Capacitive Power Receiver Shielding Electric Fields
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Solution Overview
Problem
Existing power transfer systems through capacitive coupling lack a practical configuration for incorporating devices that effectively suppress the adverse effects of electric fields on sensitive components and do not facilitate downsizing.
Innovation Solution
The configuration includes a power reception device with a high voltage side conductor and a low voltage side conductor that surrounds the high voltage side conductor, along with an electric feeder circuit and load circuit, where the module parts are mounted on a circuit board away from the high voltage side conductor to reduce electric field exposure and device size. Similarly, the power transmission device features a high-frequency high-voltage generator with module parts on a circuit board, positioned away from the high voltage side conductor to minimize electric field impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If module parts are disposed close to the high voltage side conductor for compact design, then device size is reduced, but the sensitive components are exposed to strong electric fields causing adverse effects
Solution Approach 1:
The patent utilizes the third dimension (depth/layer) by disposing module parts on the opposite side of the circuit board away from the high voltage side conductor. This spatial arrangement in three-dimensional space allows both compact device design and protection of sensitive components from electric field exposure, resolving the contradiction between device size and electric field exposure.
2Object-affected harmful factors
If the distance between high voltage side conductor and low voltage side conductor is increased to reduce electric field coupling, then electric field exposure is reduced, but power transfer efficiency decreases
Solution Approach 1:
The patent segments the device into distinct functional layers: the high voltage side conductor layer for power transfer and the low voltage side conductor layer with module parts for signal processing. This segmentation allows the high voltage conductor to be positioned close to the low voltage conductor for efficient power transfer, while the module parts are positioned on the opposite side to avoid electric field exposure, thus resolving the contradiction between power transfer efficiency and electric field exposure.
3Adaptability or versatility
If a practical device configuration is implemented for capacitive coupling power transfer, then device functionality is achieved, but the adverse effects of electric fields on sensitive components are not suppressed
Solution Approach 1:
The low voltage side conductor acts as an intermediary element between the high voltage side conductor and the sensitive module parts. It is positioned close to the high voltage conductor for efficient capacitive coupling power transfer, while the module parts are positioned on the opposite side of the circuit board, using the low voltage conductor as a buffer to shield them from direct electric field exposure, thus resolving the contradiction between device functionality and electric field suppression.
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 protects sensitive components from electric field effects, reduces device size, and minimizes unnecessary radiation, while enhancing power transfer efficiency by shortening the distance between conductors and utilizing the circuit board for module placement.
Implementation Method 1
a power transmission device side capacitive coupling electrode (13, 14) and a power reception device side capacitive coupling electrode (11, 12)
Implementation Method 2
a low voltage side conductor (12) extending around a high voltage side conductor (11)
Implementation Method 3
an electric feeder circuit (32) configured to feed electric power induced between the high voltage side conductor (11) and the low voltage side conductor (12) to a load (31)
Data Source
AI summary
A power reception device and a power transmission device which are capable of suppressing an adverse effect of an electric field. A power reception device includes a capacitive coupling electrode comprising a high voltage side conductor and a low voltage side conductor extending around the high voltage side conductor. The high voltage side conductor is disposed on a surface of a housing. The low voltage side conductor is disposed inside a circuit board. A plurality of module parts are mounted on a surface of the circuit board which is located on an opposite side away from the high voltage side conductor with respect to the low voltage side conductor.