Patent ID: 7784168

Claim:
A magnet protection method of protecting magnet bodies to be mounted on a rotor in a rotary electric machine, comprising a step of: before the rotor is assembled into a stator in the rotary electric machine, covering at least an outer exposed surface of each magnet body including a magnetized magnet at an outer peripheral side thereof with a magnet covering member made of soft magnet metal which is detachably supported by the rotor, wherein an outer surface of each magnet body is placed radially inward from an outer peripheral surface of a rotor core of the rotor in the rotary electric machine, before cutting and grinding the outer peripheral surface of the rotor core, the magnet covering member is attached onto at least the outer surface of each magnet body at an outside position of a radial direction from the outer surface of the magnet body and radially inward of the outer surface of the rotor core, and the magnet covering member is detached from the magnet body after completion of cutting and grinding the outer peripheral surface of the rotor core and before assembling the rotor into the stator of the rotary electric machine.