Motor, brushless exciter system and a mobility device including the same

A brushless exciter system, comprising:

• a first inverter configured to convert a direct current (DC) into an alternating current (AC) and output a first alternating current (AC);
• a primary coil configured to receive the first alternating current (AC) from the first inverter;
• and
• a secondary coil magnetically coupled to the primary coil and electrically connected to a rotor of a motor.

A mobility device, comprising:

• a body;
• at least one of a wheel or a propeller provided in the body;
• a battery provided in the body;
• and
• a motor connected to the battery and configured to provide driving force to the at least one of the wheel or the propeller,
• wherein the motor comprises
• a stator configured to output magnetic flux,
• a rotor configured to output magnetic flux to be rotated by the magnetic flux of the stator,
• a secondary coil disposed to be rotated by the rotation of the rotor,
• a rectifier configured to rectify a current of the secondary coil and output the rectified current to the rotor, and
• a primary coil disposed to be magnetically coupled to the secondary coil.