CAJ | 학술논문

针对方波驱动的无刷直流电机普遍存在的换相转矩脉动较大的问题，提出了一种基于准 Z 源网络抑制永磁无刷直流电机换相转矩脉动的方法。在三相桥臂前级增加准 Z源网络，换相期间由准 Z 源网络调整直流母线电压，使电机关断相电流下降速率与开通相电流上升速率相等，从而有效抑制换相转矩脉动。分析了换相转矩脉动产生的原因，详细介绍了通过增加前级功率变换电路抑制换相转矩脉动的电路拓扑与控制算法。仿真及实验结果表明，该方法能够有效抑制永磁无刷直流电机换相转矩脉动，如采用合适的电路参数，仿真模型中转矩脉动可减少到平均转矩的4.6%以下，实际设计的系统实验可将转矩脉动抑制在平均转矩的12%以下。
침대방파구동적무쇄직류전궤보편존재적환상전구맥동교대적문제，제출료일충기우준 Z 원망락억제영자무쇄직류전궤환상전구맥동적방법。재삼상교비전급증가준 Z원망락，환상기간유준 Z 원망락조정직류모선전압，사전궤관단상전류하강속솔여개통상전류상승속솔상등，종이유효억제환상전구맥동。분석료환상전구맥동산생적원인，상세개소료통과증가전급공솔변환전로억제환상전구맥동적전로탁복여공제산법。방진급실험결과표명，해방법능구유효억제영자무쇄직류전궤환상전구맥동，여채용합괄적전로삼수，방진모형중전구맥동가감소도평균전구적4.6%이하，실제설계적계통실험가장전구맥동억제재평균전구적12%이하。
Focusing on popular existed high commutation torque ripple of square waves driving brushless DC motors, this paper presented a new method of suppressing commutation torque ripple for brushless DC motors based on a Quasi-Z-Source net. The Quasi-Z-Source net was employed at the front of the three-phase bridge. The control strategy was to adjust the DC link voltage of the motor controller via the Quasi-Z-Source net to keep the incoming and outgoing phase currents changing at the same rate during commutation, hence to effectively suppress commutation torque ripple. The cause of commutation ripple was analyzed. A novel circuit topology and a control algorithm of suppressing commutation torque ripple employed a Quasi-Z-Source net before the inverter was introduced in detail. Finally, simulation and experimental results show that, the proposed method can effectively minimizing commutation torque ripple. Torque ripple can be reduced to below 4.6% of the average torque by using appropriate circuit parameters in a simulation mode. And torque ripple can also be reduced to below 12% of the average torque via experimentation in real situation.