A motor comprising: a stator a rotor including a plurality of rotor cores arranged inside the stator spaced apart from one another in a circumferential direction, and a plurality of permanent magnets placed between 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 (100a, 100b, 100c, 100d) including a ring-shaped main frame (110a, 110b, 110c, 110d), a plurality of magnetic substance portions (120a, 120b, 120c, 120d) extending from the main frame (110a, 110b, 110c, 110d) and spaced apart from one another in a circumferential direction of the rotor, and non-magnetic regions (130a, 130b, 130c, 130d) defined between the plurality of magnetic substance portions (120a, 120b, 120c, 120d), wherein the magnetic flux adjustment unit (100a, 100b, 100c, 100d) is rotatable between a first position where each of the plurality of magnetic substance portions (120a, 120b, 120c, 120d) is located in a space between the respective neighboring rotor cores of the plurality of rotor cores such that each of the plurality of magnetic substance portions overlap a portion of the respective neighboring rotor cores and each of the plurality of magnetic substance portions correspond to a single permanent magnet, and a second position where each of the plurality of non-magnetic regions (130a, 130b, 130c, 130d) is located in a space between the respective permanent magnets among the plurality of permanent magnets such that each of the plurality of non-magnetic regions overlap a portion of the respective permanent magnets. a stator a rotor including a plurality of rotor cores arranged inside the stator spaced apart from one another in a circumferential direction, and a plurality of permanent magnets placed between 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 (100a, 100b, 100c, 100d) including a ring-shaped main frame (110a, 110b, 110c, 110d), a plurality of magnetic substance portions (120a, 120b, 120c, 120d) extending from the main frame (110a, 110b, 110c, 110d) and spaced apart from one another in a circumferential direction of the rotor, and non-magnetic regions (130a, 130b, 130c, 130d) defined between the plurality of magnetic substance portions (120a, 120b, 120c, 120d), wherein the magnetic flux adjustment unit (100a, 100b, 100c, 100d) is rotatable between a first position where each of the plurality of magnetic substance portions (120a, 120b, 120c, 120d) is located in a space between the respective neighboring rotor cores of the plurality of rotor cores such that each of the plurality of magnetic substance portions overlap a portion of the respective neighboring rotor cores and each of the plurality of magnetic substance portions correspond to a single permanent magnet, and a second position where each of the plurality of non-magnetic regions (130a, 130b, 130c, 130d) is located in a space between the respective permanent magnets among the plurality of permanent magnets such that each of the plurality of non-magnetic regions overlap a portion of the respective permanent magnets.