Multi-phase wound rotor resolver apparatus

A multi-phase wound-rotor (WR) resolver apparatus for measuring a displacement position of a circular movement body, the multi-phase WR resolver apparatus comprising:

• a stator including:
• an N number of coils placed and wound independently of one another at N equally divided positions over a mechanical or an electrical period of the stator, N being an odd number greater than or equal to 5,
• wherein the N number of coils have an identical electrical polarity, are each wound with an equal number of winding turns, and sense a displacement of the rotor;
• and
• a wound-rotor, wherein a coil is wound with a sinusoidally distributed winding, a driving signal carrier is applied to the coil wound on the wound-rotor, and one or more periods of sinusoidal electrical signals are induced on each of the N number of coils on the stator per one turn of the wound-rotor such that N sequentially phase-delayed and amplitude-modulated displacement signals are sensed from the N number of coils on the stator.