Abstract: An electric motor apparatus comprising a rotor component rotating with respect to a stator component. A rotational position indicator generates rotational position information indicative of a relative orientation of the rotor and stator components. A rotor winding control unit is fixedly mounted on the rotor component and is coupled to a rotor supply voltage supplied to the rotor component. The rotor control unit generates a rotor waveform in dependence on the rotational position information and applies the rotor waveform to a rotor winding arrangement. A stator winding waveform generator generates a stator waveform in dependence on the rotational position information and applies the stator waveform to a stator winding arrangement. The rotor waveform and stator waveform are generated in synchronization with the relative orientation of the rotor and stator components in order to synchronize mutual interactions of the rotor winding arrangement and the stator winding arrangement with the relative orientation.