| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotor core and a method for manufacturing the same, capable of non-magnetizing a bridge by heat treatment while suppressing a short circuit between core sheets laminated in a rotary shaft direction.SOLUTION: A cylindrical rotor core 10 is formed by laminating a plurality of core sheets S1 in a rotary shaft direction, the core sheets each obtained by forming an electromagnetic steel plate into a predetermined shape, the core sheets being arranged so that a plurality of magnet holes S11 provided in the core sheets S1 are communicated with each other in the rotary shaft direction. The core sheet S1 includes an opening A in which an end of the magnet hole S11 is opened in an outer periphery of the core sheet S1, and a bridge B provided between the end of the magnet hole S11 and the outer periphery of the core sheet S1. At least one of the openings A is disposed at a position adjacent to the bridge B in the rotary shaft direction, and the bridge B is non-magnetized by heat treatment.</p> |
