Patent ID: 8093754

Claim:
A method for compensating for the reduced power output of one or more power sources within a stage of electrical power, the method comprising: detecting a reduced power output of one or more power sources within a stage of electrical power among two or more stages of electrical power connected in series, wherein the two or more stages of electrical power comprise a plurality of power sources, each power source electrically connected to a pulse amplitude modulated current converter (“converter”), each of the converters receiving direct electrical current from their respective power source and providing pulse amplitude modulated current pulses at an output terminal of the converter, the output terminal of each converter electrically connected in parallel with the output terminals of all of the other converters in the stage and wherein the current pulses of at least two converters are out of phase with respect to each other, thereby summing the current pulses of all of the converters forming a signal modulated onto the pulse output of the converters that is demodulated; and decreasing the value of the current output of the one or more reduced output power sources to maintain the value of voltage from the one or more reduced output power sources equal to the value of voltage of the remaining power sources comprising the stage.