Abstract: An electromagnetic induction machine having inductively coupled primary, secondary and tertiary branch windings. The exciting current of the primary branch is transformed or reflected, via the inductive coupling, to an electrically separate secondary or tertiary branch. This reflected current in the isolated branch is sustained by connecting a capacitive load impedance to it. Thus, a floating parallel resonant circuit is formed which supplies the needed reactive component in lieu of the primary branch. Different winding techniques are then incorporated in the separate branches to maximize the available winding space and provide improved operating or performance characteristics.

Abstract: An induction motor includes a stator having at least one pair of stator windings and a rotor with rotor windings which are magnetically coupled to the stator windings via a circumferential air gap. The rotor windings are connected together in a squirrel cage or a wound rotor configuration. The stator windings are connected in series across the source. A capacitor is connected in parallel with one of the stator windings and this combination is connected in series with the other stator winding and is sized to form a quasi-double-resonant circuit, i.e., a quasi-parallel resonant circuit with the one winding and a quasi-series resonant circuit with the other winding. The stator windings are then grouped to form definite polar areas in the stator and a balanced rotating magnetic field is produced by all the windings throughout the entire load range when the motor is connected to a power source.