Wireless Charging Receiver Coil with Ferrite Sheet
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Solution Overview
Problem
Existing wireless charging systems face inefficiencies in charging portable electronic devices due to variations in device specifications, coil design, and compatibility issues, leading to suboptimal charging efficiency and damage from manual attachment and detachment of charging cables.
Innovation Solution
A wireless charging system with a designed coil structure featuring a NFC coil and a ferrite sheet, separated from the primary coil, and a control unit for managing power reception, allowing for efficient wireless power transfer and enhanced magnetic field reception efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil is used for wireless charging, then the device structure is simple, but charging efficiency varies significantly with device placement position
Solution Approach 1:
The patent divides a single large coil into multiple smaller coils arranged in an array. This segmentation allows selective activation of specific coils based on device placement position, maintaining high charging efficiency regardless of where the device is placed on the charging surface.
Solution Approach 2:
The system dynamically selects and activates appropriate coils based on real-time detection of device placement position. This dynamic adaptation ensures optimal charging efficiency for any device position without requiring manual intervention or precise placement.
2Adaptability or versatility
If wireless charging components are added to portable devices, then wireless charging capability is achieved, but device weight increases
Solution Approach 1:
The patent combines the NFC coil and ferrite sheet into an integrated structure that serves dual purposes: NFC communication and wireless power reception. This merging reduces the number of separate components needed, thereby reducing overall weight while maintaining both functionalities.
Solution Approach 2:
The ferrite sheet serves multiple functions: it enhances magnetic field reception for wireless charging, provides structural support, and works in conjunction with the NFC coil for both NFC communication and power transfer. This multi-functionality reduces the need for additional dedicated components.
3Adaptability or versatility
If wireless charging components are added to portable devices, then wireless charging capability is achieved, but device volume increases
Solution Approach 1:
The patent uses thin ferrite sheets instead of bulky magnetic shielding materials. These thin films provide necessary magnetic field enhancement and reception capabilities while occupying minimal space within the device structure, thus avoiding significant volume increase.
4Device complexity
If manual cable attachment and detachment is used for charging, then device structure is simple, but connection parts suffer from abrasion and damage
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless electromagnetic induction system. This substitution eliminates physical contact between charging components, thereby preventing abrasion, damage, and wear associated with repeated plugging and unplugging of cables.
5Manufacturing precision
If different charging specifications are used for various devices, then each device can be optimized, but compatibility problems arise
Solution Approach 1:
The patent designs a universal charging platform with multiple coils that can detect and adapt to different device types, sizes, and power requirements. The system provides optimized charging for each device while maintaining compatibility across diverse device specifications through automatic parameter adjustment.
Solution Approach 2:
The charging system dynamically adjusts operational parameters such as frequency, power level, and active coil selection based on the detected device characteristics. This parameter adaptation enables the same charging device to work optimally with various device specifications without requiring device-specific chargers.
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 solution enables selective wireless power reception, improving charging efficiency and reducing device damage by optimizing coil placement and design, allowing for flexible and efficient power transfer across various devices.
Implementation Method 1
capable of receiving power energy using non-contact type magnetic induction
Implementation Method 2
a ferrite sheet further provided at the coil and the NFC coil
Data Source
AI summary
A receiver for a wireless charging system, capable of receiving power energy using non-contact type magnetic induction, includes a coil capable of receiving the power energy and a part for generating a predetermined output power from the power energy received by the coil, a portable terminal, an NFC coil further provided outside of the coil, and a ferrite sheet further provided at the coil and the NFC coil.