Fast calculation method of AC copper loss for high speed machines

The model reduction method for the finite element analysis such as the zooming analysis is conducted to calculate the AC copper loss of the high speed electric machines. In this paper, the result of the zooming method is validated by the complete analysis and the calculation speed increases by 7.8 times of the complete analysis. Moreover, the zooming method is applied to the analysis of the copper loss of litz wire on the copper loss of an interior permanent magnet motor rotating high speed. The copper loss of litz wire can be calculated in a practical computation time.