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International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3

Yi Xie
Yi Xie
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ASME Press
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Cogging torque is one of the most important parameters of permanent magnet motors, which causes torque ripple, vibration and noise. The mechanism of cogging torque is described. Several methods of reducing cogging torque are introduced. And the advantage of novel magnet arrayed permanent magnet motor in reducing cogging torque is pointed out. Ansoft software is used to build the simulation of conventional surface-type permanent magnet motor and novel magnet arrayed permanent magnet motor to calculate their cogging torque. A cogging torque testing system which included the angle sensor, permanent magnet motor, torque wrenches and other components are used to tested...

Key Words
1 Introduction
2. Pole Width Modulation Theory of PM Motor
3 Pole Width Modulation PM Motor Reduces Cogging Torque
4. Summaries
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