Anti-integral Saturation Sliding Mode Controller for Electric Vehicle PMSM Control System
The electric vehicle motor drive system mostly adopts the traditional PI control.Because of the internal saturation limit of the sys-tem,the integral saturation phenomenon occurs,and the system is prone to generate the problem of over-harmonic oscillation.Therefore,this paper proposes a parameter improved anti-saturation sliding mode control strategy.First of all,the new strategy uses a smooth non-singular terminal sliding mode controller based on power-exponential mixed reaching law to replace the traditional sliding mode control to reduce the steady-state error and speed up the response speed.Then,a parameter adaptation anti-saturation integrator is designed to calculate the error before and after amplitude limiting and compensate it into the speed loop,so as to reduce the influence of the saturation effect of the PMSM physically limited system on the system overshoot.In addition,Lyapunov theory is used to prove the parameter adaptation anti-saturation slid-ing mode controller to ensure the stability of the system.The simulation and experimental results show that this strategy can effectively improve the overshoot of the system and weaken the chattering problem of the sliding mode control in the motor speed control.
electric vehiclepermanent magnet synchronous motornonsingular terminal sliding mode controlanti-saturation integratorLyapunovDSP
万方数据
维普
