CAJ | 학술논문

提出并分析研究了一种凸极式永磁无刷直流电机定子磁链幅值不控型直接转矩控制策略。结合凸极式永磁无刷直流电机及其两相导通工作特点,全面建立起两相导通时电压矢量对电磁转矩控制理论。采用转矩单环控制,根据转矩滞环比较输出和定子磁链位置给出所施加的电压矢量,实现转矩的快速控制。推导出两相静止坐标系下电磁转矩计算模型,并针对实际无刷电机转子反电势既非理想梯形波,又非正弦波的情况,提出采用查表方式获得转矩观测所必需的转子反电势和转子磁链方法。实验结果表明,所提控制方案具有快速的动态响应和良好的稳态性能。
제출병분석연구료일충철겁식영자무쇄직류전궤정자자련폭치불공형직접전구공제책략。결합철겁식영자무쇄직류전궤급기량상도통공작특점,전면건립기량상도통시전압시량대전자전구공제이론。채용전구단배공제,근거전구체배비교수출화정자자련위치급출소시가적전압시량,실현전구적쾌속공제。추도출량상정지좌표계하전자전구계산모형,병침대실제무쇄전궤전자반전세기비이상제형파,우비정현파적정황,제출채용사표방식획득전구관측소필수적전자반전세화전자자련방법。실험결과표명,소제공제방안구유쾌속적동태향응화량호적은태성능。
A novel direct torque control strategy of salient permanent magnetic brushless DC motor (BLDCM) without control for stator flux linkage amplitude was proposed combining with the characteristics of salient BLDCM and its operating mode with two phase conduction. This novel DTC adopts a single hysteresis-controlled torque loop to realize the rapid torque control by voltage vectors according to torque hysteresis comparison output and the position of stator flux linkage. The control theory of electromagnetic torque was set up using voltage vector in two phase conduction mode and the electromagnetic torque calculation mode was deduced in two phase static reference frame. A method of table lookup gaining the rotor back electromotive force (EMF) and flux linkage was applied to calculate torque as the BLDCM rotor back EMF is neither sinusoid nor trapezoid. Experimental results show that the proposed salient BLDCM DTC drive system has a quick dynamic response and good steady performance.