Wireless power control system

• Main Authors: Schwannecke, Joshua K, Kuyvenhoven, Neil W, Moore, Colin J, Taylor, Joshua B, Lord, John James, Norconk, Matthew J, Baarman, David W, Blood, Kristen J, Moes, Benjamin C
• Format: Patent
• Language: English
• Published: 22.01.2019
• Subjects: BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTING RESONANT CIRCUITS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSFORMERS; TRANSMISSION; TUNING RESONANT CIRCUITS

A wireless power transfer component with a selectively adjustable resonator circuit having a Q control subcircuit that varies the Q factor of the resonator circuit to control the amount of power relayed by the resonator circuit. The resonator circuit may be in the wireless power supply, the wireless power receiver, an intermediate resonator or any combination thereof. The resonator circuit may be actively configured based on a feedback circuit. The feedback circuit may sense a characteristic in the secondary circuit or elsewhere and actively operate the control subcircuit based on the sensed characteristic. The feedback circuit may cause the Q control subcircuit to change (reduce or increase) the Q factor when the sensed characteristic crosses a threshold value. The Q control subcircuit may include a variable resistor having a value that can be varied to adjust the Q factor of the resonator circuit.