Induction Heating Apparatus with Polar Extensions
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Solution Overview
Problem
Existing induction heating apparatuses for metal products fail to achieve uniform heat distribution across the entire volume, particularly causing temperature differences between edges and other zones, leading to surface cracks and imperfections.
Innovation Solution
An induction heating apparatus with a magnetic core and multiple polar extensions, each with independent electric coils, allowing for selective and uniform heating of metal products by controlling the polarity, frequency, and power delivery to specific edges, and enabling mobility to adapt to different cross-sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If known induction heating apparatuses are used to heat metal products, then heating can be performed, but uniform heat distribution throughout the volume cannot be achieved and edge temperature control is poor
Solution Approach 1:
The heating apparatus divides the heating function into multiple independent polar extensions (at least four), each with its own electric coil. This segmentation allows independent control of heating parameters for different regions of the metal product, enabling uniform heat distribution and precise temperature control across the entire volume, including edges.
Solution Approach 2:
Each polar extension is equipped with an independent electric coil that can be individually controlled to provide localized heating. This allows different zones of the metal product (edges vs. core, different edges) to receive customized heating parameters, achieving both uniform overall distribution and precise local temperature control.
2Adaptability or versatility
If induction heating apparatuses heat two opposite edges at a time or use multiple ferromagnetic cores, then some edges can be heated, but selective differentiation of heating power for individual edges is not possible
Solution Approach 1:
The apparatus segments the heating system into at least four independent polar extensions, each with its own electric coil. This segmentation enables selective activation and independent power control of individual polar extensions, allowing flexible heating of specific edges or zones without requiring complex multi-core configurations.
Solution Approach 2:
Each polar extension serves multiple functions: it can be independently activated or deactivated, its power can be individually adjusted, and it can operate with variable frequency. This multi-functionality provides selective heating capability while maintaining a relatively simple and unified structural design.
3Reliability
If traditional induction heating methods are used, then heating can be performed, but edge zones remain colder than other zones causing surface cracks and imperfections
Solution Approach 1:
By dividing the heating system into multiple independently controllable polar extensions, the apparatus can specifically target and increase heating power to edge zones that traditionally remain colder. This segmentation enables corrective heating of problematic areas, eliminating temperature differentials that cause surface cracks and improving overall product reliability.
Solution Approach 2:
The independent electric coils associated with each polar extension allow localized adjustment of heating parameters for edge zones. This enables precise temperature control at edges, ensuring they reach the same temperature as other zones, thereby preventing surface cracks and quality defects.
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
Ensures uniform heat distribution and efficient heating of metal products with varying cross-sections, reducing the risk of cracks and imperfections by allowing precise control over heat power transfer to all edges.
Implementation Method 1
The heating apparatus uses electromagnetic induction to heat the metal products
Implementation Method 2
allow to heat part of the section of the metal product due to the Joule effect
Data Source
Figure 1~2
Figure 3~6
Figure 7~9
AI summary
Heating apparatus (10) for heating selectively and with the desired heat power one or more edges (12) of a metal product (11) by means of electromagnetic induction, said heating apparatus comprising a magnetic core (13) having a through aperture (14) and at least four polar extensions (18).