Patent ID: 8227953
Filing Date: 2012-07-24
Classification: H02K

Abstract:
1. A rotor comprising: a rotor core having a circumference portion; a first magnet provided inside the rotor core; a second magnet provided inside the rotor core; a first pole pitch line extending along a radial direction of the rotor core; a second pole pitch line extending along the radial direction of the rotor core and being adjacent to the first pole pitch line; the first magnet and the second magnet being provided between the first pole pitch line and the second pole pitch line; the first magnet being provided closer to the first pole pitch line than to the second pole pitch line, the second magnet being provided closer to the second pole pitch line than to the first pole pitch line; a distance between the first magnet and the second magnet at a position being wider as the position is closer to the circumference portion of the rotor core in the radial direction of the rotor core; and the first magnet and the first pole pitch line having a first minimum distance therebetween, the second magnet and the second pole pitch line having a second minimum distance therebetween, the first minimum distance being smaller than the second minimum distance, wherein no magnets are provided between the first pole pitch line and the second pole pitch line in a circumferential direction of the rotor core other than the first magnet and the second magnet.