Analysis of characteristics of power losses and efficiency of amorphous alloy permanent magnet motor
- Publication Type:
- Journal Article
- Dianji yu Kongzhi Xuebao/Electric Machines and Control, 2017, 21 (7)
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© 2017, Harbin University of Science and Technology Publication. All right reserved. In order to study the characteristics of power losses and efficiency of the permanent magnet motor when the silicon steel core is replaced by the amorphous alloy core, two permanent magnet motors are produced which have the same specifications. One core of the motors is made of silicon steel sheet and the other core of the motors is made of amorphous alloy material. The characteristics of power losses and efficiency of the two motors were measured at the same operating situation. Power losses were also analyzed at various load ratios by using finite element analysis. The results show that, the core loss of amorphous alloy motor is lower than that of the silicon steel motor when the load is light, and the efficiency of amorphous alloy motor is superior to silicon steel motor. But with the increase of load ratio, the core of amorphous alloy motor is poorly saturated, the waveform of MMF distorts a lot, and the losses caused by MMF harmonics are higher in amorphous alloy motor than that in the silicon steel motor, which leads to a reduction of superiority of efficiency with the increase of load ratio.
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