Outer-rotor type electric rotary machine and electric motor vehicle using the machine
AssigneesKabushiki Kaisha Toshiba, Railway Technical Research Institute
InventorsNobuyuki Yagi, Ko-ichi Matsuoka, Keiichiro Kondo
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Abstract
An outer-rotor type electric rotary machine comprises a shaft fixed to a stationary unit, a motor stator, a motor rotor, a cylindrical rotor frame, and first and second brackets attached to rotary members, respectively. At least one of the first and second brackets includes a plurality of heat-radiating fins mounted on its outer peripheral surface, and a plurality of heat-absorbing fins mounted on its inner peripheral surface.
Claims20
An outer-rotor type electric rotary machine located at a stationary unit for rotating rotary members, comprising:
- a shaft fixed to the stationary unit;
- a motor stator fixed to a longitudinally middle portion of the shaft;
- a motor rotor located opposed to the motor stator with a certain gap interposed therebetween, the motor rotor being rotated about the motor stator by an electro magnetic force generated between the motor rotor and the motor stator;
- a cylindrical rotor frame to which the motor rotor is attached;
- and
- first and second brackets attached to both opposite ends of the cylindrical rotor frame, respectively, each of the first and second brackets having the other end thereof fixed to a corresponding one of the rotary members and including an outer peripheral surface and an inner peripheral surface, at least one of the first and second brackets having a plurality of heat-radiating fins mounted on the outer peripheral surface, and a plurality of heat-absorbing fins mounted on the inner peripheral surface.
An electric motor vehicle having an outer-rotor type electric rotary machine, comprising:
- a vehicle truck;
- an axle shaft fixed to the vehicle truck;
- a motor stator fixed to a longitudinally middle portion of the shaft;
- a motor rotor located opposed to the motor stator with a certain gap interposed therebetween, the motor rotor being rotated about the motor stator by an electric magnetic force generated between the motor rotor and the motor stator;
- a cylindrical rotor frame to which the motor rotor is attached;
- first and second brackets attached to both opposite ends of the cylindrical rotor frame, respectively, each of the first and second brackets including an outer peripheral surface and an inner peripheral surface, at least one of the first and second brackets having a plurality of heat-radiating fins mounted on the outer peripheral surface, and a plurality of heat-absorbing fins mounted on the inner peripheral surface;
- first and second bearings provided at both opposite ends of the axle shaft;
- and
- first and second wheels fixed to the axle shaft via the first and second bearings, respectively, and also to the other ends of the brackets, respectively.
Dependencies are inferred from the claim text.