the vehicle, and the generator is operated by the rotational force of the turbine rotated by the exhaust gas. In a vehicle drive device equipped with a turbocharger for recovering exhaust energy, a rotor provided with a cage coil inside a magnetic body formed in an annular cylindrical shape is attached to a brake drum of a wheel and corresponds to the rotor. An induction rotating electric machine in which a stator having a multi-phase winding is provided on the vehicle body side, control means for controlling the operation of the induction rotating electric machine by electric power generated by the generator, and the rotating electric machine when braking the vehicle. There is provided a drive device for a vehicle, comprising: a control unit that operates a generator to assist the braking operation; and a power storage unit that stores the power generated by the rotating electric machine. Be done.

(Operation) According to the present invention, a ring-shaped cylindrical magnetic body having a cage coil on the inner surface is attached to a brake drum of a wheel as a rotor, and a stator corresponding to the rotor is provided with multiphase windings to form a vehicle body. Since the induction machine is mounted on the side, the wheels are driven by energizing the multiphase windings. During braking, the induction machine is used as a generator to assist the braking operation.

(Example) Next, the Example of this invention is described in detail using drawing.

FIG. 1 is a sectional view showing the configuration of an embodiment of a wheel drive device according to the present invention, and FIG. 2 is an explanatory view of its rotor and stator.

In FIGS. 1 and 2, reference numeral 1 denotes an axle for driving the wheels by transmitting power of an internal combustion engine mounted on a vehicle, one end of which is connected to a power transmission mechanism, for example, a differential gear device, At the other end, a brake drum 2 to which a disc wheel 3 of a wheel is attached is provided. Reference numeral 4 denotes a cover shaft, which is held on the vehicle body side by a predetermined suspension device and supports the axle 1 by a bearing 4a. 3a is a tire, which is attached to the outer circumference of the disc wheel 3 to form a wheel.

Reference numeral 5 denotes a rotor of the electric motor, which is attached to the inner surface of the drum portion of the brake drum 2. A magnetic body made of an annular silicon steel plate is laminated in a cylindrical shape, and the inner portion of the cylindrical shape has a basket shape of an induction machine. A plurality of metal rods 5a to be coils are planted at equal intervals over the entire circumference. Reference numeral 5b is a short ring made of a good conductor of electricity, which is provided on both side surfaces of the rotor 5 and electrically connects the end portions of all the metal rods 5a implanted.

Reference numeral 6 is a stator corresponding to the rotor 5, and is composed of a stator core 6a made of a magnetic material and a winding wire 6c. The stator core 6a has a plurality of salient poles 6b arranged radially corresponding to the rotor 5 having a cage coil, and its center is fixed to the end of the cover shaft 4. A winding 6c, which is a multi-phase circuit, is wound around the salient pole 6b, and when the winding 6c is energized, a rotating magnetic field is generated in the stator core 6a to rotate the rotor 5.

7 is an electric motor cover, which is attached to the cover shaft 4,
It is formed so as to cover the stator 6 and the rotor 5.

FIG. 3 is a block diagram showing an example of a configuration of related members for operating the present embodiment, and shows an example of driving the rotor of the present embodiment by a generator provided in an engine turbocharger. .

In FIG. 3, an exhaust housing B1 of a turbocharger B is attached to an exhaust pipe A1 of an engine A, and a turbine blade B2 is driven by energy of exhaust gas discharged from the engine A. Then, by driving the compressor blade B3 provided coaxially with the turbine blade B2, the supercharged air is pressure-fed to the engine A through the intake pipe A2. Further, a generator C is provided between the turbine blade B2 and the compressor blade B3, and when the turbine blade B2 is driven by the energy of the exhaust gas, electric power generated by the operation of the generator C will be described later. Sent to D.

E is a rotation sensor, which is attached to the cover shaft 4, detects the number of rotations of the axle 1, and transmits a detection signal to the controller D.

The controller D is composed of a microcomputer, and its input / output device has a converter and a rectifier, converts the frequency of the electric power sent from the generator C,
It is supplied to the winding 6c provided on the stator 6. Then, by the program stored in the memory of the microcomputer,
Corresponding to the detection signal from the rotation sensor E, it is converted into electric power of a frequency for causing the rotor 5 to perform powering and sent to the winding 6c of the stator 6.

Note that F is a battery that supplies power to the controller D, and when the battery F is charged, a part of the power generated by the generator C is rectified and charged via the controller D.

Next, the operation of the present embodiment thus configured will be described.

When the turbine blade B2 is rotationally driven by the energy of the exhaust gas discharged from the engine A, the generator C provided coaxially operates to generate electric power and transmits the electric power to the controller D. A detection signal based on the rotation speed of the axle 1 from the rotation sensor E is input to the controller D, and the frequency of the electric power transmitted corresponding to this detection signal is converted into an AC frequency for powering the rotor 5. , Winding of stator 6
Supply to 6c. Therefore, when the rotor 5 is driven by power, the tire 3a is driven through the brake drum 2 and the disc wheel 3 to assist the running force of the vehicle.

On the other hand, during braking while the vehicle is running, the rotation sensor E so that the rotor 5 and the stator 6 operate as an induction generator.
The controller D controls the winding 6c of the multi-phase circuit in response to the detection signal from. Then, after rectifying the generated AC power from the winding 6c, the AC power is transmitted to the battery F for charging.

In the above description, the wheel drive device is used to assist the running force of the vehicle driven by the engine torque, but the wheel drive device is driven by the electric output of the engine directly driven by the engine mounted on the vehicle. The device may be driven and used as the main driving force of the running force.

Although the present invention has been described with reference to the embodiments, various modifications can be made within the scope of the gist of the present invention, and these modifications are not excluded from the scope of the present invention.

(Effects of the Invention) The present invention mounts a ring-shaped cylindrical magnetic body having a cage coil on a brake drum of a wheel to form a rotor, and mounts a stator having a multiphase winding on the vehicle body side to directly drive the wheel. Since it is an electric motor and is controlled by a rotation sensor that detects the number of rotations of the wheels, it does not require a power supply switching supply mechanism because it is not a low-voltage DC power supply when driving, and it always rotates according to the rotation situation of the wheels. There is an effect that the child can be driven to drive the wheels.

There is also an advantage that the braking force can be recovered as electric energy when the vehicle is braked.

[Brief description of drawings]

FIG. 1 is a sectional view showing the construction of an embodiment of a wheel drive device according to the present invention, FIG. 2 is an explanatory view of its rotor and stator, and FIG. 3 is a construction of related members for operating this embodiment. It is a block diagram showing an example. 1 ... axle, 2 ... brake drum, 3 ... disk wheel, 5 ... rotor, 5a ... metal rod, 5b ... short ring, 6 ... stator, 6c ... winding.

Claims (1)

(57) [Claims] 1. A vehicle having a turbocharger for arranging a turbine in the middle of an exhaust path of an engine for driving a vehicle, and operating a generator by a rotational force of the turbine rotated by exhaust gas to recover exhaust energy. In the driving device of (1), a rotor having a cage coil inside a magnetic body formed in an annular cylindrical shape is attached to a brake drum of a wheel, and a stator having a multiphase winding corresponding to the rotor is attached to the vehicle body side. An induction rotating electric machine provided in the vehicle, a control means for controlling the induction rotating electric machine to operate with the electric power generated by the generator, and a driving operation of the rotating electric machine to assist the braking operation when the vehicle is braked. A drive device for a vehicle, comprising: a control unit; and a power storage unit that stores the power generated by the rotating electric machine.