Rotor for rotary electric machine

摘要

A rotor for a rotary electric machine includes a pair of Lundell-type cores, a plurality of magnets, and a magnet retainer. The pair of Lundell-type cores includes a plurality of claw poles with flange portions projecting to a circumferential direction of the rotor from an end portion on an outer diameter side of each of the claw poles. The plurality of magnets are arranged between the pair of Lundell-type cores, and are magnetized in a direction of reducing flux leakage. The magnet retainer retains each of the magnets, and has side surfaces in the circumferential direction. At least one of the side surfaces is provided with at least one projection for restraining movement of the magnet retainer in an axial direction along a rotary shaft.

主权项

1. A rotor for a rotary electric machine, comprising:
a pair of Lundell-type cores that include a plurality of claw poles with flange portions projecting in a rotor circumferential direction from an end portion on an outer diameter side; a plurality of magnets that are arranged between the claw poles of the pair of Lundell-type cores and that are magnetized in a direction of reduced or minimized flux leakage; and a magnet retainer that is provided for each of the magnets, that retains each of the magnets and that includes a projection in at least one of side surfaces in a magnet retainer circumferential direction, the projection restraining a movement of the magnet retainer in an axial direction along a rotary shaft, wherein: the magnet retainer includes: (i) a first surface that faces the flange portions of the claw poles adjacent to each other in the rotor circumferential direction via the magnet, (ii) a second surface that faces a circumferential side surface of one of the claw poles adjacent to each other, and (iii) a third surface that faces a circumferential side surface of the other of the claw poles adjacent to each other; and the projection is configured to be foldable and is in contact with an end portion in the axial direction of each of the claw poles adjacent to each other via the magnet.