高速IPMSM离散滑模电流补偿解耦控制

Discrete Sliding Mode Current Compensation Decoupling Control for High Speed IPMSM

内嵌式永磁同步电机(IPMSM)矢量控制系统中,由于坐标变换引入与速度有关的交叉耦合项和系统控制延迟的影响,使得高速IPMSM在数字控制中电流环解耦性能下降。针对传统离散复矢量电流控制器只适用于表贴式永磁电机,不适用于IPMSM;同时对电机参数变化敏感,不能满足系统鲁棒性的问题,根据IPMSM d,q轴电感不相等的特点,建立了相应的离散数学模型,并根据零极点对消原理提出了离散电流控制器。同时,为提高系统的鲁棒性和参数不变性,设计了带离散滑模电流补偿解耦控制器。通过仿真和实验加以证明,结果表明该控制策略能有效实现d,q轴电流解耦,同时提高了系统动态性能。

In the interior permanent magnet synchronous motor（IPMSM） vector control system,the current loop decoupling performance of the high speed IPMSM is improved due to the influence of the coordinate transformation on the speed-dependent cross-coupling term and the system control delay. For the traditional discrete complex vector current controller is only applicable to the surface of the permanent magnet motor, not suitable for IPMSM, while the parameter changes sensitive to the system can’t meet the robustness of the problem. According to the characteristics of the built in IPMSM which d,q axis inductances are not equal,the corresponding discrete mathematical model is established and the discrete current controller is proposed according to the zero-pole canceling method.At the same time,in order to improve the robustness and invariance of the system, a discrete sliding mode compensation decoupling controller is designed.The simulation results show that the control strategy can effectively decouple the d,q current and improve dynamic performance of the system.