Efficient Wireless Power Transmission for Multi-Device Charging
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Summary
Problems
Existing wireless power transmission systems face efficiency drops due to misalignment between transmission and reception apparatuses, especially when charging multiple devices simultaneously, leading to uneven charging and interference between coils.
Innovation solutions
A wireless power transmission apparatus with a magnetic coupler composed of multiple coils and variable capacitors, where the number of coils and resonance frequency are adjusted based on detected positions and directions of receiving devices, using a sensor to optimize power transfer efficiency even in misaligned states and varying battery conditions.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a single wireless power transmission apparatus charges multiple wireless power reception apparatuses simultaneously, then the productivity of power charging is improved, but the power transfer efficiency deteriorates due to misalignment between the driving coil and receiving coils
Why choose this principle:
The magnetic coupler is divided into multiple coils (first coil, second coil, third coil, fourth coil) arranged in a specific pattern. Each coil can independently adjust its resonance frequency to match with corresponding receiving coils, enabling simultaneous efficient charging of multiple devices without requiring perfect alignment with the transmission apparatus.
Principle concept:
If multiple wireless power reception apparatuses are charged simultaneously, then the productivity is improved, but interference occurs between receiving coils leading to reduced power transfer efficiency
Why choose this principle:
Each coil in the magnetic coupler is equipped with independent variable capacitors that can adjust resonance frequencies locally. This allows each coil to be optimized for its specific receiving coil, reducing interference between adjacent coils while maintaining high power transfer efficiency for multiple simultaneous charges.
Application Domain
Data Source
AI summary:
A wireless power transmission apparatus with a magnetic coupler composed of multiple coils and variable capacitors, where the number of coils and resonance frequency are adjusted based on detected positions and directions of receiving devices, using a sensor to optimize power transfer efficiency even in misaligned states and varying battery conditions.
Abstract
A wireless power transmission apparatus for multiple simultaneous charging is disclosed. The disclosed apparatus, which may be a wireless power transmission apparatus configured to provide charging power simultaneously to a multiple number of wireless power reception apparatuses, may include: a driving coil configured to transmit wireless power; a magnetic coupler inductively coupled with the driving coil; and a resonance frequency adjustment part configured to adjust a resonance frequency of the magnetic coupler, where the magnetic coupler includes a multiple number of coils, and a variable capacitor is joined to each of the multiple coils. The disclosed apparatus can improve power transfer efficiency while providing power simultaneously to a multiple number of wireless power reception apparatuses.