Wireless Power Magnetic Coupler with Variable Capacitors
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Solution Overview
Problem
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 Solution
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.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
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
Solution Approach 1:
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.
2Productivity
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
Solution Approach 1:
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.
3Ease of operation
If the wireless power transmission apparatus and wireless power reception apparatus are not perfectly aligned, then the ease of operation is improved, but the power transfer efficiency deteriorates significantly
Solution Approach 1:
The system dynamically adjusts the resonance frequencies of the magnetic coupler coils based on the positions and directions of receiving devices detected by the sensor part. This dynamic adjustment maintains optimal power transfer efficiency even when devices are not perfectly aligned, as the resonance frequencies are adapted to the actual spatial configuration.
4Adaptability or versatility
If power is distributed to multiple devices with varying battery capacities and states, then the adaptability is improved, but the power transfer efficiency deteriorates due to non-uniform power distribution
Solution Approach 1:
The resonance frequencies of the magnetic coupler coils are adjusted according to the positions, directions, and power reception requirements of different devices. By changing the resonance frequency parameters dynamically, the system can efficiently distribute power to multiple devices with varying battery capacities and charging states, maintaining high transfer efficiency across non-uniform power distribution scenarios.
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 solution maintains high power transfer efficiency across multiple devices, even with misalignment and varying battery states, by dynamically adjusting resonance frequencies and capacitance, thereby improving overall charging efficiency and reducing interference.
Implementation Method 1
a driving coil configured to transmit wireless power; a magnetic coupler inductively coupled with the driving coil
Implementation Method 2
a magnetic coupler inductively coupled with the driving coil
Implementation Method 3
a resonance frequency adjustment part configured to adjust a resonance frequency of the magnetic coupler
Data Source
AI summary
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.