正弦PWM电压源逆变器供电的永磁直线同步电机低速负载性能(英文)

Load Performance of PMLSM in Lower Speed Region Fed by Sinusoidal PWM Inverter

对于开环低速区由正弦PWM电压源逆变器供电的永磁直线同步电机(PMLSM)而言,与工作在高速情况的PMLSM负载性能不同,本文采用场路耦合时步有限元的方法研究PMLSM驱动水平运输系统的两种负载工况:轻载与重载。结果显示PMLSM工作在重载工况下的负载性能较轻载优,且电机的工作电流随着负载的增大而减小。仿真与实验结果验证了该方法的有效性及正确性。

For the permanent magnet linear synchronous motor （PMLSM） fed by sinusoidal PWM voltage source inverter in the lower speed condition without feedback control, load performance is different from the PMLSM working in high speed region. The paper adopts time-step finite element method and field circuit coupling method to investigate load performance of the PMLSM to drive horizontal transportation system with light load and heavy load condition respectively. It is shown that load performance of the PMLSM in the heavy load condition is highly better than those in light load operation conditions, and operation current becomes lower with load increasing. The validity is verified by comparisons of simulation and experimental results.