Patent ID: 11949229
Assignee: RENESAS ELECTRONICS AMERICA INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A wireless power transmitter for wireless power transfer (WPT), the transmitter comprising:
an input for receiving a WPT input signal;
an output for connection to a transmit coil;
a transmit circuit for converting the WPT input signal to a WPT output signal in the transmit coil, the transmit circuit comprising a processor and also comprising an inverter for generating the WPT output signal from the WPT input signal under control of the processor;
wherein the transmit circuit is configured to:
determine that the WPT output signal power is to be increased such that increasing the WPT output signal power comprises increasing a voltage amplitude of the WPT output signal; and
in response to the determining, coordinate an increase of the voltage amplitude of the WPT output signal with a change of the WPT output signal frequency to increase the voltage amplitude of the WPT output signal while operating the inverter to move the WPT output signal frequency away from a resonant frequency of a resonant tank comprising the transmit coil.