CAJ | 학술논문

本文研究了永磁同步电机（PMSM）直接转矩控制（DTC）系统，DTC系统普遍存在着在低速运行时，转矩脉动比较大的不足。本文具体分析了零电压矢量对转矩的作用，根据加入的零电压矢量作出了新的开关表，仿真结果表明：在保持了PMSM直接转矩控制系统优良的特性同时，使转矩脉动有显著减小。
본문연구료영자동보전궤（PMSM）직접전구공제（DTC）계통，DTC계통보편존재착재저속운행시，전구맥동비교대적불족。본문구체분석료령전압시량대전구적작용，근거가입적령전압시량작출료신적개관표，방진결과표명：재보지료PMSM직접전구공제계통우량적특성동시，사전구맥동유현저감소。
This paper studies the permanent magnet synchronous motor （PMSM） direct torque control （DTC） system, DTC has drawbacks that the ripples in torque are relatively higher at low speed. The thesis analyzes the reasons of DTC system for the existence of torque ripple, and uses the nonlinear perpendicular flux observer with compensation feedback, solves the problems associated with traditional flux observer, and studies the effect of zero-voltage vector to the torque, uses the switch table that add the zero-voltage vector. Through analyze the results of simulation, it can reduce the torque ripple.