Detuning for a resonant wireless power transfer system including cooperative power sharing
AssigneeMassachusetts Institute of Technology
InventorsAnantha P. Chandrakasan, Nachiket V. Desai, Chiraag Juvekar
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Abstract
Wireless resonant inductive power receivers for achieving detuning for a resonant wireless power transfer system including cooperative power sharing is described. Cooperative power sharing allows for detuning one or more wireless received coupled to a wireless charger to alter the power received at each wireless receiver
Claims38
A wireless resonant inductive power receiver for cooperative power sharing between two or more wireless resonant inductive power receivers coupled to a wireless resonant power charger, the wireless resonant inductive power receiver comprising:
- a first inductive element resonating at a frequency;
- and
- a second inductive element wirelessly coupled to the second inductive element.
A wireless resonant inductive power receiver for cooperative power sharing between two or more wireless resonant inductive power receivers coupled to a wireless resonant power charger, comprising:
- a main inductive coil resonating at a frequency and wirelessly coupled to an auxiliary inductive coil;
- an auxiliary rectifier coupled to the auxiliary inductive coil, wherein the resonant frequency of the main inductive coil is based upon a duty cycle of the auxiliary rectifier;
- and
- a detuning engine configured to control the duty cycle of the auxiliary rectifier.
The wireless resonant inductive power receiver of claim 119, wherein the detuning engine is further configured to adjust the duty cycle of the auxiliary rectifier based upon the detected second wireless resonant inductive power receiver.
A method for detuning a wireless resonant inductive power receiver comprising:
- determining a desired duty cycle;
- and
- adjusting a resonant frequency of a main inductive element of a wireless receiver,
- wherein adjusting the resonant frequency of the main inductive element comprises adjusting an impedance presented to an auxiliary inductive element of the wireless receiver based upon the determined, desired duty cycle.
A wireless resonant inductive power receiver coupled to a wireless resonant power charger, the wireless resonant inductive power receiver comprising:
- a main inductive element resonating at a frequency;
- and
- an auxiliary rectifier, wherein the resonant frequency of the main inductive element is based upon an impedance of the auxiliary rectifier.
Dependencies are inferred from the claim text.