Abstract
In this paper, a novel rotor design of claw-pole alternators for characteristics improvement is proposed from the results of both experiment and calculation. In the calculation, the magnetic field in the machine is separated into those produced by field current, armature current, and eddy current of the core by using the three-dimensional finite-element analysis with a frozen permeability technique in order to understand the main factor that determines the maximum output. From these results, a novel rotor design is proposed. The experimental verification is carried out by using the prototype machines. It is clarified that the output of the proposed machine increases, whereas the core loss decreases, as compared with the conventional machine.
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