一种应用于全数字伺服系统中电机转子初始定位的方法

A Method for Measuring Initial Position of Motor Rotor of a Digital Servo System

在使用增量式光电编码器测量电机位置的伺服系统中,在电机启动时,普遍存在无法准确测量出电机转轴初始位置的问题。电机的初始位置不仅影响伺服系统的定位精度,而且会对电机的启动性能造成一定的影响。本文提出了一种电机初始位置的确定方法,通过输出给定位置的定子电流矢量的方法可以精确的检测出电机初始位置。实验结果表明,使用该方法进行初始定位时,电机仅有微小的振动,并且电机在定位前后启动性能有较大的提高。

A problem that is about unable correctly measurement of initial position of motor rotor exists in a servo system applying increment photo-electricity pulse coder when the motor starts. The initial position of motor rotor not only affects positioning precision, also has effect on start-performance of motor. This paper proposes a method for measurement of initial position of motor rotor, and the initial position can be measured accurately through controlling a given-position current vector of motor stator. Experimental results verify that the start-performance of motor can be improved and the motor only has some tiny vibrancy in the course of measurement.