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| Design Consideration of Back-EMF Constant for 3-D.O.F. Spherical PM Motor |
| Journal of Magnetics, Volume 15, Number 2, 30 Jun 2010, Pages 78-84 |
Sung-chul Go (Department of Electrical Engineering, Hanyang University), Dong-woo Kang (Department of Electrical Engineering, Hanyang University), Jong-bin Im (Department of Electrical Engineering, Hanyang University), Ju Lee *  (Department of Electrical Engineering, Hanyang University), Sung-hong Won (Department of Electric System, Dongyang Technical College), Seung-Bin Lim (Korea Institute of Energy Technology Evaluation and Planning) |
| Abstract |
A 3-D.O.F. spherical PM motor has 3 degrees of freedom in its motion by tilting and rotating of a shaft, which can be applied in a range of fields. The back-EMF is proportional to the field flux and angular velocity. The back-EMF constant in conventional rotating machine has a uniform value. However, in a spherical PM motor, the back-EMF constant of the coils varies according to the tilting conditions regardless of whether the angular speed is constant. Consideration of the back-EMF constant is useful for designing 3-D.O.F. spherical PM motors. In this study, the back-EMF constant of the spherical PM motor was considered carefully.
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| Keywords: design; spherical motor; back-EMF; 3 degree of freedom |
| DOI: 10.4283/JMAG.2010.15.2.078 |
| Full Text: PDF |
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