An Automatic Generation Method of Current Idiq Table Based on Permanent Magnet Motor Parameter Table

Abstract

The invention provides an automatic current idiq table generation method based on a permanent magnet motor parameter table. The method comprises steps that firstly, modeling of a permanent magnet motor in the matlab software is performed, and the pole pair number, the rotor flux linkage, the stator resistance and an inductance map of the permanent magnet motor are set; secondly, the maximum limitof the phase voltage peak value of the permanent magnet motor is determined, and the maximum value limit of a voltage vector amplitude is further determined; thirdly, a speed array, a torque array, acurrent vector amplitude array and a current vector angle array are set; fourthly, three-layer loop is performed according to multiple speeds preset in the speed array, multiple current vector amplitudes preset in the current vector amplitude array and multiple current vector angles preset in the current vector angle array; and fifthly, according to a d-axis component and a q-axis component of thestator current corresponding to each pair of the rotation speed and the torque, the current idiq table based on the permanent magnet motor parameter table is generated. The method has advantages of simple and convenient collection, short period, relatively high accuracy and relatively strong practicality.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to an automatic generation method of a current idiq table based on a permanent magnet motor parameter table. Background technique [0002] Permanent magnet motors have high efficiency and high power density, and are the mainstream drive motors on electric vehicles. For the permanent magnet motor installed on the existing new energy vehicle or hybrid vehicle, when the motor controller performs torque control, different torques are generated by adjusting the current loop idiq command. The existing mainstream solution is to look up the table according to the actual speed value and torque command value to obtain the idiq command value of the current loop, so as to quickly and accurately control the actual torque of the permanent magnet motor. Therefore, the accuracy of the idiq meter directly affects the torque output capability of the permanent magnet motor, such as to...

AI Technical Summary

Problems solved by technology

Therefore, the accuracy of the idiq meter directly affects the torque output capability of the permanent magnet motor, such as torque accuracy, maximum torque output, and may even affect the normal operation of the motor controller, such as the duty cycle of the motor controller is saturated. In severe cases Can affect the stable operation of the system

The existing idiq table generation method is usually to do experimental measurement, and the torque output by the test motor is used as the judging standard. The cycle is long, the efficiency is low, the standard is not uniform, the accuracy is low, and the performance of the motor cannot be fully utilized.