Induction Heating Device Magnetic Flux Guide Part
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Solution Overview
Problem
Conventional induction heating devices face reduced heat generation due to temperature increases in the magnetic flux generating part, which affect the magnetic field strength and efficiency, often requiring complex structures or increased costs to mitigate heat effects.
Innovation Solution
The induction heating device incorporates a magnetic flux guide part with alternating layers of magnetic and insulating materials to direct magnetic flux efficiently to the heating part, reducing eddy currents and maintaining magnetic flux strength while keeping the magnetic flux generating part at a distance, thus suppressing temperature increases and enhancing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the magnetic flux generating part is placed close to the heating part to enhance magnetic flux strength, then heating efficiency is improved, but temperature increases in the magnetic flux generating part reduce magnetic field strength and efficiency
Solution Approach 1:
A magnetic flux guide part is introduced as an intermediary component between the magnetic flux generating part and the heating part. This guide part directs and concentrates magnetic flux toward the heating part while being positioned closer to it, allowing the magnetic flux generating part to remain at a distance and avoid excessive temperature increase.
Solution Approach 2:
The magnetic flux guide part extends in the radial direction from the rotor, creating a three-dimensional flux path that directs magnetic flux efficiently to the heating part. This spatial arrangement allows enhanced heating efficiency without requiring the magnetic flux generating part to be positioned close to the heating part.
2Temperature
If the distance between the magnetic flux generating part and the heating part is increased to reduce temperature effects, then magnetic flux strength at the generating part is maintained, but heating efficiency decreases
Solution Approach 1:
The magnetic flux guide part serves as a mediator that bridges the gap between the magnetic flux generating part and the heating part. It is positioned closer to the heating part and effectively directs magnetic flux over the increased distance, maintaining heating efficiency while allowing the generating part to operate at a cooler temperature.
Solution Approach 2:
The system is segmented into distinct functional components: the magnetic flux generating part, the magnetic flux guide part, and the heating part. This segmentation allows each component to be optimized independently - the generating part for temperature stability and the guide part for flux direction and concentration.
3Temperature
If complex structures or additional components are added to mitigate heat effects, then temperature control is improved, but device complexity and cost increase
Solution Approach 1:
The magnetic flux guide part performs multiple functions simultaneously: it directs magnetic flux, concentrates flux density, and is positioned to optimize the thermal management of the system. This multi-functionality achieves temperature control without requiring multiple separate cooling systems or complex structural modifications.
Solution Approach 2:
The magnetic flux guide part is formed from a composite material comprising magnetic substance parts and insulator parts. This composite structure provides both magnetic flux guidance and thermal insulation properties in a single integrated component, avoiding the need for separate cooling structures.
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 effectively increases heat generation in the heating part while minimizing temperature increases in the magnetic flux generating part, improving heating efficiency and power generation efficiency without complicating the structure or increasing costs.
Implementation Method 1
a magnetic flux generating part provided at the rotor to generate magnetic flux for the heating part
Implementation Method 2
An eddy current heating device described in PTD 1 (Japanese Patent Laying-Open No. 2005-174801) includes a rotor having permanent magnets disposed on the outer periphery thereof and a heating part made of a conductive material
Implementation Method 3
a magnetic flux guide part provided on an opposed surface side of the heating part that is opposed to the magnetic flux generating part to guide the magnetic flux from the magnetic flux generating part to the heating part
Implementation Method 4
The magnetic flux guide part includes magnetic substance parts formed of a magnetic material and insulator parts formed of a non-magnetic and electrically insulating material
Implementation Method 5
The magnetic flux guide part includes magnetic substance parts formed of a magnetic material and insulator parts formed of a non-magnetic and electrically insulating material. The magnetic flux guide part has a structure in which the magnetic substance parts and the insulator parts extend along a direction from the magnetic flux generating part to the heating part and are alternately layered along a circumferential direction
Data Source
AI summary
An induction heating device includes: a rotor having a rotation shaft; a heating part disposed to be opposed to the rotor at a distance; a magnetic flux generating part provided at the rotor to generate magnetic flux for the heating part; a magnetic flux guide part provided on an opposed surface side of the heating part that is opposed to the magnetic flux generating part to guide the magnetic flux from the magnetic flux generating part to the heating part; and a flow passage provided in the heating part to allow a heating medium to circulate. The magnetic flux guide part includes magnetic substance parts. The magnetic flux guide part has a structure in which the magnetic substance parts and the insulator parts extend along a direction from the magnetic flux generating part to the heating part and are alternately layered along a circumferential direction of the heating part.