Effect of Slotting in Pm Electric Machines

Abstract
The effect of sinttinq in permanent magnet electric machines differs from that in wound field ones. An analytically extended field model for slotted permanent magnet machines is presented in this paper. By using the model, the Carter's coefficient for permanent magnet machines can be easily deduced from the Carter's classical formula. The closed-form solution to the problem at hand is exact and much simpler than that of previously approximate methods.

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