The homopolar axial flux hub stepper motor is constructed to be used as an inwheel motor for electric vehicles or as a direct drive motor in rotary systems. The homopolar motor in particular comprises of concentric disc type toothed stator and rotor ring sections, torroidal bipolar copper windings wound around the stator rings and stationary permanent magnets. Stationary permanent magnets are attached radially in-between the concentric stator rings to provide a unidirectional field flux in the rotor rings. The flat cylindrical shaped stator rings with very less stator core mass and the rotor rings which are devoid of any windings or magnets makes the homopolar motor a light weight machine. This disc type machine with stationary permanent magnets can produce high torque directly at low speed and works without the need for rotor position sensing.
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