Multi-Loop Wireless Power Receiver Coil Configuration
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies and practical limitations in charging devices due to the need for physical connections and the complexity of achieving uniform magnetic fields for effective power transfer.
Innovation Solution
A wireless power receiver coil configuration with at least three loop portions, where the second and third loop portions are at least partially enclosed by the first loop portion and non-circumscribing/non-overlapping, allows for efficient energy transfer by averaging the magnetic field and minimizing voltage variance, enabling effective power reception and delivery to devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single loop coil configuration is used for wireless power reception, then the device structure is simple, but the magnetic field uniformity is poor and voltage variance is high
Solution Approach 1:
The single loop coil is divided into multiple loop portions (first loop portion, second loop portion, third loop portion) with different orientations. Each loop portion captures magnetic flux from different directions, and their combined effect averages the magnetic field, reducing voltage variance and improving power transfer reliability while maintaining relatively simple device structure.
2Adaptability or versatility
If multiple resonance coils with different diameters are used, then the adaptability to different device sizes is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Different loop portions are designed with different local characteristics (different orientations and effective areas), where each loop portion is optimized to capture magnetic flux from specific directions. This local differentiation allows the overall coil to adapt to various device sizes and magnetic field configurations without requiring multiple separate coils of different diameters.
3Reliability
If wired connection is used for charging, then the power transfer is reliable and efficient, but the ease of operation and convenience are reduced
Solution Approach 1:
The mechanical wired connection system is replaced with a wireless electromagnetic induction system. The receiver coil utilizes electromagnetic induction to transfer power wirelessly, eliminating the need for physical cable connections while maintaining reliable and efficient power transfer through optimized multi-loop coil configuration.
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 configuration enhances the efficiency and variability of wireless power transfer by averaging the magnetic field, reducing voltage variance, and allowing for more design flexibility, thereby improving the reliability and effectiveness of wireless charging systems.
Implementation Method 1
The coil is configured to generate a voltage in response to a magnetic field generated by a transmitter
Implementation Method 2
a second self-resonant coil electromagnetically resonating with a spaced, first self-resonant coil to perform at least one of transmitting power to the first self-resonant coil and receiving power from the first self-resonant coil
Data Source
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AI summary
Systems, methods and apparatus are disclosed for wirelessly receiving power. In one aspect, a coil is configured generate a voltage in response to magnetic field generated by a transmitter. The coil comprises a conductive material wound into at least three non-overlapping loop portions. The coil further includes a first loop portion, a second loop portion, and a third loop portion. The second and third loop portions at least partially enclosed by the first loop portion, the second and third loop portions non-circumscribing each other.