CAJ | 학술논문

针对永磁同步电机在弱磁过调制工况下产生的电流谐波大、转矩波动大等问题，提出了改进无差拍电流谐波抑制策略。本文对比分析了在模型参数不匹配的情况下改进前后无差拍控制系统的稳态误差，并且分析了改进无差拍控制算法在弱磁过调制区域对电流谐波的抑制作用，同时证明了改进无差拍控制系统的稳定性。实验结果证明了该策略的有效性。
침대영자동보전궤재약자과조제공황하산생적전류해파대、전구파동대등문제，제출료개진무차박전류해파억제책략。본문대비분석료재모형삼수불필배적정황하개진전후무차박공제계통적은태오차，병차분석료개진무차박공제산법재약자과조제구역대전류해파적억제작용，동시증명료개진무차박공제계통적은정성。실험결과증명료해책략적유효성。
This paper presents an improved DCC ( deadbeat current control) method for PMSM ( permanent magnet synchronous motors) in over?modulation range. The proposed method can effectively reduce current harmonics and the torque ripple in the flux?weakening over?modulation region. A low pass filter is added in the feedback loop of the deadbeat current controller, and its output can be seen as the compensation of current error. The steady?state errors of the traditional and the improved deadbeat control system with the model parameters inaccuracies are ana?lyzed respectively in this paper. The improved deadbeat current control system can track the reference current with?out static error. The mechanism of the current harmonics rejection of the improved deadbeat control algorithm is studied in over?modulation region. At last, the stability of the improved deadbeat control system is proved. The ex?periments with a 5?2kW prototype of permanent magnet synchronous motor are carried out. The results show that the proposed strategy can effectively suppress current harmonics and torque ripple.