Patent ID: 7956505

Claim:
A rotor of an electric motor, comprising: a lamination core formed by laminating a plurality of individual cores; and at least one pair of magnet members that generate rotating torque by electromagnetic interaction with a stator, wherein: the magnet members are coupled to the lamination core at positions which allow a magnetic sensor to sense magnetic flux generated by the magnet members, the magnetic members are arranged to have magnetic poles opposite to each other, the rotor rotates by electromagnetic interaction with the stator and a position of the rotor is detected based on the magnetic flux generated by the magnet members as sensed by the magnetic sensor, a plurality of flux barrier portions coupled to and arranged in a circumferential direction of the lamination core, the plurality of flux barrier portions opposing each other, the magnet members are individually coupled to respective ones of the flux barriers, such that the magnetic poles of the magnet members alternate with each other in the circumferential direction, and each magnet member has a protruding portion that is directly coupled to the lamination core, and each magnet member has a first end that contacts or extends through one or more individual cores of the lamination core and a second end including the protruding portion that protrudes from the lamination core in a direction adjacent to the magnetic sensor, each magnet member extending continuously from the first end to the second end.