Relay Coil Layout for Induction Hob NFC Through Insulator Sheets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The insulator sheet in induction stoves, such as mica sheets, interferes with communication between the induction stove and external devices due to its close proximity to the control circuit, causing communication failures in near-field communication systems.
Innovation Solution
An electromagnetic induction device with a wireless power transmission unit and a communication unit, including a communication coil that outputs a carrier wave at a frequency different from the induction coil's driving frequency, and a relay circuit with a relay coil and electrodes on a dielectric sheet, allowing for orthogonal alignment and resonance to enhance communication performance without electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulator sheet is placed close to the control circuit to prevent electric shock, then safety is improved, but communication performance deteriorates due to interference
Solution Approach 1:
The patent introduces a relay antenna as an intermediary component that receives communication signals from the control circuit and retransmits them through the insulator sheet. This mediator allows communication to occur despite the insulator sheet's interference, resolving the contradiction between maintaining safety through close placement and preserving communication performance.
2Loss of information
If the relay antenna is buried in the glass upper plate to solve communication interference, then communication performance is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent merges the relay antenna with the insulator sheet by positioning the antenna on the same plane as the insulator sheet and using the insulator sheet's structure to support the antenna. This integration eliminates the need for separate embedding processes in the glass upper plate, significantly reducing manufacturing complexity and cost while maintaining communication performance.
3Ease of manufacture
If the relay antenna is designed in the insulator sheet to reduce cost and thickness, then manufacturing cost and product size are reduced, but electrical insulation may be compromised
Solution Approach 1:
The patent applies local quality by creating electrical insulation only in the specific region where the relay antenna is positioned on the insulator sheet, while maintaining electrical conductivity in other necessary areas. This localized insulation approach ensures that communication functionality is protected without compromising the overall electrical insulation requirements of the 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
The solution enables effective wireless communication and power transmission while maintaining safety by positioning the relay circuit on the insulator sheet, reducing product size and cost, and ensuring electrical insulation from the live working coil.
Implementation Method 1
an induction coil configured to generate a magnetic flux in an up-down direction to heat an external device located above the induction coil by induction heating
Implementation Method 2
a relay circuit configured to resonate at a frequency of the carrier wave, to wirelessly communicate with the external device
Data Source
AI summary
An electromagnetic induction device including a wireless power transmission unit including an induction coil configured to generate a magnetic flux in an up-down direction to heat an external device located above the indication coil by induction heating, and a communication unit including a communication coil configured to output a carrier wave, and a relay circuit configured to resonate at a frequency of the carrier wave, to wirelessly communicate with the external device.