CAJ | 학술논문

直驱型多相永磁同步电机由于相数多、采用分数槽绕组结构、电机的中性点连接与PWM控制方式多样等特点，使得电机绕组电流与磁场谐波含量极为复杂，电机性能与普通三相电机相比有较大区别，因此，有必要对其电磁特性进行细致的研究。该文建立了直驱型多相永磁同步电机定子绕组磁动势数学分析模型，给出了详细推导过程。研究了电机绕组电流和磁动势的影响因素：相数与供电方式、中性点接法、极槽匹配与绕组分布。全面分析了以上因素对直驱型多相永磁同步电机电流及磁场的影响。研究结果表明，增加电机的相数和极槽数，合理的选择中性点连接方式，可以有效减少电机的谐波含量，提高电机的性能。
직구형다상영자동보전궤유우상수다、채용분수조요조결구、전궤적중성점련접여PWM공제방식다양등특점，사득전궤요조전류여자장해파함량겁위복잡，전궤성능여보통삼상전궤상비유교대구별，인차，유필요대기전자특성진행세치적연구。해문건립료직구형다상영자동보전궤정자요조자동세수학분석모형，급출료상세추도과정。연구료전궤요조전류화자동세적영향인소：상수여공전방식、중성점접법、겁조필배여요조분포。전면분석료이상인소대직구형다상영자동보전궤전류급자장적영향。연구결과표명，증가전궤적상수화겁조수，합리적선택중성점련접방식，가이유효감소전궤적해파함량，제고전궤적성능。
Due to the multiphase, fractional slot winding, variety of neutral point connection and PWM control modes, the stator currents and magnetic fields of the direct-drive multi-phase permanent magnet synchronous machine are very complex, and its performances are quite different from the general three phase machine. So it is necessary to study the electromagnetic characteristics. In this paper, an analysis model of stator winding MMF of direct-drive multi-phase permanent magnet synchronous machines was established. The influence factors of winding currents and MMF were studied, such as the phase number, the power supply mode, the neutral point connection mode and pole slot match. The impacts of these factors on the currents and magnetic fields of direct-drive multi-phase permanent magnet synchronous machines were analyzed. All studies verified that with the increase of the phase number, pole slot number and reasonable selection of neutral point connection modes, the harmonic magnetic field can be reduced effectively. The performances of the machine will be improved dramatically.