Rotating electric machine with magnetic gaps
Abstract:
A rotating electric machine includes an armature and a field rotor. The field rotor includes magnetic pole teeth, an annular body portion, a bypass gap portion and permanent magnets. The magnetic pole teeth are arranged so that the polarities thereof alternate between N and S in a circumferential direction of the field rotor. The annular body portion connects the magnetic pole teeth at their root portions. The bypass gap portion is provided on an opposite side of the annular body portion to the magnetic pole teeth. The permanent magnets are provided in the annular body portion so as to be spaced from one another in the circumferential direction. The bypass gap portion includes first magnetic gaps each of which is formed adjacent to one of the permanent magnets. Each of the permanent magnets is arranged within an inter-pole angular range between one circumferentially-adjacent pair of the magnetic pole teeth.
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