CAJ | 학술논문

以一台空间矢量脉宽调制(SVPWM)供电的5.5 kW异步电机为例，利用时步有限元法分析不同载波频率和调制比下电机定转子铁心磁密变化规律及其对损耗密度分布的影响。结果表明，变频供电时，定转子铁心磁密谐波主要集中在定子齿顶区域，随载波频率增加，电机总铁耗下降，但总体变化较小；调制比增加导致变频器输出电压谐波含量降低，电机内部定子铁心谐波损耗密度减小，电机总损耗随调制比增加而降低。对不同载波频率和调制比空载运行状态进行试验对比，验证了分析的正确性。
이일태공간시량맥관조제(SVPWM)공전적5.5 kW이보전궤위례，이용시보유한원법분석불동재파빈솔화조제비하전궤정전자철심자밀변화규률급기대손모밀도분포적영향。결과표명，변빈공전시，정전자철심자밀해파주요집중재정자치정구역，수재파빈솔증가，전궤총철모하강，단총체변화교소；조제비증가도치변빈기수출전압해파함량강저，전궤내부정자철심해파손모밀도감소，전궤총손모수조제비증가이강저。대불동재파빈솔화조제비공재운행상태진행시험대비，험증료분석적정학성。
Taking a 5. 5 kW motor fed by SVPWM as an example, time-stepping finite element method was utilized to study the changing regulations of the flux density in stator and rotor cores and the distribution of loss density of motor which fed by different frequency of carrier wave and modulation index. The results showed that, the harmonic flux density of iron focuses on the center of stator and rotor tooth tip under variable frequency power supply. With the carrier frequency increase, the total iron losses decreased but the variation was minor. With the modulation index increased, the harmonic content of the inverter output voltage and the loss density of harmonic loss in stator core reduce, and the total iron loss decreases. The correctness was verified by the experiment on the no-load operating status of 5. 5 kW motor.