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This paper deals with 3D finite‐element calculation of eddy currents in the claws of a claw‐pole alternator taking the rotational geometry movement into account. Two transient edge‐based vector formulations are utilised. The reduction of the model to only one pole pitch in combination with a special boundary pairing in the air gap for the applied lock‐step method is presented. Calculations of varying material conductivity are performed with simplified end windings. The speed characteristics of the eddy currents with real conductivity and realistic end windings concludes the paper.
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Kaehler et al. (2003) studied this question.
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