A Two-term Model for Accurate Calculation on Iron Losses of High-speed Permanent Magnet Motors
Based on the segmented iron losses calculation method with compensation term,this paper pro-posed a two-term mathematical model suitable for the accurate calculation of iron losses of high-speed perma-nent magnet motors.By combining the operating characteristics of high-speed motors,the frequency and magnetic density intervals were divided,and on the basis of the Jordan's iron loss model,eddy current and hysteresis loss compensation terms were introduced to consider the effects of magnetic saturation,local hys-teresis loops,skinning effect and other nonlinear factors on the unit loss characteristics of silicon steel sheets.The new parameters of the model were all segmented constant functions varying with frequency and magnetic density,which were solved by the L-M algorithm to reduce the computational volume while explicit-ly reflecting the influence of ferromagnetic material's nonlinearities on the calculation of iron losses,so as to realise the accurate calculation of iron losses.Finally,taking a high-speed motor with silicon steel wafer 35SWH1900 as an example,compared the calculation error of the proposed model with that of the Jordan's model in the unit loss,and the experimental results showed that the calculation error of the proposed model is basically within 15％,it can effectively improve the calculation accuracy of the iron losses of high-speed per-manent magnet motors.
high-speed motorscore losseddy current lossskin effecthysteresis loss
万方数据
维普
