电机与控制学报
電機與控製學報
전궤여공제학보
ECTRIC MACHINES AND CONTROL
2015年
4期
40-45,52
,共7页
模块组合式定子%永磁电机%边端力%优化%削弱
模塊組閤式定子%永磁電機%邊耑力%優化%削弱
모괴조합식정자%영자전궤%변단력%우화%삭약
module combination stator%permanent magnet synchronous machine%end cogging force%opti-mization%weaken method
针对低速大功率电机过大的体积给其制造、运输、装配和维护带来困难以及可靠性低等问题，提出一种采用不等跨距绕组的模块组合式定子永磁电机结构，实现定子的模块化制作，增强电机的可靠性和容错性。为了提高模块组合式定子永磁电机运行的平稳性和控制精确度，分析其力矩波动的来源，指出由相邻定子模块之间装配、固定及维修所需的缝隙引起的定子边端磁导突变是边端力产生的主要根源，利用Schworz-Christistoffel变换法求取了电机定子模块边端处的气隙磁场分布，有限元分析结果验证了选用方法的合理性。最后对边端力进行了求解，并采用优化定子模块宽度和定子模块铁心轴向错位结构两种方法对合成边端力进行了削弱研究。仿真结果表明了两种方法对于削弱定子模块边端力的有效性。
針對低速大功率電機過大的體積給其製造、運輸、裝配和維護帶來睏難以及可靠性低等問題，提齣一種採用不等跨距繞組的模塊組閤式定子永磁電機結構，實現定子的模塊化製作，增彊電機的可靠性和容錯性。為瞭提高模塊組閤式定子永磁電機運行的平穩性和控製精確度，分析其力矩波動的來源，指齣由相鄰定子模塊之間裝配、固定及維脩所需的縫隙引起的定子邊耑磁導突變是邊耑力產生的主要根源，利用Schworz-Christistoffel變換法求取瞭電機定子模塊邊耑處的氣隙磁場分佈，有限元分析結果驗證瞭選用方法的閤理性。最後對邊耑力進行瞭求解，併採用優化定子模塊寬度和定子模塊鐵心軸嚮錯位結構兩種方法對閤成邊耑力進行瞭削弱研究。倣真結果錶明瞭兩種方法對于削弱定子模塊邊耑力的有效性。
침대저속대공솔전궤과대적체적급기제조、운수、장배화유호대래곤난이급가고성저등문제，제출일충채용불등과거요조적모괴조합식정자영자전궤결구，실현정자적모괴화제작，증강전궤적가고성화용착성。위료제고모괴조합식정자영자전궤운행적평은성화공제정학도，분석기력구파동적래원，지출유상린정자모괴지간장배、고정급유수소수적봉극인기적정자변단자도돌변시변단력산생적주요근원，이용Schworz-Christistoffel변환법구취료전궤정자모괴변단처적기극자장분포，유한원분석결과험증료선용방법적합이성。최후대변단력진행료구해，병채용우화정자모괴관도화정자모괴철심축향착위결구량충방법대합성변단력진행료삭약연구。방진결과표명료량충방법대우삭약정자모괴변단력적유효성。
Aiming at the large volume of low-speed and high-power machine bringing the problems of manu-facturing, transportation, installation and maintenance difficulties, a permanent magnet synchronous ma-chine with module combination stator based on unequal span winding was proposed. This structure achieves modular manufacturing of low-speed and high-power machine, and enhances the manufacturing flexibility, operation reliability, maintenance and fault tolerance. In order to improve the operation stability and con-trol precision of permanent magnet synchronous machine with combination stator, the sources of torque rip-ple was analyzed and module stator end magnet conductivity mutation was the main origin of end cogging force was pointed out. By adopting Schworz-Christistoffel transform method, the air-gap magnetic field dis-tribution of the module stator end was calculated, and finite element analysis results verified its rationality. Finally, the end cogging force was solved, and the weakening of synthesis of end cogging force was studied by two methods of optimizing the module stator width and module stator axial dislocation structure. The simulation results show the effectiveness of reducing end cogging force of two methods above.
