Apparatus for regulating the delivery of power from a DC power source to an active or passive load
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United States of America Patent
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Feb 10, 2004
Grant Date -
Jun 26, 2003
app pub date -
Dec 26, 2001
filing date -
Dec 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for regulating the delivery of power from a DC power source (for example, a solar array) to a load by dynamically and accurately tracking the maximum power point ('MPP') of the source includes a switch mode DC--DC power supply ('SMPS'), a voltage sensor operatively connected to the output of the power supply, a current sensor operatively connected to the output of the power supply, and a controller for providing a pulse width modulation (PWM) signal to the power supply. The load may be a battery or, if not a battery either a relatively low impedance load or a relatively high impedance load. The PWM signal has a controllable pulse width or PWM on-time. Depending upon sensed load characteristics, the apparatus utilizes measured signals from the voltage sensor or from the current sensor to achieve MPP tracking.
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