The research of arrange transition course in vector control of PMSM

In the research of digital vector control system of permanent magnet synchronous machine (PMSM), double loop control system was chosen, in which a PID controller was adopted in the speed and the current loop. Some problems such as overshoot, long response time and the small range of speed regulating appear. To deal with these problems, this paper discussed the methods of arrange transition course which arranged a suitable transition course according to the speed step signal and the ability that the system can endure. By means of the theory demonstrating and numerical simulation, a practical discrete linear tracking-differentiator was proposed, which lead the output of system to the transition course. As a result, the range of the proportion gain was extended, the output of system rapidly tracked the step signal and the overshoot decreased. The experiment of PMSM proved the reality and practicability of the proposed method of this paper.