CAJ | 학술논문

针对负载转矩扰动对永磁同步电机控制性能的影响,将负载转矩和转速作为状态变量,选取转速实际值与观测值的偏差作为滑模切换面,设计负载转矩滑模观测器用于实现负载转矩的在线辨识.该观测器结构简单,适用于不同电流控制策略下永磁同步电机的负载转矩的在线估计.然后将实时辨识的负载转矩引入到电流环控制中形成对参考转矩的前馈补偿,抑制负载时变对控制性能的影响.理论分析及实验表明,该观测器能够准确观测负载转矩,采用的前馈补偿策略能够有效地抑制负载转矩突变对转速的影响,改善了控制系统的动态响应性能.
침대부재전구우동대영자동보전궤공제성능적영향,장부재전구화전속작위상태변량,선취전속실제치여관측치적편차작위활모절환면,설계부재전구활모관측기용우실현부재전구적재선변식.해관측기결구간단,괄용우불동전류공제책략하영자동보전궤적부재전구적재선고계.연후장실시변식적부재전구인입도전류배공제중형성대삼고전구적전궤보상,억제부재시변대공제성능적영향.이론분석급실험표명,해관측기능구준학관측부재전구,채용적전궤보상책략능구유효지억제부재전구돌변대전속적영향,개선료공제계통적동태향응성능.
The load torque disturbance will affect the control of permanent magnet synchronous motor (PMSM). To solve this problem, this paper proposes a load torque sliding mode observer. The state variables are speed and load torque;errors between the real and the observed speed are selected as a sliding mode hyper plane. The observer has a simple structure and can identify load torque of permanent magnet synchronous motor under different current control strategies. Through the introduction of load torque feed-forward compensation, the influence on the performance of control system caused by load torque disturbance can be inhibited. Theoretical analysis and experimental results show that the sliding mode torque observer can estimate the load torque precisely, and the feed-forward compensation can improve the dynamic response efficiently.