3D Orthogonal Coil Wireless Power Transmitter
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Solution Overview
Problem
Existing short distance wireless power communication systems, particularly contactless chargers, face inefficiencies in power transmission and directional limitations, leading to potential fire risks and reduced lifespan due to instantaneous discharge and self-discharge phenomena, and require improved methods for efficient power transfer regardless of the receiving device's orientation.
Innovation Solution
A coil resonant coupler system comprising three perpendicularly installed annular coils with a magnetic focusing plate, utilizing a meta-material structure and ferrite for enhanced magnetic resonance, along with a position sensing unit and transmission controlling unit to adjust power signal generation and decoupling based on the receiving device's position, ensuring efficient power transmission in any direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single coil is used for wireless power transmission, then the device structure is simple, but power transmission efficiency is low and directional limitations exist
Solution Approach 1:
The single coil is divided into three separate coils arranged perpendicularly to each other along the x, y, and z axes. Each coil can independently generate magnetic flux in its respective direction, enabling the system to transmit power efficiently regardless of the receiving device's orientation while maintaining structural simplicity through modular design.
Solution Approach 2:
The patent transitions from a two-dimensional planar coil arrangement to a three-dimensional spatial configuration with coils oriented along three perpendicular axes. This dimensional expansion enables omnidirectional power transmission capability, allowing the transmitting apparatus to efficiently charge receiving devices from any orientation in 3D space.
2Ease of operation
If the receiving apparatus is positioned far from the transmitting apparatus, then operational flexibility is improved, but power transmission efficiency decreases
Solution Approach 1:
The patent employs a dynamic control system that senses the position and orientation of the receiving apparatus and automatically adjusts which coils are activated and their respective power levels. This dynamic adaptation allows the system to maintain high transmission efficiency across varying distances and orientations, extending the effective operating range while preserving efficiency.
3Loss of energy
If terminal contact is used for power supply, then power transmission efficiency is high, but fire risk and self-discharge increase
Solution Approach 1:
The patent replaces the mechanical contact-based power transmission system with a contactless magnetic resonance wireless power transmission system. By using electromagnetic fields instead of physical terminal contact, the system achieves efficient power transfer while eliminating the fire hazards and self-discharge issues associated with terminal connections.
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
The system enables efficient wireless power reception and improved transmission efficiency regardless of the receiving device's orientation, reducing the risk of fire and self-discharge, and enhancing the lifespan and performance of both the charger and battery.
Implementation Method 1
the secondary coil charges electricity of an electromotive force induced by a magnetic field generated in the primary coil
Implementation Method 2
magnetic resonance type wireless power communication system in which less or more directed electromagnetic waves are generated
Implementation Method 3
the magnetic focusing plate may comprise ferrite
Data Source
AI summary
Disclosed herein are a coil resonant coupler for short distance wireless power communication and a short distance wireless power transmitting apparatus comprising the same. The coil resonant coupler for short distance wireless power communication comprises a first coil installed perpendicularly to a first axis; a second coil installed perpendicularly to a second axis perpendicular to the first axis; and a third coil installed perpendicularly to a third axis perpendicular to each of the first and second axes. The short distance wireless power transmitting apparatus comprises a primary side core comprising the above-described coil resonant coupler, a position sensing unit which senses a position of the wireless power receiving apparatus to generate position information, and a transmission controlling unit which controls the primary side core based on the position information.