Integrated Rectifier in Resonant Coil Case for Wireless Power
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Solution Overview
Problem
In noncontact electric power feeding systems using the resonance method, the limited space within coil cases poses challenges for installing electrical equipment due to the need for power and signal lines, which can affect the electromagnetic field and reduce transmission efficiency.
Innovation Solution
Integrating an electric power receiving antenna and a rectifier within the coil cases to receive and rectify electric power from the electromagnetic field, eliminating the need for external power supply lines and enhancing shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines and signal lines are provided within coil cases to supply power to electrical equipment, then electrical equipment can operate, but the limited space restricts installation positions and the lines may affect the electromagnetic field during resonance
Solution Approach 1:
The patent extracts the power supply function from external power lines and implements it through an integrated power supply unit within the coil case. This unit includes a power supply terminal that contacts the coil case internally, eliminating the need for external power lines passing through the coil case structure, thereby avoiding electromagnetic field interference while maintaining space efficiency
Solution Approach 2:
The patent introduces an intermediary power supply terminal structure that mediates between the external power source and the electrical equipment. The terminal is embedded in the coil case and provides power through contact with the case itself, serving as an intermediate power transmission path that avoids the problems of external wiring
2Reliability
If electrical equipment is installed within coil cases, then monitoring and cooling functions are improved, but the space for installing equipment and lines is limited
Solution Approach 1:
The patent merges the power supply function with the coil case structure by integrating a power supply terminal directly into the case. This consolidation eliminates the need for separate power line routing space and allows electrical equipment to be positioned more flexibly within the available volume, effectively increasing the usable installation area
Solution Approach 2:
The patent utilizes the internal surface area of the coil case as a mounting dimension for the power supply terminal. By distributing components along the internal surfaces and utilizing three-dimensional space efficiently, the design maximizes the use of available volume rather than being constrained by two-dimensional surface mounting limitations
3Power
If power lines are provided close to self-resonant coils for power supply, then electrical equipment receives power, but the lines may affect the electromagnetic field when coils perform electromagnetic resonance
Solution Approach 1:
The patent extracts the power supply terminal from external positioning and relocates it to an internal position within the coil case structure. This repositioning allows the terminal to be strategically placed away from the resonant coil windings, eliminating electromagnetic field interference while maintaining efficient power delivery to electrical equipment
Solution Approach 2:
The patent applies local quality optimization by positioning the power supply terminal in a specific location within the coil case where electromagnetic field interference is minimized. The terminal is placed in a region with lower electromagnetic field intensity, allowing power supply functionality while maintaining high transmission efficiency of the resonant system
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
Enables efficient power feeding to electrical equipment within coil cases without reducing transmission efficiency or affecting electromagnetic resonance, providing greater installation flexibility and preventing electromagnetic field leakage.
Implementation Method 1
a pair of resonators (for example, a pair of self-resonant coils) are caused to resonate in an electromagnetic field (a near field) to transmit electric power via the electromagnetic field
Implementation Method 2
the resonance method is a noncontact electric power transmission technique in which a pair of resonators
Implementation Method 3
integrating an electric power receiving antenna and a rectifier within the coil cases to receive and rectify electric power
Data Source
Figure 1~2
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AI summary
In a noncontact electric power feeding system using a resonance method, electrical equipment (400) installed within a coil case is configured to include an electric power receiving antenna (410) and a rectifier (420) in an integrated manner. The electrical equipment (400) is driven by receiving electric power from an electromagnetic field generated by electromagnetic resonance, without power supply from the outside of the coil case.