Patent ID: 9024502
Filing Date: 2015-05-05
Classification: H02K

Abstract:
1. A stator for a rotating electrical device disposed radially outward and facing a rotor, the rotor rotatably attached to a housing, comprising: a stator retaining ring provided with fixing flanges extending outward in a radial direction from an end portion in an axial direction of a cylinder portion of the stator retaining ring, the stator retaining ring being fixed to the housing at the fixing flanges by screws; and a plurality of cores, each wound with a coil, arranged in an annular form and attached to an inner peripheral surface of the cylinder portion, wherein groups of through-holes extending through the fixing flanges are arranged in a state where a predetermined separation distance in a circumferential direction is defined between the groups of the through-holes where each of the groups of the through-holes includes a plurality of the through-holes arranged near to one another through which the screws are inserted, and wherein adjacent ones of the through-holes belonging to a same group are separated by a separation distance in the circumferential direction that is smaller than the separation distance in the circumferential direction separating adjacent ones of the through-holes belonging to different groups of the through-holes, wherein a recess is formed on each of the fixing flanges, the recess extending in the radial direction from an outer periphery of each of the fixing flanges between the adjacent through-holes belonging to the same group of the through-holes.