Method and system for wireless energy harvesting and power management using piezoelectric components
AssigneeUnited Arab Emirates University
InventorsMahmoud F. Y. Al Ahmad, Abdulrahman Dahir Saeed Mohamed
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Abstract
The present invention relates to a radio frequency energy harvester module. The harvester module receives an AC input voltage from a wireless power source, rectifies it into a DC voltage, and uses a piezoelectric transformer to convert this voltage into a transformed AC signal, which is subsequently rectified to generate a stable DC output. The system includes an oscillator to generate excitation or oscillation signals, matched to the resonance frequency of the piezoelectric transformer. The method includes steps for converting wireless power into usable DC output using rectification, piezoelectric transformation, and feedback-based optimization.
Claims7
A radio frequency energy harvester module comprising:
- a first rectifying circuit operable to receive an AC input voltage and to generate a biasing signal from the received AC input voltage;
- an oscillator operable to generate an oscillation signal from the biasing signal generated by the first rectifying circuit;
- a piezoelectric transformer operable to generate a transformed AC voltage from the oscillation signal generated by the oscillator;
- a second rectifying circuit operable to generate a DC output voltage from the transformed AC voltage generated by the piezoelectric transformer;
- and
- a power management circuit electrically coupling the second rectifying circuit to the oscillator, the power management circuit being configured to generate, from the DC output voltage, a second biasing signal received by the oscillator in a feedback loop.
A method for power conversion using an oscillator, the method comprising:
- receiving an AC input voltage generated from a wireless power electromagnetic signal;
- rectifying the AC input voltage to produce a biasing signal;
- converting the biasing signal to an oscillation signal using the oscillator;
- generating, from the oscillation signal, a transformed AC voltage using a piezoelectric transformer;
- rectifying the transformed AC voltage to produce a DC output voltage;
- and
- generating, from the DC output voltage, a second biasing signal received by the oscillator in a feedback loop using a power management circuit.
Dependencies are inferred from the claim text.