NDLI: Experimental and Numerical Study of a DC Induction Heater Prototype With an Adjustable Air Gap Structure

Content Provider	IEEE Xplore Digital Library
Author	Ma, J. Sheng, J. Yao, Z.H. Gan, H.Y. Li, H.J. Ai, X.Z. Li, Z.Y. Jin, Z. Hong, Z.
Copyright Year	2002
Description	To improve the poor efficiency of conventional ac induction heaters, which is usually below 50%, a high-temperature superconducting (HTS) dc induction heater has been proposed as a candidate solution. In previous researches, the air gap structure is fixed, which leads to a less controllable magnetic field distribution along the axial direction of billets, hence a less controllable temperature distribution along the same direction. However, an adjustable temperature distribution along the axial direction of billets is required in the aluminum extrusion industry. In order to solve this problem, a novel adjustable air gap structure is proposed and fabricated in our laboratory-scale prototype of the HTS dc induction heater. To validate the method, heating experiments for uniform and gradient temperature distribution were performed with different air gap structures. In addition, a novel adjustment method, i.e., unilateral adjustment, for air gap structure was proposal and tested, which simplified the adjustment method. A finite-element method model of the heater was built to analyze the temperature distribution and the theoretical availability of adjustable air gap structure.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1
Ending Page	5
Page Count	5
File Size	1497928
File Format	PDF
ISSN	10518223
Volume Number	26
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Billets Temperature distribution Electromagnetic heating Iron Temperature measurement Shape Numerical models FEM simulation Adjustable air gap structure DC induction heaters controllable temperature distribution finite-element method (FEM) simulation dc induction heaters
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Design and Experimental Results of a DC Induction Heater Prototype for Aluminum Billets

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