CAJ | 학술논문

为了研究高速内置式永磁电机转子机械强度，根据受力平衡原理，推导了极端情况下内置式高速永磁电机转子隔磁桥最大应力的解析计算公式。利用该解析公式和有限元方法分别分析了隔磁桥宽度对最大应力的影响规律，得到解析解和有限元计算结果最大偏差在7．5%以内，证明了解析推导的正确性。通过将永磁体沿圆周方向进行分段，增加隔磁桥的数量，将应力分散到多个隔磁桥上，以减小应力最大值。利用有限元方法分析了永磁体不分段、分两段和分三段时转子强度和空载漏磁因数，通过与未分段进行对比，永磁体分两段和分三段时隔磁桥最大应力分别减小58．5%和71．2%，而空载漏磁因数随着分段数增加而增大。
위료연구고속내치식영자전궤전자궤계강도，근거수력평형원리，추도료겁단정황하내치식고속영자전궤전자격자교최대응력적해석계산공식。이용해해석공식화유한원방법분별분석료격자교관도대최대응력적영향규률，득도해석해화유한원계산결과최대편차재7．5%이내，증명료해석추도적정학성。통과장영자체연원주방향진행분단，증가격자교적수량，장응력분산도다개격자교상，이감소응력최대치。이용유한원방법분석료영자체불분단、분량단화분삼단시전자강도화공재루자인수，통과여미분단진행대비，영자체분량단화분삼단시격자교최대응력분별감소58．5%화71．2%，이공재루자인수수착분단수증가이증대。
In order to study the rotor mechanical strength of a high speed interior permanent magnet motor ( IPM) , analytic calculation formula for maximum stress of magnetic barrier in extreme cases was derived based on the force balance principle. The influence law of magnetic barrier width on maximum stress was analyzed on the basis of the proposed analytical calculation formula and finite element method. The maxi-mum deviation between analytical calculation results and finite element method results was within 7. 5%, which verified the correctness of the analytical derivation. The permanent magnet was segmented along the circumference direction to increase the number of magnetic barrier, so that the maximum stress was decreased. The mechanical strength and no load magnetic leakage factor were analyzed by finite element method in the case of permanent magnet without segmentation, being divided into 2 segments and being divided into 3 segments. Compared with the unsegmented condition, the maximum stress of magnetic bar-rier can be reduced by 58. 5% for 2 segments, and 71. 2% for 3 segments. The no load magnetic leakage factor increases with the increase of magnet segments.