Motor control method and motor control system of vehicle

Abstract

The invention discloses a motor control method and a motor control system of a vehicle and belongs to the motor control field. The motor control system comprises a driving state judge unit and a space vector control unit, wherein, the driving state judge unit is used for judging the starting state, the low-speed and large-load running state or the normal driving state of the vehicle in real time; and based on the judgment results of the driving state judge unit, the space vector control unit controls the motor to output equivalent square wave phase current when the vehicle is in the starting state or the low-speed and large-load running state, and the space vector control unit controls the motor to output sinusoidal wave phase current when the vehicle is in the normal driving state, so as to achieve the purposes of large starting torque and low running noise of the vehicle, avoid the mechanical vibration of the motor which is driven by the square wave for a long time and prolong the service life of the motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a motor control method and system of a vehicle. Background technique [0002] As the earth's oil resource crisis and environmental pollution become more and more serious, the development of new energy vehicles has become the focus of global attention. Fuel mopeds have reduced oil consumption and waste emissions to a certain extent, but fuel mopeds are ultimately It still consumes oil resources, and its work efficiency is low, and its operation noise is loud, which also brings many problems to the environment, especially in places with high population density. In order to solve a series of problems existing in fuel mopeds, it is necessary to develop electric vehicles to replace fuel mopeds, such as electric motorcycles. However, to achieve the driving effect of fuel mopeds, electric motorcycles must have fast start, With the characteristics of high driving speed and certain battery l...

AI Technical Summary

Problems solved by technology

At present, there are two most common motor control methods for motor control systems, one is the square wave control method using 120-degree control technology, and the other is the sine wave control method using 180-degree control technology; the characteristics of the square wave control method The starting torque is large, but the running noise is also large, especially the noise problem is more serious under heavy load conditions; the sine wave control method is characterized by high operating efficiency and low driving noise, but the starting torque is small, and the vehicle starts slowly

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