无轴承同步磁阻电机定子电流内模解耦控制方法

Internal Model Decoupling Control Method of Stator Current for Bearingless Synchronous Reluctance Motors

无轴承同步磁阻电机转矩控制采用矢量控制策略时,电机转矩绕组d-q轴电流和电压之间存有复杂的交叉耦合关系,动态过程中电流分量相互影响,对电机悬浮力控制造成严重干扰,使无轴承同步磁阻电机的悬浮运行和调速性能变差。为消除上述电流耦合关系,采用内模控制方法对电机转矩绕组电流进行解耦控制。设计了电流内模解耦控制器,进行了控制系统的仿真研究,仿真结果表明所提出的内模控制方法具有良好的解耦效果和控制特性。

When torque control for bearingless synchronous reluctance motors （BSRM） using vector control, there are cross couplings between currents and voltages of torque windings in synchronous d-q coordinates, the current components effect each other in dynamic process and also cause interference with suspension forces control, so performances of suspen- sion and speed regulation become bad. To cancel the coupling relationships, the method of internal model control was presented. The currents internal model controller was designed and the control system simulation was studied. Simulation results show that the internal model controller has good decoupling characteristics.