Transverse Flux Induction Heating With Bridge-Coupled Partial Cores
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Solution Overview
Problem
Conventional transverse flux induction heating devices face challenges in simultaneously suppressing core temperature increase and maintaining alternating magnetic field magnitude for efficient heating of thin conductor sheets, leading to uneven temperature distribution and reduced heating efficiency.
Innovation Solution
A transverse flux induction heating device with a pair of coils and cores arranged in a specific configuration, including partial cores and bridge cores, to maintain magnetic coupling and alternating magnetic field strength while reducing core temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the core is divided into multiple partial cores to suppress core temperature increase, then core temperature is reduced, but the alternating magnetic field magnitude decreases leading to reduced heating efficiency
Solution Approach 1:
The core is divided into multiple partial cores arranged in the width direction, with gaps between them. This segmentation reduces the core temperature by decreasing the total core loss and improving heat dissipation, while the magnetic coupling between partial cores maintains the alternating magnetic field magnitude for effective heating
Solution Approach 2:
Bridge cores are introduced as intermediary elements to magnetically couple the partial cores. The bridge cores maintain the alternating magnetic field magnitude across the segmented core structure, ensuring heating efficiency is preserved despite the core division for temperature control
2Productivity
If a single integrated core is used to maintain strong alternating magnetic field, then heating efficiency is improved, but core temperature increases significantly
Solution Approach 1:
The integrated core is segmented into multiple partial cores with gaps between them. This reduces core temperature by decreasing total core loss and improving heat dissipation surface area, while magnetic coupling through bridge cores maintains the field strength needed for heating efficiency
3Adaptability or versatility
If the width of the core in the width direction is increased to process wider conductor sheets, then adaptability is improved, but core loss increases leading to higher temperature
Solution Approach 1:
The core width is increased by adding more partial cores in the width direction rather than enlarging a single core. The gaps between partial cores reduce total core loss and improve heat dissipation, allowing wider conductor sheet processing while controlling temperature
Solution Approach 2:
Different regions of the core (partial cores) are independently arranged with gaps between them, allowing localized heat dissipation and reduced core loss in each segment while maintaining overall width capability for processing wider sheets
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 device achieves uniform temperature distribution and improved heating efficiency by effectively managing core temperature and magnetic field strength, addressing the limitations of existing technologies.
Implementation Method 1
The induction heating device imposes an alternating magnetic field generated from a coil on a conductor sheet. Accordingly, an eddy current is induced in the conductor sheet by electromagnetic induction. The conductor sheet is heated by Joule heat based on the eddy current.
Implementation Method 2
The conductor sheet is heated by Joule heat based on the eddy current.
Implementation Method 3
the set of cores has at least one bridge core capable of being magnetically coupled to at least two partial cores out of the partial cores
Data Source
AI summary
Coils (230, 330) are respectively arranged on a front side and a rear side of a planned conveyance plane (CP). Main cores (211, 311), edge cores (212, 213, 312, 313), and bridge cores (220a, 220b, 320a, 330b) are arranged with respect to the coils (230, 330). The bridge cores (220a, 220b, 320a, 330b) are arranged on a back side of the main cores (211, 311) and the edge cores (212, 213, 312, 313). The main cores (211, 311) and the edge cores (212, 213, 312, 313) can be magnetically coupled by using the bridge cores (220a, 220b, 320a, 320b).