Patent ID: 7256525

Claim:
A slot insulator, comprising: an annular plate; and a plurality of insulated winding parts disposed along a circumference of the annular plate, comprising: a pair of shorter side parts, each having a length in a center axis direction of the annular plate, which is n times as large as a thickness of a stator yoke, wherein n is an integer, and the pair of shorter side parts are arranged in a circumferential direction of the annular plate; and a longer side part which connects to each of the pair of shorter side parts so that the longer side part and the pair of shorter side parts surround an opening of an insertion groove on three sides at an inward end of the insulated winding part in a radial direction of the annular plate, wherein the insulated winding parts are disposed along an inner circumference of the annular plate and protrudes toward a center of the annular plate; wherein each of the insulated winding parts has an insulated winding holding part and the insertion groove capable of housing a winding part of a tooth in plural combined stator yokes, and the insertion groove opens in one direction along a center axis direction of the annular plate and opens at both ends of the insertion groove in the radial direction of the annular plate; and wherein the insertion groove is a groove capable of housing the winding part of the tooth in plural stator yokes combined in the center axis direction.