Electricity: power supply or regulation systems – Input level responsive
Patent
1993-07-12
1994-07-05
Stephan, Steven L.
Electricity: power supply or regulation systems
Input level responsive
323906, 136293, G05F 500
Patent
active
053270711
ABSTRACT:
A method and an apparatus for efficiently controlling the power output of a solar cell array string or a plurality of solar cell array strings to achieve a maximum amount of output power from the strings under varying conditions of use. Maximum power output from a solar array string is achieved through control of a pulse width modulated DC/DC buck converter which transfers power from a solar array to a load or battery bus. The input voltage from the solar array to the converter is controlled by a pulse width modulation duty cycle, which in turn is controlled by a differential signal comparing the array voltage with a control voltage from a controller. By periodically adjusting the control voltage up or down by a small amount and comparing the power on the load or bus with that generated at different voltage values a maximum power output voltage may be obtained. The system is totally modular and additional solar array strings may be added to the system simply be adding converter boards to the system and changing some constants in the controller's control routines.
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Frederick Martin E.
Jermakian Joel B.
Berhane Adolf D.
Clohan, Jr. Paul S.
Marchant R. Dennis
Miller Guy M.
Stephan Steven L.
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