【摘要】 高速电动机中,随着铁心内磁场变化及频率增大,铁耗也在增大。给出了永磁电机铁心损耗的计算模型。该模型结合二维时步有限元法进行分析计算,对一台20 000 r/m in的高速储能永磁无刷直流电动机进行了分析计算,给出其不同位置的损耗密度;最后对计算结果和测量结果进行了分析比较,验证了此分析模型的有效性。研究为进一步对电动机进行优化设计和减少损耗奠定了基础。更多还原

【Abstract】 In high speed motor,the iron loss increases along with the alternant frequency of the magnetic field in the iron.A calculation model of iron losses of rotational permanent motor is proposed,considering the influence of the rotation.The 2D time-step finite element has been used for calculating a 20 000 r/min high speed permanent brushless DC motor,the loss density of deferent positions is proposed.Finally,the experimental measured value is compared with the computered one.The results prove the model is valid,which is the base of deeply optimization design for minishing the loss.更多还原