Wireless Power Receiver Initialization Protocol
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Solution Overview
Problem
Current wireless power transfer systems face challenges in efficiently and reliably initiating power transfer operations, often resulting in delays and suboptimal performance due to varying system parameters and loads, and the need for improved flexibility, reduced complexity, and safer operation.
Innovation Solution
A method involving a power receiver requesting a transition to a power transfer phase by transmitting initial and secondary requests, with the power transmitter performing measurements and generating a power transfer signal based on these measurements to optimize the initialization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is implemented, then convenience and ease of operation are improved, but exposure to electromagnetic fields and potential harmful effects increase
Solution Approach 1:
A power transfer box is introduced as an intermediary device between the power source and the device needing power. This box contains shielding structures that block electromagnetic fields while allowing wireless power transfer through designated pathways, thus mediating between the convenience of wireless power and the need to reduce electromagnetic exposure.
Solution Approach 2:
The system is divided into separate functional components: a power transfer box containing shielding elements, a power source, and a receiving device. The shielding structure is segmented into multiple panels that can be independently positioned and adjusted to optimize both power transfer efficiency and electromagnetic field blocking.
2Object-affected harmful factors
If shielding structures are added to block electromagnetic fields, then harmful effects are reduced, but device complexity increases
Solution Approach 1:
The power transfer box serves multiple functions simultaneously: it shields against electromagnetic fields, facilitates wireless power transfer, and provides a housing for the power source. The shielding panels are designed to be both protective and structurally integrated, reducing the need for additional separate components.
Solution Approach 2:
The shielding structure is merged with the housing of the power transfer box, combining the protective function with the structural framework. The shielding panels are integrated into the box walls, eliminating the need for separate shielding attachments and reducing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables faster, safer, and more reliable initialization of power transfer, aligning the initial operating point closer to the desired operating point, reducing complexity, and enhancing system flexibility.
Implementation Method 1
Wireless power transfer systems have been developed that utilize electromagnetic induction or resonance to transfer power wirelessly over short distances
Implementation Method 2
The mobile device includes a magnetic resonance system with a resonant frequency substantially the same as the resonant frequency of the base, enabling efficient wireless power transfer through synchronized electromagnetic oscillation
Data Source
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AI summary
A power receiver for a wireless power transmitter transmits (703) a request for a power transfer phase while the power receiver is in a load state where a load is disconnected from the power receive coil (107). When receiving (705) the request, the power transmitter proceeds to measure (707) a power transfer parameter after which an acknowledgement is transmitted to (709) and received by (711) the power receiver (105). In response, it proceeds to change (713) to a new load state where the load is connected to the power receive coil (107). It transmits (715) a second request which when received (717) causes the power transmitter (101) to perform another measurement (719) of a power transfer parameter. Power transfer is then started (721) in dependence on the measurement results. An improved initialization of a power transfer phase may be provided.