Patent ID: 7605511
Filing Date: 2009-10-20
Classification: H02K,Y10T

Abstract:
1. A vehicular alternator comprising: a pair of pole cores having a plurality of claw poles of a predetermined number extending an axial direction of the pole cores, and alternately arranged in a circumferential direction of the pole cores at a predetermined pitch; a field coil wound on a boss part of each pole core; permanent magnets arranged in a gap between adjacent claw poles in the circumferential direction in order to reduce magnetic leakage of the claw poles; magnet holders of non-magnetic characteristic, each magnet holder having a rectangular prism shape supported by the adjacent claw poles arranged in the circumferential direction, and each magnet holder accommodating and protecting the permanent magnet by which the permanent magnet is supported between the adjacent two claw poles; and connecting plate parts through which the magnet holders are connected in a ring shape, wherein the magnet holders and the connecting plate parts are made of a same non-magnetic metal plate sheet and integrated together, wherein each connecting plate part extends, in a circumferential direction of the pole cores, from an inner radial surface of each magnet holder, wherein the connecting plate part is disposed facing a front tip part of the claw pole in the radial direction, and wherein the magnet holder has elastic projections capable of elastically projecting toward the side surfaces of the adjacent claw poles.