Patent ID: 6369485
Filing Date: 2002-04-09
Classification: H02K

Abstract:
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.