CAJ | 학술논문

开关频率引起的高频电磁力是变频供电异步电机电磁噪声的主要激振源之一，而高频电磁力的定量计算成为变频异步电机噪声计算的难题之一。本文考虑变频器输出电压的基本特征，运用场路耦合基本理论，建立变频器供电条件下的场路耦合时步有限元模型。通过详细对比分析电压、电流、气隙磁密和径向电磁力的谐波成分，获得开关频率引起的高频谐波及其关系。研究结论和计算方法可为变频供电异步电机低噪声设计和研发提供帮助。
개관빈솔인기적고빈전자력시변빈공전이보전궤전자조성적주요격진원지일，이고빈전자력적정량계산성위변빈이보전궤조성계산적난제지일。본문고필변빈기수출전압적기본특정，운용장로우합기본이론，건립변빈기공전조건하적장로우합시보유한원모형。통과상세대비분석전압、전류、기극자밀화경향전자력적해파성분，획득개관빈솔인기적고빈해파급기관계。연구결론화계산방법가위변빈공전이보전궤저조성설계화연발제공방조。
High-frequency electromagnetic force caused by switching frequency is one of the main excitation source of the inverter-fed asynchronous motor's electromagnetic noise.The electromagnetic force's quantitative calculation has become the problem of calculation of inverter-fed asynchronous motor's noise.In this paper,a field-circuit coupled time-stepping finite element model of squirrel-cage asynchronous motors of inverter power supply was established which considered the basic characteristics of the inverter output voltage.The harmonic component of stator line voltage,phase current,the air gap flux density and the radial electromag-netic force were detailly analyzed ,which found the high frequency harmonic caused by switching frequen-cy.The conclusions and numerical computation method provide help to the further design &development of low noise asynchronous motor by inverter-fed.