基于能量管理的PMSM回馈制动策略研究

Research of PMSM Regenerative Braking Strategy Based on Energy Manager Model

基于back-to-back变流器的电路拓扑结构,提出了一种用于永磁同步电动机回馈制动的控制策略。应用此策略,在去除变频器的直流母线制动电阻的条件下,永磁同步电动机可稳定运行于4象限,并且在各个象限间可实现连续、柔性的调速。基于模型参考自适应(MRAS)算法,设计了负载转动惯量的在线观测器,并基于此提出了4象限变频调速系统的能量管理策略。在4 k W永磁同步电动机实验平台上,实施了电动机的回馈制动策略,实现了调速系统的4象限运行。实验结果充分表明,该策略可以有效运用于永磁同步电机的可逆控制,从而为系统的后续工业应用奠定了基础。

Based on the topology of back-to-back convertor, a regenerative braking strategy Used for permanent magnet synchronous motor （PMSM） drives system was presented. According to this strategy, without DC-bus braking resistor, PMSM can operate in four-quadrants stably, and switch in different quadrants continuously. Based on MRAS theory, a moment inertia online-observer was designed, and an energy manager strategy was obtained by utilizing the result of inertia observer. Then on a 4 kW PMSM drives experiment platform, the regenerative braking strategy was implemented. The results of experiment have shown that the regenerative braking strategy can be used in PMSM forward and reverse operation effectively, which is the foundation of industrial application.