Research on Vector Control of Permanent Magnet Synchronous Motor Based on Sliding Mode Controller
The vector control performance of traditional permanent magnet synchronous motor is easy to be affected by the change of motor parameters,which results in the poor overshoot of speed change.This paper presents a method of applying sliding mode controller to vector control,which can effectively solve the problem of large velocity overshoot.Firstly,a mathe-matical model of permanent magnet synchronous motor is established.Based on vector con-trol,a sliding mode controller which uses exponential reaching law to eliminate buffeting is derived by combining the change of motor speed and current.Then,SVPWM is used to re-place the traditional switch table for inverter control,and MATLAB is used to build a perma-nent magnet synchronous motor model combining sliding mode controller with vector control.Finally,the superiority of sliding mode controller is determined by comparing the improved system with the traditional vector control system.The results show that the anti-interference ability of PMSM combined with the vector control method is effectively controlled,and the o-vershoot problem is effectively improved,which proves the effectiveness of the vector control of PMSM by the sliding mode controller.
NETL
NSTL
万方数据
