Power receiving device and method for estimating received power
The power receiving device with a sub-rectifier circuit addresses power loss issues in wireless power transmission by measuring the sub-rectifier's output to estimate received power, simplifying the circuit and reducing power consumption.
Patent Information
- Application Number
- JP2024502794
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2022-02-25
- Filing Date
- 2022-07-14
- Publication Date
- 2026-05-19
- Estimated Expiration
- 2042-07-14
AI Technical Summary
Conventional methods for measuring received power in wireless power transmission systems suffer from significant power loss due to the need for separate measurement of voltage and current, and the installation of current sensing resistors affects the output power, complicating the circuit and increasing DC power loss.
A power receiving device with a sub-rectifier circuit connected in parallel to the main rectifier circuit, where the sub-rectifier's input impedance is greater than the main rectifier's, allowing power estimation by measuring the output of the sub-rectifier circuit, thereby reducing power loss and simplifying the circuit design.
The method reduces power loss and simplifies the circuit configuration by eliminating the need for separate power measurement elements, enabling miniaturization and cost reduction while maintaining efficient power reception.