Study On PMSM Servo System Algorithms And System Design

Permanent magnet synchronous motor (PMSM) has become the developing direction of servo drive in servo drive field. In order to obtain permanent magnet synchronous servo system with high performance and wide speed range, and to make the system posses better flexibility and strengthen anti-jamming, new control strategies and control measures should be studied and applied in the system. This paper is aiming at high performance, wide speed range permanent magnet synchronous servo system.The control strategies of the vector control technique is analyzed and reached in this paper. The analyses show that the parameters in d and q axe are decoupling, the torque control characteristic is linear, output torque steady, the speed range wide when the vector control technique is applied in motion control system. To meet the demand of servo drive system, the vector control technique is chosen as the control strategy of permanent magnet synchronous servo system.Based on automation theory and PID control theory, the configuration and mathematical model of all parts of permanent magnet synchronous servo system are analyzed carefully. The three loops of the system are designed with the help of engineering design method of automation system regulator. The simulation of the system is taken; parameters of system regulator are analyzed in detail, joined with the influence of load and parameters disturbance on all the pats of the system.Sliding mode control strategy (SMC) is introduced, and several problems of SMC were also analyzed carefully. The position loop and speed loop of servo system are redesigned, with the SMC and PID control strategy. In this case, we can improve the robustness of system. According to the experiment results, this new strategy can make the systems robust to the influence of load and parameters disturbance.This paper programmed based on the experimental apparatus and control algorithm, studied on the special functions including linear acceleration and deceleration, S-shape acceleration and deceleration, DC braking, parameter detecting, diagnosis and response of mal-function, finally the paper carried out solutions.