混合励磁同步电机控制策略比较研究

Comparative Research of Control Strategies for a Hybrid Excitation Synchronous Motor

混合励磁同步电机是一种在永磁电机基础上发展起来的新型电机,具有低速大转矩及宽调速特点.根据混合励磁同步电机的结构特点和电磁特性,设计了一种新型的矢量控制系统.该控制系统在基于转子磁场定向的基础上,分别提出了id≠0与id=0的最小铜耗控制及简易控制等三种不同的电流控制策略.理论分析和计算机仿真结果表明,应用所提出的三种电流控制策略,都能使混合励磁同步电机具有良好的静动态性能,但采用不同的控制方法效率不同,这三种控制方法的仿真结果对比表明,采用id≠0的最小铜耗控制方法效率最高,而应用简易控制方法,算法虽然简单,但是效率也最低.

Hybrid excitation synchronous motor （HESM） is a novel motor developed on permanent magnetic motor, it has a significant feature of low speed high torque and wide speed-range operation. This paper proposes a novel control system for HESM according to its structure and electromagnetic characteristics. Three new control algorithms have been proposed which are minimum copper loss control with id ≠0 or id=0 and simple control,they are all based on SVPWM technique. Theoretical analysis and computer simulation results show that low speed high torque and excellent dynamic performance can be obtained with each of these control algorithms, but the highest efficiency will be achieved by adopting the minimum copper loss control with id ≠0, and the simple control algorithm leads to the lowest efficiency.