Induction Hob Coil Mounting for EMI Shielding
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Solution Overview
Problem
Current induction hobs face challenges in providing effective electromagnetic interference (EMI) shielding and robust, reliable mounting for induction coils, which can disrupt EMI shielding efficiency and lead to vibration and noise during operation.
Innovation Solution
The induction hob features a stacked arrangement with a metal coil carrier plate and a cooktop plate, where the induction coil is supported by elastic, electrically insulating support elements made from materials like silicone, which generate elastic forces to maintain close contact with the cooktop plate, reducing EMI noise and enhancing cooling through an air gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the induction coil is mounted directly on the coil carrier plate using adhesive or rigid support, then the mounting is simple and robust, but the electromagnetic shielding efficiency is disrupted and vibration noise increases
Solution Approach 1:
The patent introduces an elastic support element as an intermediary component between the induction coil and the coil carrier plate. This support element is made of electrically insulating material that provides mechanical support while maintaining electromagnetic shielding efficiency, thus resolving the contradiction between mounting reliability and EMI shielding performance
Solution Approach 2:
The patent changes the physical parameters of the support structure by using elastic material with specific electrical insulation properties. The elastic support element can deform to accommodate thermal expansion and vibration, maintaining reliable mounting while preserving EMI shielding through its electrical insulation characteristics
2Stability of the object's composition
If the induction coil is firmly fixed to the coil carrier plate, then the mounting is stable, but vibration and noise during operation increase
Solution Approach 1:
The patent changes the mechanical properties of the support structure by using elastic material that can deform under vibration and thermal stress. This elasticity allows the mounting to remain stable while absorbing vibration energy, thus reducing operational noise
Solution Approach 2:
The elastic support element acts as a cushioning element that is pre-installed between the induction coil and the carrier plate. This cushioning structure absorbs vibrations and shocks before they can propagate through the system, reducing noise while maintaining stability
3Ease of manufacture
If adhesive is used to mount the induction coil, then the assembly is simple, but the EMI shielding efficiency is compromised
Solution Approach 1:
The elastic support element serves as an intermediary that replaces adhesive in the mounting process. It provides both mechanical attachment and electrical insulation in a single component, maintaining assembly simplicity while ensuring EMI shielding efficiency through its inherent insulating properties
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 achieves low EMI disturbances, improved induction efficiency, reduced vibration and noise, and enhanced cooking performance by ensuring robust mounting and efficient heat removal from the induction coil.
Implementation Method 1
the support element and/or the insulating material, is implemented to generate an elastic force urging the induction coil towards the cooktop plate
Implementation Method 2
an induction hob (1) is provided which comprises in a stacked arrangement, i.e. in an arrangement in which respective elements are arranged on top of each other, a coil carrier plate (2), an induction coil (3) and a cooktop plate (4)
Implementation Method 3
The cooktop plate is required to be made from a material permeable or even transparent for magnetic induction fields generated by the induction coil arranged beneath
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention in particular is related to a to an induction hob comprising in a stacked arrangement a coil carrier plate (2), an induction coil (3) and a cooktop plate (4). The induction coil (3) is supported on the coil carrier plate (2) by means of at least one elastic, in particular resilient, support element (5) which is made from an electrically insulating material. The support element (5) is implemented to generate an elastic force (F) urging the induction coil (3) towards the cooktop plate (4) at least in the ordinary working arrangement of the induction hob (1).