Nested Receiving Coil Switching for Multi-Level Wireless Power
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Solution Overview
Problem
Existing wireless power receiving apparatuses face compatibility issues with wireless power transmitting apparatuses due to differences in resonance frequencies and coil sizes, leading to limited power transmission efficiency and compatibility with various devices.
Innovation Solution
A wireless power receiving apparatus that combines a full-bridge rectifying circuit and a half-bridge rectifying circuit, using two receiving coils with the same center and different diameters, where the first coil is disposed within the second coil, and a switch controls their connection to adjust power reception based on the amount of power transmitted, allowing for multi-level power reception without expanding the coil area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless power receiving apparatus uses a single receiving coil with fixed size, then the apparatus size is reduced, but the compatibility with wireless power transmitting apparatuses of different power levels is degraded
Solution Approach 1:
The receiving coil is divided into multiple independent coils (first receiving coil and second receiving coil) with different sizes and resonance frequencies. Each coil is optimized for specific power levels, allowing the apparatus to adapt to different transmitting apparatuses by selecting the appropriate coil configuration.
Solution Approach 2:
The first receiving coil is disposed within the second receiving coil, creating a nested configuration. This allows both coils to coexist in a compact space without significantly increasing the overall apparatus size, while providing the capability to handle multiple power levels.
2Power
If the receiving coil area is expanded to receive higher power levels, then the power transmission efficiency is improved, but the apparatus size increases
Solution Approach 1:
By nesting the first receiving coil within the second receiving coil, the patent achieves multi-level power reception capability without proportionally increasing the apparatus area. The nested configuration allows efficient use of space while maintaining the ability to receive both low and high power levels.
Solution Approach 2:
The patent employs a switch to dynamically connect or disconnect the first and second receiving coils based on the detected power level. This dynamic reconfiguration allows the apparatus to optimize power reception efficiency for different power levels without requiring a permanently large coil structure.
3Adaptability or versatility
If multiple receiving coils with different resonance frequencies are used, then the compatibility with various transmitting apparatuses is improved, but the device complexity increases
Solution Approach 1:
The patent divides the receiving coil system into multiple independent coils, each with its own resonance frequency. This segmentation allows each coil to be optimized for specific frequency ranges, improving compatibility with different transmitting apparatuses while keeping each individual coil relatively simple.
Solution Approach 2:
A switch is used to dynamically reconfigure the circuit connections between the receiving coils and rectifying circuits based on the detected power level and resonance frequency requirements. This dynamic control enables the apparatus to adapt to different operating conditions without requiring a permanently complex circuit configuration.
4Power
If a full-bridge rectifying circuit is used for high power levels, then the power transmission efficiency is improved, but the device complexity and production cost increase
Solution Approach 1:
The patent uses a switch to dynamically select between full-bridge and half-bridge rectifying circuit configurations based on the detected power level. For high power levels, the full-bridge configuration is activated to maximize efficiency. For lower power levels, the half-bridge configuration is used, reducing component requirements and production costs.
Solution Approach 2:
The patent changes the operational parameters of the rectifying circuit by switching between different configurations (full-bridge and half-bridge) depending on the power level. This parameter change allows the system to optimize efficiency for high power while maintaining cost-effectiveness for lower power applications.
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 enhances power transmission efficiency and compatibility with different wireless power transmitting apparatuses by adjusting the connection of receiving coils based on transmitted power levels, reducing the apparatus size and production costs.
Implementation Method 1
the power may be transferred from the wireless power transmitting apparatus to the wireless power receiving apparatus through electromagnetic induction between the two apparatuses
Implementation Method 2
the wireless power receiving apparatus may receive the current through at least one of the first resonance circuit and the second resonance circuit based on resonance frequency of the wireless power transmitting apparatus
Data Source
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AI summary
The present disclosure relates to a wireless power receiving apparatus capable of receiving multi-level power transmitted by a wireless power transmitting apparatus. According to an embodiment of the present disclosure, the wireless power receiving apparatus includes a first receiving coil in which induced current is generated by electromagnetic induction, a second receiving coil connected in series with the first receiving coil by a switch, and a processor that is driven based on the induced current generated by the first receiving coil and controls the switch based on power information included in the induction current to selectively connect the first receiving coil and the second receiving coil.