Patent ID: 7880424

Claim:
A rotary electric apparatus comprising: a synchronous machine having a stator with multiphase armature windings wound therein and a rotor with a field winding wound therein and rotatable around the stator; an inverter that produces armature currents as AC (alternating current) power from DC (direct current) power and supplies the armature currents to the armature windings; a DC power supply that outputs first voltage of a first voltage value and second voltage of a second voltage value higher than the first voltage value, the first and second voltages being the DC power; a current flow regulator that regulates directions of currents induced through the field winding by the rotor exciting currents into one way, the current flow regulator being electrically connected to the field winding; and a controller that controls the inverter such that the inverter produces the armature currents consisting of synchronized currents producing rotating fields depending on a rotating position of the rotor and rotor exciting currents different in waveforms from the synchronized currents and superposed on the synchronized currents, at least the rotor exciting currents being powered by the second voltage.