混合励磁同步电机铜耗最小化弱磁调速控制研究

Copper Loss Minimization Flux Weakening Control for Hybrid Excitation Synchronous Motor

混合励磁同步电机(hybrid excitation synchronous motor,HESM)具有调磁方便、调速范围宽等优势,在工业、军事领域应用前景广阔。该文在矢量控制和速度分区控制的基础上,针对HESM提出了一种铜耗最小化弱磁调速控制方法。该方法以电机铜耗最小化为目标,自适应地调节弱磁基速系数,在满足电枢端电压限制的条件下,对q轴电流、d轴电流与励磁电流进行最优配置。在深入分析弱磁基速系数对电机运行性能的影响的基础上,应用自适应控制方法对其进行调节以提高电机的调速范围、效率及动态特性等综合性能。最后,通过仿真和电机驱动实验验证了所提出的控制方法的正确性和有效性。结果表明,所提出的HESM弱磁控制方法,可实现电机综合性能的最优化控制。

Hybrid excitation synchronous motor（HESM）, with the superiority of field adjustable and wide speed operation range, has broad application prospects in industrial and military. This paper proposes a novel copper loss minimization flux weakening control method for HESM based on vector control and speed region control. The proposed method adaptively adjusts the coefficient of flux-weakening base speed using minimum copper loss as optimization target, so that q axis, d axis currents and exciting current are optimally allocated under the condition of armature terminal voltage limited. On the basis of analyzing the influences of the coefficient of flux-weakening base speed on the operation performance, an adaptive control method is adopted to adjust it for improving the comprehensive performance of HESM, including speed operation range, efficiency and dynamic behavior. The correctness and effectiveness of the proposed method are verified by simulation and experimental results, which shows that the comprehensive operational performance of HESM can be optimized by the proposed flux weakening control method.