System, device, and method for controlling a power inverter
AssigneeBroadcom Corporation
InventorsMarius Ionel VLADAN, Steve HOSTE, Jean-Francois KOLECK
Life of this patent
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Abstract
A wireless power transmitter includes circuitry configured to determine a reflected impedance from a receiver coil at a transmitter coil and control a dead-time of one or more switching stages of a power conversion device based on the reflected impedance. A tunable matching network at the transmitter is controlled based on the reflected impedance and the dead-time of the one or more switching stages.
Claims20
A device comprising:
- circuitry configured to
- determine a load impedance for at least one power conversion device,
- control a dead-time of one or more switching stages of the at least one power conversion device based on the load impedance, and
- control a tunable matching network based on the load impedance and the dead-time of the one or more switching stages.
device of claim 9, wherein the circuitry is further configured to control the dead-time between the first switch and the second switch within a predetermined dead-time range having an upper dead-time threshold and a lower dead-time threshold.
The device of claim 15, wherein the circuitry is further configured to modify an impedance of the tunable matching network in response to determining that a first value of a first accumulator is greater than zero and the dead-time between the first switch and the second switch is greater than or equal to the upper dead-time threshold.
A method comprising:
- determining a reflected impedance from a receiver coil at a coil of a wireless power transmitter;
- controlling a dead-time of one or more switching stages of at least one power conversion device of the wireless power transmitter based on the reflected impedance;
- and
- controlling an impedance of a tunable matching network based on the reflected impedance and the dead-time of the one or more switching stages.
A wireless power transmitter comprising:
- circuitry configured to
- determine a reflected impedance from a receiver coil at a transmitter coil,
- control a dead-time of one or more switching stages of a power conversion device based on the reflected impedance, and
- control a tunable impedance of a matching network at the transmitter based on the reflected impedance and the dead-time of the one or more switching stages.
Dependencies are inferred from the claim text.