正弦单极励磁开关磁阻电机电磁转矩分析

Analysis on Electromagnetic Torque of Switched Reluctance Motor with Unipolar Sinusoidal Excitation

通过对开关磁阻电机施加带有直流偏置的正弦单极电流,分析开关磁阻电机的电磁转矩。正弦单极励磁电流包含直流分量和交流分量,其分别产生转子磁链和定子旋转磁场,因此,开关磁阻电机可以使用与交流电机相同的矢量控制系统。结果表明,与传统励磁的开关磁阻电机相比,采用正弦单极励磁的开关磁阻电机的电磁转矩波动更小。

Through applying unipolar sinusoidal current with DC bias to switched reluctance motor（ SRM）,this paper analyzes electromagnetic torque of SRM. The unipolar sinusoidal excitation current contains DC component and AC component,and they generate rotor flux linkage and stator rotating magnetic field respectively. Therefore,SRM can use the same vector control system as AC motor. The result shows that electromagnetic torque ripple of SRM with unipolar sinusoidal excitation is smaller than that of SRM with traditional excitation.