CAJ | 학술논문

在对无刷直流电机（BLDCM）非导通相二极管续流进行分析的基础上,利用能量单元法对非换相期间（导通区）电磁转矩脉动进行量化分析,推导出了PWM调制方式下导通区转矩脉动计算的公式。结合混合动力电力驱动的电路结构,采用了在三相逆变桥入端加上双向直流变换器的驱动拓扑结构与相应的控制策略,消除了BLDCM在导通区内非导通相的续流现象,从而抑制了导通区内的电磁转矩脉动。实验结果验证了该方法的有效性,提高了BLDCM在混合动力车中的应用精度。
재대무쇄직류전궤（BLDCM）비도통상이겁관속류진행분석적기출상,이용능량단원법대비환상기간（도통구）전자전구맥동진행양화분석,추도출료PWM조제방식하도통구전구맥동계산적공식。결합혼합동력전력구동적전로결구,채용료재삼상역변교입단가상쌍향직류변환기적구동탁복결구여상응적공제책략,소제료BLDCM재도통구내비도통상적속류현상,종이억제료도통구내적전자전구맥동。실험결과험증료해방법적유효성,제고료BLDCM재혼합동력차중적응용정도。
The torque ripple of brushless DC motor（BLDCM） in conduction region is analysed precisely using energy unit method based on the research of diode freewheeling of the inactive phase.A formula is derived to calculate the torque ripple in conduction region under conventional PWM schemes.Combined with the circuit configurations of hybrid system,this paper proposes a new topology by adding a Bi-directional DC/DC Converter at the front of the inverter.The torque ripple in conduction region is suppressed by eliminating the diode freewheeling phenomenon.Experimental results indicate the effectiveness of the new topology.BLDCM can be used more precisely in hybrid system.