CAJ | 학술논문

为了实现电励磁同步电机无位置传感器控制，提出基于高频注入电流的同步电机转子位置检测方法。通过注入高频励磁电流，采集耦合在定子上具有转子位置信息的高频电压信号，经过滤波及坐标变换提取有效信息，采用锁相环(phase-locked loop，PLL)算法最终锁定转子位置。针对晶闸管系统换相时刻因定子端电压畸变严重难以有效提取高频信号的问题，提出基于电压预估的转子位置检测方法。在换相时采用预估电压作为锁相环的给定，克服定子电压畸变对锁相环路工作的干扰，提高转子位置检测的精度，并增加锁相环工作的稳定性。仿真和实验结果验证了算法的有效性。
위료실현전려자동보전궤무위치전감기공제，제출기우고빈주입전류적동보전궤전자위치검측방법。통과주입고빈려자전류，채집우합재정자상구유전자위치신식적고빈전압신호，경과려파급좌표변환제취유효신식，채용쇄상배(phase-locked loop，PLL)산법최종쇄정전자위치。침대정갑관계통환상시각인정자단전압기변엄중난이유효제취고빈신호적문제，제출기우전압예고적전자위치검측방법。재환상시채용예고전압작위쇄상배적급정，극복정자전압기변대쇄상배로공작적간우，제고전자위치검측적정도，병증가쇄상배공작적은정성。방진화실험결과험증료산법적유효성。
To control the electrical excitation synchronous motor without position sensors, a high-frequency current injection based detection method is proposed for positioning the synchronous motor rotor. By injecting a high-frequency excitation current, high-frequency voltage signals carrying rotor position information on the stator are collected. Effective information is obtained after filtering and coordinate transformation, and thereby the rotor position is located using the PLL algorithm. Due to the serious distortion of the stator voltage at the time of thyristor commutation, to extract the high frequency signal is difficult. Aiming at this problem, the rotor position detection method based on voltage prediction is proposed. In this method, using the prediction voltage as the input value for PLL, the interference to the PLL that results from the serious distortion of the stator voltage is overcome. Meanwhile, the precision of rotor position detection as well as the stability of PLL is improved. Experimental and the simulation results confirm the effectiveness of the proposed algorithm.