| 摘要 |
PURPOSE:To hinder permanent magnets from falling off by providing wedge- shaped resin-bonded layers between a plurality of arcuate permanent magnets each formed into a taper, and a rotor yoke so that they are formed into an integral body. CONSTITUTION:A plurality of arcuate permanent magnets 13 provided in the manner of being longer than inside face arcuate parts contacting a rotor yoke 12 are arranged circumferentially around the periphery of said yoke 12 so that each space (g) between adjacent permanent magnets 13 spreads almost triangularly. Then, these permanent magnets 13 except only their outside faces are integrally joined and fixed to the rotor yoke 12 by thermoseting synthetic resin, and wedge shaped resin-bonded layers 14 formed in spaces (g) between respective permanent magnets 13 prevent said permanent magnets 13 from falling off and so on.
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