Patent ID: 8415856

Claim:
A rotor for an electric rotating machine, the rotor comprising: a rotor core that is formed of a plurality of magnetic steel sheets laminated in an axial direction of the rotor core; and a plurality of magnetic poles formed on a radially outer periphery of the rotor core, the magnetic poles being arranged at predetermined intervals in a circumferential direction of the rotor core so that polarities of the magnetic poles alternate between north and south in the circumferential direction, wherein the magnetic steel sheets forming the rotor core are welded so that a plurality of welds are formed on one of radially outer and inner surfaces of the rotor core, each of the welds has a pair of axial end portions that are offset from each other in the circumferential direction of the rotor core and electrically connected to each other, the welds are formed on the one of the radially outer and inner surfaces of the rotor core so as to adjoin one another in the circumferential direction of the rotor core, and each adjoining pair of the welds forms a substantially “V” shape that opens toward one axial end of the one of the radially outer and inner surfaces of the rotor core.