摘要
齿槽转矩不仅会增加电机的转矩波动和振动噪声,还会影响电机的控制精度。本文提出一种径向变槽口宽度的定子铁心来削弱轴向磁通永磁电机的齿槽转矩。该方法将定子铁心沿径向分为多层,通过改变定子槽口宽度来改变每层齿槽转矩的幅值和相位,令层间齿槽转矩相位相反或幅值最小来削弱总的齿槽转矩。基于所提出的方法研究了径向槽口宽度分布特点对齿槽转矩的影响,并总结了规律,为削弱轴向磁通永磁电机齿槽转矩提供参考。采用该方法对一台10极12槽轴向磁通永磁电机进行优化,优化后的齿槽转矩峰峰值由636.16 mN·m降到55.80 mN·m,降低了91.23%,实验结果验证了所提出的轴向磁通永磁电机齿槽转矩削弱方法的有效性。
Cogging torque not only increases torque ripple,vibration and noise,but also affects control accuracy.A stator core with various slot openings width along radial direction was proposed to minimize cogging torque of axial flux permanent magnet(AFPM)motors.The proposed method divides the stator core into multiple layers along radial direction,and changes the phase and amplitude of the cogging torque per layer by changing their slot opening widths,so that the cogging torques between layers cancel out,or the amplitude of the cogging torque on each layer is minimized,to weaken the total cogging torque.Based on the proposed method,the influence of radial slot width arrangement on cogging torque was studied and the rules were summarized,providing a reference for minimizing the cogging torque of the AFPM motors.The proposed method was employed to optimize the cogging torque of a 10-pole 12-slot AFPM motor,the optimized cogging torque was reduced from 636.16 mN·m to 55.80 mN·m,a decrease of 91.23%,verifying effectiveness of the proposed method.
作者
王超
彭兵
甄东芳
WANG Chao;PENG Bing;ZHEN Dongfang(School of Electric Engineering,Shenyang University of Technology,Shenyang 110870,China;China Oilfield Services Ltd.,Tianjin 300455,China)
出处
《电机与控制学报》
北大核心
2025年第1期111-120,共10页
Electric Machines and Control
基金
国家自然科学基金(52177054)。
关键词
轴向磁通电机
永磁电机
齿槽转矩
转矩波动
径向变槽口宽度
分层法
axial flux motor
permanent magnet motor
cogging torque
torque ripple
various slot openings
multilayer method
