Patent ID: 7958621

Claim:
A method of manufacturing a rotor for a rotating electrical machine, comprising the steps of: a) preparing a first and a second pole core, a rotary shaft, and a field coil, each of the first and second pole cores having a base portion for mounting thereon the field coil and a plurality of claw portions for forming magnetic poles upon energizing the field coil, each of the first and second pole cores also having a through-hole formed in the base portion for press-fitting therein the rotary shaft and a contact surface for establishing intimate contact between the pole cores, the contact surface being oblique to an axis of the through-hole; b) press-fitting the rotary shaft into the through-hole of the first pole core so that an axis of the rotary shaft coincides with the axis of the through-hole; c) mounting the field coil on the base portion of one of the first and second pole cores; d) opposing the first and second pole cores to each other so that the axes of the through-holes thereof are in alignment with each other and the contact surfaces thereof face each other with a maximum parallelism therebetween; and e) press-fitting the second pole core onto the rotary shaft so that the contact surfaces of the first and second pole cores maximally contact with each other and the axis of the rotary shaft coincides with the axes of the through-holes of the pole cores.