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US 6,661,151 B2Granted
Alternator for vehicles having permanent magnets in rotor
AssigneeDenso Corporation
InventorsYoshiki Tan, Nakato Murata
Life of this patent
Estimating the term…
Abstract
A brushless-type alternator has a rotor, which comprises a pair of pole cores. The pole cores include a plurality of nail parts, respectively. The nail parts are arranged alternately in a rotating direction of the rotor. The nail parts are coupled to-each other with a non-magnetic ring. A permanent magnet is interposed between adjacent two of the nail parts, and fixedly held in position with the non-magnetic ring. The permanent magnets are located radially inside or outside the non-magnetic ring.
Claims8
An alternator, comprising:
- a frame;
- a shaft;
- a stator coil fixed to the frame;
- a field coil fixed to the frame;
- a pair of pole cores each having a plurality of nail parts, respectively, the pole cores being supported rotatably by the frame through the shaft;
- a non-magnetic ring coupling the nail parts, wherein the nail parts are coupled adjacent to each other in a rotation direction of the pole cores;
- and
- a plurality of permanent magnets interposed between the nail parts and fixed to the non-magnetic ring, wherein one of the pole cores is fixed to the shaft and the other of the pole cores is fixed to the one of the pole cores through the ring, wherein at least one of the non-magnetic ring and each of the permanent magnets has a slit groove at a location of engagement therebetween and the non-magnetic ring has the slit grooves at a radially inner side thereof and the permanent magnets have the slit grooves at a radially outer side thereof and wherein the permanent magnets are arranged radially inside the non-magnetic ring.
5 more elements
An alternator, comprising:
- a frame;
- a pair of pole cores supported rotatably in the frame and having a plurality of nail parts, respectively;
- a non-magnetic ring coupling the nail parts, wherein the nail parts are coupled adjacent to each other in a rotation direction of the pole cores;
- and
- a plurality of permanent magnets interposed between the nail parts and fixed to the non-magnetic ring, wherein the non-magnetic ring and each of the permanent magnets have respective slit grooves which engage with each other.
2 more elements
An alternator, comprising:
- a frame;
- a field coil supported fixedly to the frame;
- a pair of pole cores each having a plurality of nail parts, respectively;
- a non-magnetic ring coupling the nail parts adjacent to each other in a rotation direction of the pole cores;
- and
- a plurality of permanent magnets interposed between the nail parts and fixed to the non-magnetic ring, wherein at least one of the non-magnetic ring and each of the permanent magnets has a slit groove at a location of engagement therebetween, and the non-magnetic ring has the slit grooves at a radially inner side thereof and the permanent magnets have the slit grooves at a radially outer side thereof, inside the non-magnetic ring.
3 more elements
Dependencies are inferred from the claim text.