CAJ | 학술논문

针对永磁同步电机在运行过程中电流波形发生畸变、谐波含量高等问题，结合同步旋转坐标变换理论提出一种谐波抑制方法。建立永磁同步电机的数学模型，分析时间谐波和空间谐波的产生原因及对电机正常运行造成的不利影响。采用坐标变化与低通滤波器检测5次与7次谐波，在原有的双闭环系统基础上增加谐波电流环，通过PI控制抑制谐波电流。最后以4 kW表贴式磁悬浮永磁同步电动机为对象进行仿真分析和实验验证，仿真和实验的结果表明，采用坐标变换的谐波抑制算法可以有效抑制谐波电流，提高电机相电流的正弦度，对不同原因造成的谐波均有抑制作用，并且具有计算简单、容易实现的特点。
침대영자동보전궤재운행과정중전류파형발생기변、해파함량고등문제，결합동보선전좌표변환이론제출일충해파억제방법。건립영자동보전궤적수학모형，분석시간해파화공간해파적산생원인급대전궤정상운행조성적불리영향。채용좌표변화여저통려파기검측5차여7차해파，재원유적쌍폐배계통기출상증가해파전류배，통과PI공제억제해파전류。최후이4 kW표첩식자현부영자동보전동궤위대상진행방진분석화실험험증，방진화실험적결과표명，채용좌표변환적해파억제산법가이유효억제해파전류，제고전궤상전류적정현도，대불동원인조성적해파균유억제작용，병차구유계산간단、용역실현적특점。
The current of permanent magnet synchronous motor ( PMSM) contains a lot of harmonic cur-rents, resulting in the motor current waveform distortion. In order to solve this problem, a novel suppres-sion method based on synchronous rotating coordinate transformation was proposed. Based on the estab-lished model of PMSM, the adverse impact caused by harmonics was analyzed. Through rotating coordi-nate transformation and low-pass filter, the fifth and seventh harmonic currents were extracted and con-trolled by PI regulator. Simulations and experiments with a 4-kW magnetic suspension PMSM were car-ried out. The results verify that the method based on coordinate transformation can suppress the harmonic currents caused by different reasons. The proposed method has the advantage of easy mathematical com-putation and simple implementation.