Rotor of alternator mounted on vehicle
AssigneeDenso Corporation
InventorsShigenobu Nakamura, Takayasu Nimura, Toshiaki Hotta
Life of this patent
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Abstract
An improved construction of a ..Randel.!. Lundell -type rotor of a vehicle-mounted alternator, capable of reducing the windage noise which is produced as a result of interference between the rotor and the stator of the alternator. The rotor has a pair of pole cores provided with a plurality of mutually meshing claws, and an exciting coil disposed at the inner side of the pole cores. Spacers in the form of an integral ring or discrete wedges are fitted in the spaces between adjacent pole core claws so as to provide a substantially smooth cylindrical outer peripheral surface of the rotor portion facing the radial teeth on the stator.
Claims12
In a vehicle-mounted alternator having a rotor including a pair of ..Randel.!. Lundell -type pole cores having mutually meshing claws and an exciting coil provided at the inner side of said pole cores, and a stator having teeth extending radially inwardly to oppose said rotor,
- an improved rotor construction comprising:
- spacers made of a non-magnetic material and disposed between adjacent pole core claws of said pole cores in such a manner as to provide, together with said claws, a substantially smooth cylindrical outer peripheral surface for a portion of said rotor facing said teeth of said stator which prevents the flow of air radially between said claws of said portion and also provide a space constituting a passage for cooling air axially between the inner sides of said spacers and the outer peripheral surface of said exciting coil.
Dependencies are inferred from the claim text.