Bidirectional Wireless Power Transmission via Resonant Antennas
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Solution Overview
Problem
Existing wireless charging systems require each device to have its own wired charger and power source, becoming unwieldy when multiple devices need charging, and lack the ability for wireless power exchange between devices, especially when one device is depleted while another has sufficient charge.
Innovation Solution
A bidirectional wireless power transmission system that allows devices to both receive and transmit wireless power using resonant antennas and power conversion circuits, enabling peer-to-peer energy transfer between devices, thereby facilitating convenient charging without the need for dedicated charging pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power transmission is implemented between devices, then power exchange capability is improved, but system complexity increases due to bidirectional transmitter-receiver requirements
Solution Approach 1:
The wireless power device is designed with both transmitter and receiver capabilities integrated into a single device. The device can function as a power transmitter when another device needs charging, and as a power receiver when it needs to recharge itself. This multi-functionality eliminates the need for separate dedicated charging devices and enables peer-to-peer wireless power exchange between devices.
2Reliability
If each device uses its own wired charger, then charging reliability is maintained, but ease of operation deteriorates due to multiple chargers and outlets required
Solution Approach 1:
The patent merges the functions of multiple wired chargers and power outlets into a single wireless power transmission system. Instead of requiring separate physical charging stations for each device, the system allows devices to wirelessly transmit and receive power directly to each other, consolidating what would otherwise require multiple separate charging infrastructure components into a unified peer-to-peer system.
3Ease of operation
If wireless power transmission is used, then ease of operation improves by eliminating wired chargers, but power transmission efficiency decreases due to wireless transfer losses
Solution Approach 1:
The wireless power transmission system dynamically adjusts its operation mode based on real-time conditions. When another device is available for peer-to-peer power transfer, the system uses bidirectional wireless transmission. When no other device is available or conditions are unfavorable, the system can switch to receiving power from traditional wired charging sources, optimizing efficiency based on the operational context.
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
Enables efficient wireless energy transfer between devices, allowing a device to charge from one source and then donate power to another, enhancing convenience by eliminating the need for inconveniently located charging pads and providing power replenishment or temporary charges as needed.
Implementation Method 1
a receive antenna and a bidirectional power conversion circuit, the receive antenna receiving an induced current from the antenna
Implementation Method 2
the bidirectional power conversion circuit generating an induced current at a resonant frequency into the antenna
Implementation Method 3
the bidirectional power conversion circuit rectifying the induced current into usable power
Data Source
AI summary
Exemplary embodiments are directed to wireless power transfer. A wireless power transceiver and device comprise an antenna including a parallel resonator configured to resonate in response to a substantially unmodulated carrier frequency. The wireless power transceiver further comprises a bidirectional power conversion circuit coupled to the parallel resonator. The bidirectional power conversion circuit is reconfigurable to rectify an induced current received at the antenna into DC power and to induce resonance at the antenna in response to DC power.