Battery electric vehicle drive motor rack automatic calibration method and device

Abstract

The present invention discloses a battery electric vehicle drive motor rack automatic calibration method. The method comprises the steps of: connecting a motor, an upper computer, a dynamometer, a motor controller and a motor cooling system, correcting an address according to a communication protocol of the motor and the motor controller, confirming the model of the motor and correcting related technical parameters; performing automatic identification, learning angles of a rotor and a rotary transformer, determining how large the rotation speed is to cause that the motor enters a weak magneticregion, and at the same time, performing fine tuning of the angle to allow the torque of the motor to be not changed much prior to and after entering the weak magnetic region; and determining a basespeed threshold value n0 of the motor entering the weak magnetic region, learning a feedforward angle value, performing an automatic calibration process, and finally performing calibration and verification.

Description

Technical field: [0001] The invention relates to an automatic calibration method and device for a driving motor bench of a pure electric vehicle, belonging to the testing field of pure electric vehicles. Background technique: [0002] In the field of pure electric vehicle testing, the drive motor needs to use the motor controller for bench calibration. At present, the bench calibration of pure electric vehicle drive motors is realized by manual calibration, that is, under different working conditions (different motor speed n and Under different motor demand torques T), manually change the values ​​of Id (D-axis current) and Iq (Q-axis current) to match the optimal demand torque, so as to obtain the demanded Id and Iq tables. However, this manual calibration method will produce reading errors, and will also cause a large range of motor temperature changes, which will affect the size of the flux linkage. The change of the flux linkage will directly lead to changes in the outpu...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems. By providing an automatic calibration method and device for a pure electric vehicle drive motor bench, it solves the problems of high work intensity, long calibration period, high technical requirements and poor calibration accuracy when manually calibrating the motor. , which improves the calibration efficiency of the bench

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