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首页> 外文期刊>Magnetics, IEEE Transactions on >Operating Torque Estimation of High-Speed Slotless Brushless DC Machine Considering Power Loss
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Operating Torque Estimation of High-Speed Slotless Brushless DC Machine Considering Power Loss

机译：考虑功率损耗的高速无槽无刷直流电机的工作转矩估计

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摘要

Torque is very essential for performance evaluation of electric machines because it is directly connected with power loss for dynamic characteristics. To evaluate dynamic performance, torque with harmonic component according to time is introduced. Particularly, eddy current loss is significantly increased at high speed, so it is difficult to express the dynamic characteristic without reflection about losses. Therefore, in this paper, rotor eddy current loss wave is derived by fast Fourier transform which uses the phase current wave obtained from finite element analysis according to two conditions: one has rotor eddy current loss, the other does not. The core loss is deduced by a modified Steinmetz equation and additional losses are considered from an experiment. Those losses are worked as drag torque which is inverse force to performance of a machine. The operating torque estimated from the difference between drag torque and electric torque closely reflects the dynamic characteristics.
机译：扭矩对于电机的性能评估非常重要，因为扭矩与功率损耗直接相关，以实现动态特性。为了评估动态性能，引入了根据时间具有谐波分量的转矩。特别地，涡流损耗在高速下显着增加，因此在不反映损耗的情况下难以表达动态特性。因此，本文中的转子涡流损耗波是通过快速傅里叶变换得到的，它使用有限元分析获得的相电流波根据两个条件：一个具有转子涡流损耗，另一个没有。磁芯损耗由修改后的Steinmetz方程推导出来，并从实验中考虑了其他损耗。这些损失作为阻力转矩而起作用，它是对机器性能的反作用力。根据阻力转矩和电气转矩之间的差异估算的工作转矩紧密反映了动态特性。

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