Patent ID: 8436569

Claim:
A multiphase inductance-changing and pole-changing electric machine operable at above rated parameters comprising: a stator having a plurality of phase belts, wherein each phase belt comprises two or more coils, and wherein each of the two or more coils in a phase belt are initially connected in series; a rotor driven by currents in the stator; and a control system connected to the plurality of phase belts and configured to: (a) apply an alternating current to the plurality of phase belts at a first time and at a frequency equal to a first frequency, wherein the first frequency is below a rated frequency; (b) increase the frequency to a second frequency during a time period spanning the first time and a second time; (c) decrease a number of poles at a third time; and (d) increase the frequency to a third frequency during a time period spanning a fourth time and a fifth time.