Multiple-motor driving system for electric automobile and control method of multiple-motor driving system

Abstract

The invention relates to a multiple-motor driving system for an electric automobile and a control method of the multiple-motor driving system. The multiple-motor driving system comprises only one control unit, a communication unit, at least two driving units, motors and a signal transducer which is used for collecting the running state of the motors, wherein the control unit is connected with the driving units through the communication unit; the driving units and the motors are in one-to-one correspondence and connection; an output terminal of the signal transducer is connected with the control unit. The control method comprises the following steps that the control unit receives operating instructions from a driver of the electric automobile and then sends out a control signal which is transmitted to the driving units through the communication unit, the driving units drive the motors to operate, and the signal transducer collects the running state of the motors in real-time and transmits information back to the control unit, so that the real-time monitoring of the motors is realized. According to the multiple-motor driving system and the control method thereof disclosed by the invention, one control unit can control a plurality of motors, so that the controlled run of the motors in serial shaft type connection and the controlled run of a plurality of separate wheel driving motors in the electric automobile are convenient to realize, the volume is reduced, the arrangement is flexible, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of electric vehicle manufacturing, in particular to an electric vehicle multi-motor drive system and a control method thereof. Background technique [0002] With the ever-changing types and forms of electric vehicles, the requirements for driving motors and their control systems are also getting higher and higher. New types of electric vehicles, such as modular combined motor drive and multi-wheel independent drive, have attracted widespread attention in the industry due to their ideal power combination, cost advantage, and good application background such as handling performance. [0003] In the prior art, electric vehicles generally use a single motor drive system for front-wheel drive or rear-wheel drive, and one controller matches one drive motor, that is, one controller controls one drive motor. If a vehicle is driven by multiple motors, a corresponding number of controllers needs to be configured, resulting in ...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the problem that the controllers and motors are configured in a one-to-one correspondence in the current electric vehicles, and multiple motors must be equipped with a corresponding number of controllers, resulting in a large volume of the entire drive system, which is not conducive to the flexible layout of the entire vehicle and the technology of cost control Problem: To provide a multi-motor drive system and its control method for electric vehicles, which can control multiple motors with only one control unit, effectively reducing the size of the entire drive system, facilitating flexible layout of the vehicle, and reducing costs

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