基于旋转坐标的无刷电机矢量变频角度观测法

VVVF Angle Observation Method for Brushless Motor Based on Rotating Coordinates

无感矢量控制中准确观测转子的位置尤为重要,而观察法一般需要预先测量电机的相电阻、相电感、反向电动势等参数运行,传统的观察法是基于定子坐标系的,无法区分凸极性电机的电感变化,导致位置观察不准确。该位置观察法是在传统的锁相环观察法的基础上进行改进,可准确识别凸极性电机的最大和最小值,有效提高位置观测的精度,并具有很高的实用性。

In the sensorless vector control,it is very important to observe the position of the rotor accurately,and the observation method usually needs to measure the phase resistance,phase inductance and back EMF of the motor in advance.The traditional observation method is based on the stator coordinate system,which can not distinguish the inductance change of the salient pole motor,which leads to the inaccurate position observation.The location observation method is based on the traditional phase-locked loop observation method,which can accurately identify the maximum and minimum value of the salient pole motor,and effectively improve the accuracy of location observation,and has high practicability.