Multi-Coil Non-Contact Power Supply Circuit for Moving Appliances
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Solution Overview
Problem
Conventional non-contact power transmission methods using direct correspondence between coils are limited by size constraints and efficiency variations due to changing coil positions, failing to meet the needs of home appliances with moving parts, such as doors and drawers, which require stable and efficient power supply.
Innovation Solution
A multi-coil matching non-contact power supply circuit is implemented, utilizing multiple transmitting and receiving coils arranged in various configurations to enhance efficiency and adapt to different sizes and movements, including translational and rotational movements, with the coils' normal directions aligned or at an angle, allowing for improved coupling and power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If direct correspondence between transmitting coil and receiving coil is used, then the structure is simple, but the power transmission efficiency varies with coil position changes
Solution Approach 1:
The patent divides the single coil system into multiple transmitting coils and multiple receiving coils. Each transmitting coil corresponds to one or more receiving coils, creating a segmented power transmission system that maintains efficiency across different positions while avoiding the need for a single large complex coil structure.
Solution Approach 2:
The patent creates a multi-coil system where each coil can serve multiple functions - a transmitting coil can power multiple receiving coils, and a receiving coil can be powered by multiple transmitting coils. This universal configuration allows the system to adapt to various positions and orientations while maintaining efficient power transmission.
2Loss of energy
If coil size is increased to improve power transmission, then the transmission efficiency improves, but the installation space requirement increases
Solution Approach 1:
Instead of using one large coil, the patent segments the coil system into multiple smaller transmitting coils and receiving coils. These smaller coils can be distributed across the available space, achieving the required power transmission efficiency without requiring a single large installation area.
Solution Approach 2:
The patent arranges multiple coils in spatial configurations that utilize three-dimensional space rather than just expanding in one plane. By stacking or distributing coils vertically or in different orientations, the system achieves high transmission efficiency without proportionally increasing the footprint installation area.
3Reliability
If physical connection (hinge wire) is used to connect moving parts, then the electrical connection is reliable, but the physical wear and safety issues occur
Solution Approach 1:
The patent replaces the mechanical hinge wire connection with a non-contact electromagnetic power transmission system using multiple coils. This substitution eliminates the physical contact and associated wear, friction, and safety hazards while maintaining reliable electrical power delivery to moving parts through electromagnetic coupling.
4Device complexity
If single transmitting coil and single receiving coil are used, then the system is simple, but the adaptability to different positions and orientations is limited
Solution Approach 1:
The patent segments the power transmission system into multiple transmitting coils and multiple receiving coils that can be independently positioned and oriented. This segmentation allows each coil to be optimally aligned with its corresponding coils, providing high adaptability to different positions and orientations without requiring a single complex adjustable mechanism.
Solution Approach 2:
The patent creates a dynamic coil configuration where the system can adapt to moving parts by having multiple coils that can maintain optimal alignment during motion. The multi-coil arrangement allows the system to dynamically adjust power transmission paths as positions change, maintaining efficiency throughout the range of motion.
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 improves power transmission efficiency and adaptability, enabling stable power supply to appliances with varying sizes and movements, while reducing coil size limitations and maintaining efficient energy transfer across different installation environments.
Implementation Method 1
achieved according to the principle of electromagnetic coupling between the coils
Implementation Method 2
The transmitting side includes a resonant circuit and a transmitting coil; the receiving side includes a receiving coil, a resonance circuit
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The present invention relates to a non-contact power supply circuit including a primary circuit and a secondary circuit, the primary circuit transfers energy to the secondary circuit via electromagnetic coupling, wherein the primary circuit has at least one transmitting coil and the secondary circuit has at least one receiving coil, and the normal direction of the at least one transmitting coil and the normal direction of the at least one receiving coil are the same or have a first angle, characterized in that, the quantity of the at least one transmitting coil and the at least one receiving coil is greater than two. In this way, it is possible to dispose more than one receiving coil or more than one transmitting coil, which allows the receiving efficiency or the transmitting efficiency being improved. In addition, since it is possible to dispose more than one receiving coil or transmitting coil, the size of a single coil can be made relatively smaller, which makes fewer installation constraints due to the small size, and thus the non-contact power supply circuit is suitable for appliances with different sizes.