Patent ID: 9537379
Date: 2017-01-03
CPC Classifications: H02K

Claim:
1. A motor comprising: a stator; a rotor including a plurality of rotor cores including at least one metal material and arranged inside the stator so as to be spaced apart from one another in a circumferential direction, and a plurality of permanent magnets placed between the respective two neighboring rotor cores of the plurality of rotor cores, the permanent magnets extending radially about the center of the stator, the rotor being rotatably placed inside the stator; and a magnetic flux adjustment unit including a ring-shaped main frame, a plurality of magnetic substance portions extending from the main frame and spaced apart from one another in a circumferential direction of the rotor, and non-magnetic regions defined between the plurality of magnetic substance portions, wherein the magnetic flux adjustment unit is rotatable between a first position where each of the plurality of magnetic substance portions is located in a space between respective neighboring rotor cores of the plurality of rotor cores such that each of the plurality of magnetic substance portions overlaps a portion of the respective neighboring rotor cores and each of the plurality of magnetic substance portions corresponds to a single permanent magnet, and a second position where each of the plurality of non-magnetic regions is located in a space between respective permanent magnets among the plurality of permanent magnets such that each of the plurality of non-magnetic regions overlaps a portion of the respective permanent magnets and each of the plurality of non-magnetic regions corresponds to a single rotor core, and the plurality of magnetic substance portions of the magnetic flux adjustment unit radially protrudes outward of the main frame.