改变转子单绕组变极接线方式的不等匝无刷双馈发电机

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摘要为了解决无刷双馈发电机转子单绕组变极等匝方案中每相并联支路磁动势相位不一致,以及转子绕组电流幅值不同导致磁动势百分比随负载变化而变化、降低了导线利用率的问题,本文提出不等匝设计方案和将3个自短接运行支路上的所有线圈反向连接后转移到相应连接线上的改进方案。通过有限元仿真分析等匝、不等匝和改进方案中的发电机运行特性,结果显示：不等匝方案减少了谐波含量,降低了并联支路电流幅值之差且改善了波形质量;改进方案的转子各支路电流波形质量良好、幅值相等,提高了导线整体利用率,进一步降低了谐波含量,同时磁动势含量百分比固定不变,便于发电机线性控制。

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	李龙金

关键词 ：无刷双馈发电机, 单绕组变极, 不等匝, 磁动势, 谐波含量

Abstract：In order to solve the problems that the magnetomotive force angles of parallel branches of each phase are different in the rotor single pole-changing equal-turn winding scheme of the brushless doubly-fed generator, and the current amplitudes of rotor winding branches are different resulting in the percentages of the magnetomotive force changing with the load and the reduction of the wire utilization, the unequal-turn design scheme and improved scheme for reversing all the coils of the three self-shorted branches to the corresponding connecting line are proposed. The generator operating characteristics of equal-turn, unequal-turn and improved scheme are simulated based on the finite element. Results show that the unequal-turn scheme reduces the harmonic contents, cuts down the difference among the current amplitudes of parallel branches and improves the waveform quality. In the improved scheme, the rotor branches waveforms quality is good, the current amplitudes are equal, the wire utilization rates are improved, the harmonic contents are furtherly reduced, and the magnetomotive force are fixed, which is easy for the generator control.

Key words： brushless doubly-fed generator single pole-changing winding unequal-turn mag-netomotive force harmonic content

收稿日期: 2024-12-19

作者简介: 贾磊（1986—）,男,河南信阳人,博士,讲师,主要研究方向为无刷双馈电机运行理论、建模与仿真、设计和优化。

引用本文:

贾磊, 李龙金. 改变转子单绕组变极接线方式的不等匝无刷双馈发电机[J]. 电气技术, 2025, 26(7): 21-31. JIA Lei, LI Longjin. The unequal-turn brushless doubly-fed generator with improved rotor single pole-changing winding connection mode. Electrical Engineering, 2025, 26(7): 21-31.

链接本文:

https://dqjs.cesmedia.cn/CN/Y2025/V26/I7/21

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