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Nonlinear varying-network magnetic circuit analysis for doubly salient permanent-magnet motors

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5 Author(s)
Ming Cheng ; Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong ; K. T. Chau ; C. C. Chan ; E. Zhou
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In this paper, a nonlinear varying-network magnetic circuit (VNMC) modeling method is developed for doubly salient permanent-magnet (DSPM) motors. The method is used to analyze the static characteristics of DSPM motors by specific performance calculations, in which the interaction between the permanent-magnet field and the armature current field, as well as magnetic saturation, are taken into account. Two newly proposed DSPM motors (12/8-pole and 6/4-pole) are used as examples. There is good agreement between the results of the nonlinear VMMC modeling method and finite-element analysis. Moreover, the nonlinear VNMC method offers the advantage of calculating, effectively and efficiently, the static characteristics of DSPM motors having different dimensions, parameters, and conditions. Finally, the proposed method is verified by experimental testing of a 6/4-pole prototype.

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IEEE Transactions on Magnetics  (Volume:36 ,  Issue: 1 )