Patent ID: 8836183

Claim:
A rotating machine comprising: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub through a bearing unit; a core that is fixed to the base and includes an annular portion and at least one salient pole radially extending from the annular portion; and a three-phase coil formed by winding wires around the salient pole, wherein the wires are placed to the back surface of the base through a plurality of thru-holes provided in the base and soldered to wiring, the thru-holes including first thru-holes, each provided for one wire, and a second thru-hole provided for a plurality of wires in a bundle, and wherein the second thru-hole has an opening area larger than that of each of the first thru-holes, the rotating machine further comprising: an insulation sheet which is attached to the surface of the base, the surface facing the coil, and in which cutting portions are respectively provided in accordance with the plurality of thru-holes, and at least part of the circumference of each of the plurality of thru-holes is covered with the insulation sheet, and the radial width of the insulation sheet is set in accordance with the radial width of the coil and the circumferential length of the insulation sheet is set in accordance with the gap between the plurality of thru-holes.