内置式永磁同步电机驱动系统效率优化研究

摘要

To solve the power loss and improve the dynamic performance of IPMSM for railway vehicle, the power loss model of IPMSM - DTC was established based on the equivalent circuit. The relationship among power loss, excitation current and speed was analyzed. A novel method was proposed to derive the optimal excitation current under different conditions. The optimum operating efficiency of IPMSM was achieved by auto-matically adjusting the given flux value online real-time and adopting fuzzy controller of the torque error and flux error at different operating conditions. The dynamic and static performances of the system were improved.The simulink model was founded by Matlab and the 100 kW IPMSM efficiency optimization fuzzy logic control experiment platform system was implemented using a TMS320LF2407A DSP. The validity of the proposed strategy was proved by the simulation and experimental results.%针对城轨牵引的内置式永磁同步电机的运行损耗问题和动态性能改善问题,从IPMSM-DTC等效电路出发,建立了IPMSM-DTC的损耗模型,分析了各种损耗与励磁电流和转速的关系,提出了一种新颖方法推导出不同条件下的最优励磁电流,进而实时在线自动调整磁链给定值,并对转矩误差、磁链误差采用模糊控制,以使电机在不同的运行工况下达到电机运行效率最佳,能改善其动态性能,实现其高性能.采用Matlab仿真软件建立了系统模型,针对100 kW的轨道车辆用永磁同步电动机开发了基于TMS320LF2407ADSP的效率优化模糊控制系统实验平台.仿真和实验结果证明了本策略的有效性.