全数字伺服系统中相序故障自恢复功能的实现

针对永磁同步电机的伺服控制系统,分析了由电机相序的错接造成的启动故障,并对故障情况进行了归类。文中介绍了一种使用F240DSP控制芯片实现电机转子定向控制的方法。在光电编码盘角度反馈信号的帮助下,采用定子电压定向控制技术可准确地判断电机的三相连接方式,并通过软件调整驱动器的输出相序,以实现故障的自恢复功能。实验表明,电机在发生相序故障时,可快速地自恢复并完成启动,它可用于伺服控制系统。

Realization of Self-recovering Function During Phase-sequence Fault in a Digital Servo System

As for a servo control system of the permanent magnet synchronous motor,this paper analyzes faults of motor start which are on account of mistaken connection of motor phase-sequence,as well as kinds of faults have been classified in the paper.In addition,a method which can realize motor rotor oriented control using F240 is proposed.With the help of angle signals by a photo-electricity encoder,the connected sequence of motor phase can be judged by using stator voltage vector oriented control technology,also it can realize self-recovering function by adjusting output phase-sequence of the driver by programming.Experiment results verify that the motor can self-recover fast when phase-sequence faults happened and can start rapidly,and the proposed method can be used in servo control system.