Patent ID: 8405249

Claim:
A multi-voltage power supply comprising: a control module having a display and a processor, the display and processor presenting an airplane type or class selection menu to airplane support technicians and responding to the selection of a type or class of airplane by generating a power output selection signal designating the type of power needed by the selected type or class of airplane; a power supply module receiving the power output selection signal and having an A.C. power input, at least one A.C. power output and at least one D.C. power output; a sine wave synthesizer within said power supply module having a D.C. power input, a synthesized A.C. power output, and having as input one or more sine wave synthesizing control signals; a first connection between the power supply module's A.C. power input and the synthesizer's D.C. power input, said first connection comprising a first rectifier; a second connection between the synthesizer's A.C. power output and the power supply module's A.C. power output; a third connection between the synthesizer's A.C. power output and the power supply module's D.C. power output, said third connection comprising a second rectifier; and a control system receiving measurements of voltages at the power supply module's power output and also receiving the power output selection signal, the control system generating the one or more sine wave synthesizing control signals to maintain a predetermined A.C. or D.C. preset voltage level at the power supply module's A.C. or D.C. power output in response to the power output selection signal.