Patent ID: 8436507

Claim:
An adjustable axial-flux disc motor, comprising: a stator, having a coil and a ring-shaped conductor; and a rotator, having a permanent magnet, a conductive element, at least one soft magnetic material and a pair of electric brushes; wherein, the coil is wrapped on the stator; the stator is disposed spaced from the permanent magnet by an air gap while the permanent magnet is disposed on the rotator; the conductive element is composed of a top layer and a bottom layer and is disposed next to the permanent magnet for surrounding the same while enabling the at least one soft magnetic material to be filled in a gap sandwiched between the two layer; the pair of electric brushes of the rotator is arranged engaging with the ring-shaped conductor while the ring-shaped conductor is fixedly disposed on the stator; and thereby, by the magnetic field resulting from the passing of current through the conductive element, the axial flux of the permanent magnet is increased and thus the torque of the motor is increased and the demagnetization of the permanent magnet is prevented.