Motor torque correction method and device, motor and vehicle

Abstract

The present invention provides a motor torque correction method and device, a motor and a vehicle, and relates to the automobile technology field. It is realized that a permanent magnet synchronous motor still can ensure that the motor outputs torque satisfying demands after attenuation. The main technical scheme of the invention is a motor torque correction method. The method comprises: obtaining the real flux linkage data of a motor; performing correction of d-axis current and q-axis current of the motor according to the real flux linkage data to obtain a d-axis current correction value and a q-axis current correction value; and correcting the output torque of the motor according to the d-axis current correction value and the q-axis current correction value. The motor torque correction method is mainly used for correction of the output torque of the motor to allow the motor to output the torque satisfying demands.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a motor torque correction method, a motor torque correction device, a motor and a vehicle. Background technique [0002] With the pollution of the environment and the depletion of energy sources, electric vehicles that are more energy-efficient and environmentally friendly have gradually become an important development direction for the future automotive industry. [0003] Among them, permanent magnet synchronous motors are widely used in the field of electric vehicles. However, during the use of permanent magnet synchronous motors, affected by temperature, vibration, etc., the performance of the permanent magnets of the motor will be irreversibly attenuated, which will Affecting the torque output of the motor, the torque accuracy of the motor is not up to standard after the vehicle is used for a long time. After the decay of the permanent magnet, it can still continue to dr...

AI Technical Summary

Problems solved by technology

[0003] Among them, permanent magnet synchronous motors are widely used in the field of electric vehicles. However, during the use of permanent magnet synchronous motors, affected by temperature, vibration, etc., the performance of the permanent magnets of the motor will be irreversibly attenuated, which will Affecting the torque output of the motor, the torque accuracy of the motor is not up to standard after the vehicle is used for a long time. The permanent magnet can continue to drive normally after decay

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