Loss Calculation for High Speed Permanent Magnet Claw Pole Outer Rotor Machine

Guangwei Liu, Xingang Zhao, Zhao Xin, Fengge Zhang

COMPUTER MODELLING & NEW TECHNOLOGIES 2013 17(5D) 42-46

School of Electrical Engineering, Shenyang University of Technology, 110870, China

In view of higher frequency electromagnetic field and higher speed rotation comparing with conventional machine, the loss of high speed claw pole permanent magnet outer rotor machine should be considered seriously. In this paper, its structure and operation principle was introduced, and the three dimension magnetic field distribution is analyzed. A new iron loss calculation model is built in consideration of three-dimension quadrature alternative and harmonic magnetic field. In addition, the calculation model of air friction loss and its influencing factors, such as rotor speed, surface roughness and axial ventilation speed, are analyzed. The results of the finite element analysis validate accuracy of that of theory analysis.