METHODS, CIRCUITS AND ARTICLES OF MANUFACTURE FOR CONTROLLING WIRELESS POWER TRANSFER RESPONSIVE TO CONTROLLER CIRCUIT STATES
First Claim
1. A method of operating a wireless power transfer circuit comprising an input port configured to couple to a power source, an ac excitation circuit having a port coupled to the input port, a resonant circuit coupled to the ac excitation circuit, and a controller circuit configured to operate the ac excitation circuit, the method comprising:
- inductively transferring power from the resonant circuit; and
changing an operating frequency of the ac excitation circuit and a configuration of the resonant circuit responsive a change in indicated efficiency of the wireless power transfer.
2 Assignments
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Accused Products
Abstract
A wireless power transfer circuit can include an input port that can be configured to couple to a power source, an ac excitation circuit having a port coupled to the input port, a resonant circuit coupled to the ac excitation circuit, and a controller circuit that can be configured to operate the ac excitation circuit. The wireless power transfer circuit can operate to inductively transfer power from the resonant circuit and the controller circuit can be configured to change an operating frequency of the ac excitation circuit and change a configuration of the resonant circuit responsive a change in indicated efficiency of the wireless power transfer.
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Citations
24 Claims
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1. A method of operating a wireless power transfer circuit comprising an input port configured to couple to a power source, an ac excitation circuit having a port coupled to the input port, a resonant circuit coupled to the ac excitation circuit, and a controller circuit configured to operate the ac excitation circuit, the method comprising:
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inductively transferring power from the resonant circuit; and changing an operating frequency of the ac excitation circuit and a configuration of the resonant circuit responsive a change in indicated efficiency of the wireless power transfer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless power transfer apparatus comprising:
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an input port configured to couple to a power source; an ac excitation circuit coupled to the input port, the ac excitation circuit configured to operate responsive to a control signal indicating an operating frequency for the ac excitation circuit to convert power from the power source to ac excitation; a resonant circuit coupled to the ac excitation circuit, the resonant circuit configured to operate responsive to a resonant circuit configuration selection control signal to inductively transfer the ac excitation from the resonant circuit; and a controller circuit, coupled to the ac excitation circuit and to the resonant circuit, the controller circuit configured to change the operating frequency for the ac excitation circuit using the control signal and configured to change a configuration of the resonant circuit using the resonant circuit configuration selection control signal responsive a change in an indicated efficiency of the wireless power transfer relative to a specified efficiency of the wireless power transfer. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of operating a wireless power transfer circuit comprising an input port configured to couple to a power source, a ac excitation circuit having a port coupled to the input port, a resonant circuit coupled to the ac excitation circuit, and a controller circuit configured to operate the ac excitation circuit, the method comprising:
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operating the controller circuit in a first operating state including providing a first operating frequency to the ac excitation circuit and selecting a first configuration for the resonant circuit; inductively transferring power from the resonant circuit to an external device using the first operating state; transitioning operation of the controller circuit to a second operating state including providing a second operating frequency to the ac excitation circuit and selecting a second configuration for the resonant circuit responsive to a change in an operational parameter of the controller circuit to meet a predetermined operating criteria of the wireless power transfer circuit; and inductively transferring power from the resonant circuit to the external device using the second operating state.
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Specification