Energy harvesting apparatus and method for rapidly tracking a maximum power point
AssigneeKorea University Research and Business Foundation
InventorsChul Woo Kim, Min Seob Shim, Jun Won Jung, Jung Moon Kim
Life of this patent
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Abstract
Disclosed is an energy harvesting apparatus. The energy harvesting apparatus includes a rectifier for rectifying an alternating current (AC) voltage supplied from an energy source into a direct current (DC) voltage, a charging unit for storing an output voltage of the rectifier, and a maximum power point tracker selectively connected between the rectifier and the charging unit, for differentiating the output voltage of the rectifier in a first connection state, and for controlling the output voltage of the rectifier based on a differentiation result.
Claims3
An energy harvesting apparatus comprising:
- a rectifier rectifying an alternating current (AC) voltage supplied from an energy source into a direct current (DC) voltage;
- a charging unit storing an output voltage of the rectifier;
- a maximum power point tracker selectively connected between the rectifier and the charging unit, for differentiating the output voltage of the rectifier in a first connection state, and for controlling the output voltage of the rectifier based on the differentiation result of the output voltage of the rectifier,
- wherein the maximum power point tracker comprises:
- a first capacitor connected to an output node of the rectifier;
- a voltage controller selectively connected to the first capacitor, for differentiating a voltage of the first capacitor, for detecting a maximum power point based on the differentiation result of the first capacitor, and for outputting a control signal corresponding to a detection result;
- and
- a charge sharer storing a voltage of the output node of the rectifier based on the control signal and distributing the stored voltage as a maximum power point voltage;
- a charging controller comparing the output voltage of the rectifier and the maximum power point voltage and controlling an operation of the charging unit based on a comparison result;
- and
- a voltage multiplexer (MUX) supplying power to the charging controller, wherein the voltage multiplexer (MUX) comprises an S-R latch and a rising edge detector and prevents delay of output of the voltage multiplexer (MUX).
Dependencies are inferred from the claim text.