六相永磁直线同步电机电磁特性分析及数学模型建立

为深入研究新型永磁直线同步电机(PMLSM)的性能，实现电机结构设计与控制优化，对其电磁特性及数学模型的建立展开了研究。针对暂态时间、饱和特性及不对称性等电磁特性进行分析，然后建立了abc坐标系和dq0坐标系下电机数学模型，由此阐述电机电磁耦合关系，继而建立了等效电路，并对瞬态工作特性进行计算。最后，通过电压测试值和瞬态推力有限元值与解析计算值进行对比，其结果吻合度较高，验证了数学模型的正确性。

Electromagnetic Characteristics and Mathematical Model of Six-Phase Permanent Magnet Linear Synchronous Motor

In order to analyze the performance of the novel permanent magnet linear synchronous motor (PMLSM) and achieve the design of motor structure and the optimization of control, the mathematical model and electromagnetic characteristics are built and studied. The electromagnetic characteristics such as transient time, saturation characteristic and asymmetry are analyzed. Then the mathematical equations of the motor in the abc and dq0 coordinate systems are established to illustrate the electromagnetic coupling relationship. Besides, the equivalent circuit are established and the transient operating characteristics are calculated. Finally, the results of the voltage experimentation and the transient thrust finite element values are compared with that of the analytical calculation. The results are in good agreement and verify the correctness of the mathematical model.