Underwater Wireless Power Transmitting Coil Support Structure

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Solution Overview

Problem

Annular power transmitting coils used in underwater wireless power transmission can deform due to water flow, leading to a decrease in magnetic field efficiency and transmission efficiency.

Innovation Solution

A power transmitting device with annular coils that includes a support member, such as a bobbin, to maintain the coil shape and a capacitor forming a resonance circuit with the coil, preventing deformation and maintaining magnetic field strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If annular power transmitting coils are used for underwater wireless power transmission, then power transmission capability is improved, but coil deformation due to water flow causes decrease in magnetic field efficiency and transmission efficiency

Engineering Contradiction:
Improvepower transmission capabilityVSAvoidtransmission efficiency
Core Design Contradiction:
PowerVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-installing support members (such as struts or rigid frameworks) within the annular power transmitting coils before deployment. These support members are positioned in advance to prevent coil deformation when exposed to water flow, thereby maintaining magnetic field efficiency and ensuring reliable power transmission without compromising the power transmission capability

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces support members as intermediary structures between the water flow environment and the power transmitting coils. These intermediaries absorb or redistribute the mechanical stress from water flow, preventing direct deformation of the coils and maintaining their geometric integrity for efficient magnetic field generation and power transmission

Inventive Principle:
Principle #24Intermediary (Mediator)

2Power

If annular power transmitting coils are used for underwater wireless power transmission, then power transmission capability is improved, but coil deformation due to water flow causes decrease in magnetic field efficiency

Engineering Contradiction:
Improvepower transmission capabilityVSAvoidmagnetic field efficiency
Core Design Contradiction:
PowerVSStrength

Solution Approach 1:

The patent applies preliminary action by pre-installing support members (such as struts or rigid frameworks) within the annular power transmitting coils before deployment. These support members are positioned in advance to prevent coil deformation when exposed to water flow, thereby maintaining magnetic field efficiency and ensuring reliable power transmission without compromising the power transmission capability

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent employs composite material structures for the coil assembly, combining flexible conducting materials with rigid support structures. This composite approach allows the coil to maintain its geometric shape and magnetic field efficiency while being able to withstand water flow forces, thus preserving both power transmission capability and magnetic field strength

Inventive Principle:
Principle #40Composite materials

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

Prevents deformation of the coils and maintains transmission efficiency during underwater wireless power transmission by stabilizing the magnetic field and ensuring consistent power delivery.

Implementation Method 1

a power transmitting resonance coil transmits the power to a power receiving resonance coil of the power receiving device in a contactless manner by using a magnetic field resonance method

Methodology Applied
Scientific EffectMagnetic field resonance: Resonance

Implementation Method 2

a capacitor connected to the transmitting coil, and forming a resonance circuit resonating together with the transmitting coil

Methodology Applied
Scientific EffectResonance circuit: Resonance

Data Source

PatentUS11502550B2Power transmitting device that transmits power to power receiving device having power receiving coil in water
Publication Date: 2022.11.15 PANASONIC HOLDINGS CORP
  • US11502550B2 patent drawing
  • US11502550B2 patent drawing
  • US11502550B2 patent drawing

AI summary

A power transmitting device transmits power to a power receiving device having a power receiving coil in water. The power transmitting device includes a power transmitting coil configured to transmit the power to the power receiving coil via a magnetic field. The power transmitting device also includes a support member that supports the power transmitting coil, and one or more spacers that hold the transmitting coil and the support member.