Patent ID: 9653976
Date: 2017-05-16
CPC Classifications: H02K,Y10T

Claim:
1. A method of manufacturing a rotor for an electric rotating machine, the rotor including a Lundell type rotor core, in which a magnetic coil including a bobbin and the winding in which a conductive line is wound around the bobbin is disposed between a pair of pole cores opposed to each other, and the pole cores and the magnetic coil are fixed by a shaft, wherein each of the pole cores includes a cylindrical boss part, a disc part extending from an outside face of one end of the boss part, and a plurality of pawl parts extending from a periphery of the disc part to a second end of the boss part, a V-shaped groove is formed between adjacent pawl parts so as to reach the periphery of the disc part, and the pawl part of one of the pole cores is engaged with the V-shaped groove of a second one of the pole cores via a required clearance, thereby forming a wavy clearance continuous in a circumferential direction, and the wavy clearance has two turning parts, each of the two turning parts being turned at a lateral position of the disc part, and a window having a substantial parallelogram shape from which an outer surface of the winding is exposed, the window being formed between the two turning parts, the method comprising: dropping uncured resin only to the window having the substantial parallelogram shape, including on at least one part area of the outer surface of the winding through the window, spreading the uncured resin, immediately after dropping, on the outer surface of the winding, and impregnating the uncured resin into the outer surface of the winding other than the one part area.