Patent ID: 11942792
Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for operating a wireless charging transmitter, the method comprising:
setting, by the wireless charging transmitter, a full bridge inverter of the wireless charging transmitter to a half bridge inverter mode, wherein transmitted power of the wireless charging transmitter is controlled using an operating point comprising at least one of an alternating current (AC) frequency of the full bridge inverter, an AC duty cycle of the full bridge inverter, an AC phase shift of the full bridge inverter, or an input voltage of the wireless charging transmitter;
increasing, by the wireless charging transmitter, a load of a wireless charging receiver paired to the wireless charging transmitter until a power transfer of the wireless charging transmitter meets a specified threshold; and
saving, by the wireless charging transmitter,
the operating point of the wireless charging transmitter as a higher induced voltage operating point associated with the half bridge inverter mode, and
an induced rectifier voltage of the wireless charging receiver as a target rectifier voltage, the higher induced voltage operating point being selected to dampen a change in the induced rectifier voltage of the wireless charging receiver while switching the full bridge inverter to the half bridge inverter mode; and

dampening the change in the induced rectifier voltage of the wireless charging receiver while switching the full bridge inverter from a full bridge inverter mode to the half bridge inverter mode by setting the operating point of the wireless charging transmitter to the higher induced voltage operating point.