Predictive Current Control of PMSM Based on Load Observer
To solve the problems of heavy burden of online optimization calculation and insufficient anti-load disturbance performance of traditional predictive current control system of permanent magnet synchronous motor(PMSM),a predictive current control strategy based on load torque observer is proposed.Firstly,virtual voltage vectors are constructed based on discrete space vector modulation,and the alternative voltage vector control set is optimized with the idea of deadbeat to reduce the computational of voltage vector selection.Then,in order to improve the anti-load disturbance capability of the system,a reduced-order observer is designed to observe the load torque in real time,and the load torque observation value is fed forward proportionally to the current loop to compensate the current fluctuation caused by the change of the load torque.The simulation results show that the proposed voltage vector selection strategy can effectively reduce the computational burden while ensuring the control effect,and the introduction of the reduced-order observer can significantly improve the anti-load disturbance capability of the system.
Permanent magnet synchronous motorpredictive current controldiscrete space vector modulationload disturbancereduced-order observer
万方数据
维普
