基于电压补偿的伪微分反馈PMSM电流预测控制

Predictive Current Control for PMSM Using Pseudo Differential Feedback Control Based on Voltage Compensation

永磁同步电机(PMSM)转速或转矩驱动系统要求具有良好的电流控制性能,因此电流环对电机系统的调节至关重要。为了提高电流环动态性能和鲁棒性提出了一种基于电压补偿的伪微分反馈永磁同步电机预测电流控制方法。在内置式永磁同步电机电流预测控制算法的基础上,利用伪微分反馈模块代替传统 PI调节器,提高系统的启动性能,降低超调,同时加入了一种融合电流预测策略的谐波抑制算法,进行前馈补偿。该算法可以有效的提高电流的跟踪速度,提升系统的鲁棒性。通过仿真结果验证了所提策略的正确性和有效性。

The favourable current control was required in speed or torque drive system of permanent magnet synchronous motor,so it’s very important for the control of the current loop.In order to improve the transient performance and the robustness.This paper proposed a pseudo differential feedback strategy for a three-phase permanent magnet synchronous motor model based on voltage compensation with predictive current control. Based on the current predictive control algorithm for a interior permanent magnet synchronous motor,This paper designed pseudo differential feedback strategy module to replace the PI regulator, improve the starting performance of the system and suppress the overshoot. at the same time, this paper embed predictive current control strategy into harmonic current suppressions algorithm and used it for feed-forward compensation.This algorithm suppressed the external disturbance effectively and improved the robustness of the system and current control method have good current tracking. Simulation results validate the feasibility and effectiveness of the proposed scheme.