Induction Heating Device Magnetic Plate Field Control
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Solution Overview
Problem
Existing induction heating technologies face challenges in achieving uniform heating due to the concentration of magnetic fields at surface variations and corners of non-flat workpieces, leading to inefficient heat distribution and overheating.
Innovation Solution
A magnetic conductive plate is strategically positioned relative to the induction coil to control the magnetic field distribution, either blocking or enhancing magnetic lines based on its location, ensuring uniform heating by varying its position in relation to the target object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an induction coil is disposed spirally surrounding a target workpiece, then heating speed is improved, but heating uniformity deteriorates due to magnetic field concentration at surface variations and corners
Solution Approach 1:
A magnetic conductive plate is introduced as an intermediary component between the induction coil and the target workpiece. This plate mediates the magnetic field distribution by concentrating magnetic flux in specific areas, thereby enabling uniform heating across the workpiece surface while maintaining high heating speed through the induction coil's spiral configuration.
2Productivity
If the induction coil is positioned close to the target object for rapid heating, then heating efficiency is improved, but magnetic field concentration at corners and edges causes overheating
Solution Approach 1:
The magnetic conductive plate is designed with specific geometric features including protrusions and recesses that create locally varied magnetic field distributions. These local structural variations enable different regions of the plate to handle magnetic flux differently, preventing concentration at corners and edges while maintaining overall heating efficiency.
Solution Approach 2:
The magnetic conductive plate introduces a new dimensional element between the coil and workpiece, allowing control of magnetic field distribution in the spatial dimension. By varying the plate's thickness, protrusion heights, and recess depths, the magnetic flux density can be optimized across different areas, eliminating overheating while preserving heating efficiency.
3Manufacturing precision
If a magnetic conductive plate is added to control magnetic field distribution, then heating uniformity is improved, but device complexity increases
Solution Approach 1:
The magnetic conductive plate serves multiple functions simultaneously: it concentrates magnetic flux in required areas, shields certain regions from excessive magnetic field, provides a mounting surface for the induction coil, and acts as a thermal management component. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 method enhances heating efficiency and uniformity by adjusting the magnetic field distribution, preventing overheating at corners and improving heat penetration to the center of the workpiece.
Implementation Method 1
induction heating device capable of using a magnetic conductive plate to control the distribution as well as the strength of the magnetic field induced thereby
Implementation Method 2
current is caused to flow around its surface
Implementation Method 3
a magnetic conductive plate is provided to work in conjunction with an induction coil in a manner that a magnetic field applied upon a target object is deteriorated or enhance with respect to the positioning of the magnetic conductive plate relative to the induction coil
Data Source
Figure 1~2
Figure 3~4
AI summary
An induction heating device (1) and a method for controlling the same are disclosed, in which the induction heating device is composed of an induction coil (10) and a magnetic conductive plate (2). The induction coil (10), being arranged for enabling the same to move relative to a target object (3), is used for heating the target object (3) after being excited, The magnetic conductive plate (2) is disposed at a specific position proximate to the induction coil (10) that can be varied. According to the positioning of the magnetic conductive plate (2), the magnetic conductive plate (2) can be used as a shield for blocking the magnetic field resulting from the excited induction coil (10) when it is being positioned between the induction coil (10) and the target object (3), and the magnetic conductive plate (2) can be used for enhancing the magnetic field when it is being positioned at a side of the induction coil (10) that is away from the target object (3).