Patent ID: 7830686

Claim:
A system for providing electrical power comprising: at least a first and a second converter, each having a switch, a first pair of terminals, and a second pair of terminals, wherein: a first terminal of said first pair of terminals of each of said at least a first and a second converter being connected to each other in parallel, a second terminal of said first pair of terminals of each of said at least a first and a second converter being connected to each other in parallel, a first terminal of said second pair of terminals of each of said at least a first and a second converter being connected to each other in parallel, and a second terminal of said second pair of terminals of each of said at least a first and a second converter being connected to each other in parallel; a phase-shift pulse width modulation controller connected to each of said switches, said phase-shift pulse width modulation controller generating a control signal including a series of pulses that cause said switches to turn on and off; and said series of pulses being timed such that said pulses controlling switches in different ones of said at least a first and a second converters are out of phase with each other, wherein each switch of the converters is not in a conduction state at the same time, and wherein the pulse width modulation signals are phase-shift pulse width modulation signals having a phase-shift time described by the equation T ph =1 /N 1 /f s , wherein N is the number of converters in parallel and f s is the switching frequency.