Motor vehicle driving system

Abstract

The invention relates to a motor vehicle driving system which comprises at least two inverter circuits, a vehicle control unit, a motor main controller, a pulse width modulation circuit, a driving circuit and a driving motor. The driving motor comprises a stator and a rotor; the stator is wound with at least two sets of windings; the vehicle control unit is electrically connected with the motor main controller and is used for acquiring an accelerator pedal signal and converting the accelerator pedal signal into a torque command; the motor main controller is also electrically connected with the pulse width modulation circuit and is used for controlling the pulse width modulation circuit to output a preset duty ratio to the driving circuit according to the torque command to enable the driving circuit to drive each inverter circuit so that each inverter circuit inverts direct current output by a power battery into alternating current, and providing the alternating current to each corresponding winding of the driving motor to respectively control each corresponding winding of the driving motor to output different torques so as to enable the driving motor to output a preset torque and enable a vehicle to run at a desired vehicle speed. According to the invention, a driving range of the vehicle can be prolonged; the service life of the power battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of motor vehicle drive, in particular to a motor vehicle drive system. Background technique [0002] At present, the development of new energy vehicles at home and abroad is changing with each passing day, among which the drive motor is the main power drive component of the motor vehicle. There are three main types of vehicle drive motors: AC motors, DC motors and reluctance motors. However, due to the problems of large torque ripple and high power consumption, DC motors have gradually withdrawn from the market of automotive drive motors. The torque ripple problem of the reluctance motor has not been well solved either. [0003] Nowadays, the vehicle drive motor mainly adopts the AC asynchronous motor and the AC permanent magnet synchronous motor in the AC motor. The three-phase stator windings of AC asynchronous motors and AC permanent magnet synchronous motors mostly adopt the form of single windings, a...

AI Technical Summary

Problems solved by technology

Especially in pure electric vehicles, the drive motor is the only power output component. The power battery used to supply power to the drive motor needs to supply high-power and high-current power to the motor through the bus bar. Due to the existence of the internal resistance of the power battery, high-power power supply is inevitable. As a result, the power battery loses most of its power due to internal heating, which greatly reduces the driving range of the vehicle and reduces the service life of the power battery

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