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Low cogging torque and high efficient 3-phase spindle motors by reshaping magnetic circuit profiles

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3 Author(s)
Kuo-Chi Chiu ; Inst. of Electro-Opt. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Huang, Der-Ray ; Shieh, Han-Ping D.

The dynamic characteristics of a 3-phase spindle motor with 12-poles and 9-slots can be improved by reshaping the magnetic circuit profiles. The stator cores were designed with different ratios of x/y where x is the gap angle between 2-slots and y is the expanded angle of a slot. Experiment and finite element analyses (FEA) results show that x/y ratio of 1/2.5 is an optimal design in achieving dynamic performance for DVD drives applications

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )