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Line-start permanent-magnet motor single-phase steady-state performance analysis

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7 Author(s)
Miller, T.J.E. ; Dept. of Electr. Eng., Univ. of Glasgow, UK ; Popescu, M. ; Cossar, C. ; McGilp, M.
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This paper describes an efficient calculating procedure for the steady-state operation of a single-phase line-start capacitor-run permanent-magnet motor. This class of motor is beginning to be applied in hermetic refrigerator compressors as a high-efficiency alternative to either a plain induction motor or a full inverter-fed drive. The calculation relies on a combination of reference-frame transformations including symmetrical components to cope with imbalance, and dq axes to cope with saliency. Computed results are compared with test data. The agreement is generally good, especially in describing the general properties of the motor. However, it is shown that certain important effects are beyond the limit of simple circuit analysis and require a more complex numerical analysis method.

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Industry Applications, IEEE Transactions on  (Volume:40 ,  Issue: 2 )