Rotor structure
First Claim
Patent Images
1. A rotor structure comprising:
- a rotor coil for generating a magnetic flux with a current;
a first pole core;
a second pole core;
a plurality of magnets; and
a plurality of holding members, wherein said first pole core and said second pole core each comprise a plurality of claw-like magnetic poles to cover said rotor coil, and wherein each claw-like magnetic pole of said first pole core and each claw-like magnetic pole of said second pole core are arranged in a peripheral direction on their respective first and second pole cores, each of said magnets is provided on respective peripheral outer side surfaces of each of said claw-like magnetic poles, each of said holding members being arranged annularly and separately and positioned to correspond to a respective claw-like magnetic pole, the number of said holding members being the same as that of said claw-like magnetic poles, each of said holding members comprises an inner holding part, a pair of outer peripheral holding parts, and a pair of outer radial holding parts, each of said inner holding parts is located on an inner side with respect to a radial direction of the claw-like magnetic pole and each of said inner holding parts holds an inner surface of said claw-like magnetic pole, each of said pairs of outer peripheral holding parts communicates with a respective inner holding part and holds respective outer peripheral surfaces of two magnets which are provided for a single claw-like magnetic pole, each of said pairs of outer radial holding parts communicates with a respective outer peripheral holding part and holds respective outer radial surface of said two magnets being provided for a single claw-like magnetic pole, and each of said plurality of holding members is separated from the other holding members in the peripheral direction with respect to said claw-like magnetic poles.
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Abstract
A rotor structure comprising magnets for suppressing the leakage of a magnetic flux between the side faces of the adjacent claw-like magnetic poles and metal holding members each of which covers the magnets together with the claw-like magnetic pole and radiates heat transmitted to the claw-like magnetic pole at the time of power generation. Therefore, the quantity of heat radiated to the peripheral portions of the magnets is increased and the coolability of the magnets can be greatly improved.
41 Citations
14 Claims
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1. A rotor structure comprising:
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a rotor coil for generating a magnetic flux with a current;
a first pole core;
a second pole core;
a plurality of magnets; and
a plurality of holding members, wherein said first pole core and said second pole core each comprise a plurality of claw-like magnetic poles to cover said rotor coil, and wherein each claw-like magnetic pole of said first pole core and each claw-like magnetic pole of said second pole core are arranged in a peripheral direction on their respective first and second pole cores, each of said magnets is provided on respective peripheral outer side surfaces of each of said claw-like magnetic poles, each of said holding members being arranged annularly and separately and positioned to correspond to a respective claw-like magnetic pole, the number of said holding members being the same as that of said claw-like magnetic poles, each of said holding members comprises an inner holding part, a pair of outer peripheral holding parts, and a pair of outer radial holding parts, each of said inner holding parts is located on an inner side with respect to a radial direction of the claw-like magnetic pole and each of said inner holding parts holds an inner surface of said claw-like magnetic pole, each of said pairs of outer peripheral holding parts communicates with a respective inner holding part and holds respective outer peripheral surfaces of two magnets which are provided for a single claw-like magnetic pole, each of said pairs of outer radial holding parts communicates with a respective outer peripheral holding part and holds respective outer radial surface of said two magnets being provided for a single claw-like magnetic pole, and each of said plurality of holding members is separated from the other holding members in the peripheral direction with respect to said claw-like magnetic poles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A rotor structure comprising:
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a rotor coil operable to generate a magnetic flux with a current;
a pole core covering the rotor coil and comprising a first pole core body and a second pole core body, each having claw-like magnetic poles situated to mate with each other at positions where they cover the peripheral surface of the rotor coil;
magnets provided on both sides of each of the claw-like magnetic poles operable to suppress the leakage of a magnetic flux between the side faces of the adjacent claw-like magnetic poles; and
metal holding members each of which fixes the magnets in contact with each of the claw-like magnetic poles in such a manner that said holding members cover the magnets together with the claw-like magnetic poles and radiate heat transmitted to the claw-like magnetic poles at the time of power generation to cool the magnets, wherein a root portion or end portion of the holding member extends in the axial directions of the first and second pole core bodies and projects from the claw-like magnetic poles. - View Dependent Claims (13, 14)
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Specification