Patent ID: 7092267

Claim:
A power supply that generates alternating current (AC) and direct current (DC) from a DC voltage source, comprising: an inverter that supplies a first phase current and a second phase current to a traction motor, wherein said inverter comprises: a first phase half bridQe connected across said DC voltage source to provide said first phase current; a second phase half bridge connected across said DC voltage source to provide said first phase current; a third chase half bridge connected across said DC voltage source to provide a third phase current to said traction motor; a first auxiliary half bridge connected across said DC voltage source to provide a first auxiliary current; and a second auxiliary half bridge connected across said DC voltage source to provide a second auxiliary current; and a controller that determines a first adjusted phase current based on said first phase current, determines a second adjusted phase current based on said second phase current, calculates an available current based on said first and second adjusted phase currents and generates a voltage control signal based on said available current, wherein said controller controls said inverter based on said voltage control signal.