Induction Cooking Top Elongated Ring Windings Uniform Field
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing induction cooking tops require a large number of windings to generate a uniform electromagnetic field, leading to high costs, complex control systems, and inefficiencies when heating pots of different sizes.
Innovation Solution
The use of at least three elongated ring-shaped windings arranged in two different directions to create a closed area on the cooking top, with additional windings overlapping at their ends, reduces the number of heating elements and simplifies the control system while maintaining uniform electromagnetic field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple small inductors are arranged side by side to cover adjacent cooking areas, then the cooking top can accommodate multiple pots, but the device becomes more expensive and complex
Solution Approach 1:
The patent divides a single large inductor into multiple independent elongated ring-shaped windings arranged in different directions. Each winding can be independently controlled to heat different areas, allowing multiple pots to be accommodated while using fewer total windings compared to traditional side-by-side inductor arrangements.
Solution Approach 2:
The elongated ring-shaped windings are designed to serve multiple functions: they can individually heat small pots, work in combination to heat medium-sized pots, and collectively provide uniform heating for large pots. This multi-functionality reduces the need for separate inductors for different cooking scenarios.
2Manufacturing precision
If a large number of windings are used to generate a uniform electromagnetic field, then homogeneous heating is achieved, but the cost and device complexity increase significantly
Solution Approach 1:
The patent positions elongated ring-shaped windings at specific locations and orientations (at least two different directions) to create overlapping electromagnetic field zones. This strategic local arrangement ensures uniform field distribution across the cooking surface while using fewer windings, as each winding contributes to multiple local heating zones through its elongated geometry and directional placement.
3Device complexity
If traditional elongated rectangular windings are used, then the structure is simple, but the electromagnetic field is not uniform and heating efficiency decreases
Solution Approach 1:
The patent transitions from traditional single-direction elongated rectangular windings to elongated ring-shaped windings arranged in at least two different directions. This dimensional change creates a more isotropic electromagnetic field distribution, improving uniformity while maintaining structural simplicity through the use of standard winding techniques.
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 allows for efficient and uniform heating of variously sized pots with fewer windings, reducing costs and complexity, and enabling automatic power adjustment based on pot size through current monitoring.
Implementation Method 1
inductors comprising copper wire windings where an oscillating current (e.g. an alternating current) is circulated to produce an oscillating electromagnetic field
Implementation Method 2
Induction cooking tops are devices which exploit the phenomenon of induction heating for food cooking purposes
Implementation Method 3
The parasitic current circulating in the pot produces heat by dissipation; said heat is generated only within the pot
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The present invention relates to an induction cooking top comprising at least three windings having the shape of an elongated ring, wherein the longitudinal axes of such windings are arranged in at least two different directions (x,y) in a manner such that the projections of the longitudinal axes on a plane define a closed area in that plane.