Wireless power receiver system circuit
AssigneeNuCurrent, Inc.
InventorsAlberto Peralta, Pavel Shostak
Life of this patent
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Abstract
Wireless power transfer systems, disclosed, include one or more circuits to facilitate high power transfer at high frequencies. Such wireless power transfer systems may include a damping circuit, configured to dampen a wireless power signal such that communications fidelity is upheld at high power. Additionally or alternatively, such wireless power transfer systems may include voltage isolation circuits, to isolate components of the wireless receiver systems from high voltage signals intended for a load associated with the receiver. Utilizing such systems enables wireless power transfer at high frequency, such as 13.56 MHz, at voltages over 1 Watt, while maintaining fidelity of in-band communications associated with the higher power wireless power signal.
Claims14
A wireless power receiver system circuit comprising:
- a receiver antenna operable to (i) couple with a transmitter antenna via an alternating electromagnetic field, wherein the alternating electromagnetic field is operable to deliver power and in-band data to the wireless power receiver system circuit and (ii) produce an alternating current (“AC”) power signal based on the alternating electromagnetic field;
- a power conditioning system operable to (i) receive the AC power signal, (ii) convert the AC power signal to a DC power signal, and (iii) provide the DC power signal to, at least, a load associated with the wireless power receiver system circuit;
- a receiver control system;
- a controller capacitor electrically connected in series with a data input of the receiver control system;
- and
- a voltage isolation circuit comprising:
- a first isolation capacitor electrically connected to the receiver antenna and operable to receive the AC power signal;
- and
- a second isolation capacitor electrically connected in series with respect to the first isolation capacitor and operable to provide the AC power signal to the power conditioning system, wherein the voltage isolation circuit is electrically connected to the controller capacitor at a node between the first isolation capacitor and the second isolation capacitor, and
- wherein the controller capacitor is operable to:
- receive the AC power signal from the voltage isolation circuit, the AC power signal having a range of voltages and including the in-band data;
- regulate the AC power signal to generate a scaled AC power signal having a reduced range of voltages while maintaining the in-band data;
- provide the in-band data, in-band of the scaled AC power signal, to the data input of the receiver control system via the controller capacitor;
- and
- isolate the reduced range of voltages of the scaled AC power signal at the receiver control system from a load voltage at the load associated with the wireless power receiver system circuit.
A method for operating a wireless power receiver system circuit, the wireless power receiver system circuit comprising (i) a receiver antenna, (ii) a power conditioning system, (iii) a receiver control system, (iv) a controller capacitor electrically connected in series with a data input of the receiver control system, and a voltage isolation circuit comprising (a) a first isolation capacitor electrically connected to the receiver antenna and (b) a second isolation capacitor electrically connected in series with respect to the first isolation capacitor, wherein the voltage isolation circuit is electrically connected to a controller capacitor at a node between the first isolation capacitor and the second isolation capacitor, the method comprising:
- coupling the receiver antenna with a transmitter antenna, via an alternating electromagnetic field that is (i) generated by the transmitter antenna and (ii) operable to deliver power and in-band data to the wireless power receiver system circuit;
- producing, using the receiver antenna, an alternating current (“AC”) power signal based on the alternating electromagnetic field, the AC power signal configured to deliver the power and in-band data;
- receiving, at the voltage isolation circuit, the AC power signal from the receiver antenna, the AC power signal having a range of voltages and in-band data;
- receiving, at the power conditioning system via the second isolation capacitor, the AC power signal;
- converting, via the power conditioning system, the AC power signal to a direct current (“DC”) power signal;
- providing, via the power conditioning system, a DC power signal to, at least, a load associated with the wireless power receiver system circuit;
- receiving, via the controller capacitor, the AC power signal;
- regulating the AC power signal by the controller capacitor to generate a scaled AC power signal having a reduced range of voltages while maintaining the in-band data;
- providing the in-band data, which is in-band of the scaled AC power signal, to a data input of a receiver controller via the controller capacitor, the controller capacitor further electrically connected in series with the data input of the receiver controller;
- and
- isolating the reduced range of voltages of the scaled AC power signal at the receiver controller from a load voltage at the load associated with the wireless power receiver system circuit.
Dependencies are inferred from the claim text.