破冰冲击负载下吊舱推进变频器转矩控制技术研究OA

The frequency converter needs to respond quickly and drives the permanent magnet synchronous motor(PMSM)when an icebreaking vessel operates under icebreaking condition.To solve the problem,this paper proposes a fast torque control strategy for PMSM under icebreaking impact load.Firstly,mathematical expressions for torque,flux and voltage of PMSM are derived.Secondly,based on the deadbeat control principle,a deadbeat torque and flux controller of PMSM is designed to improve the dynamic response performance of torque and flux.Furthermore,an analysis is conducted on the principle of torque-flux control by using graphical method.Finally,simulation result confirms the effectiveness of the proposed strategy.