A Computer program for the simulation of induction heating
Endüksiyonla ısıtma simulasyonu için bir bilgisayar programı
- Tez No: 45654
- Danışmanlar: Y.DOÇ.DR. ENGİNER UNGAN
- Tez Türü: Yüksek Lisans
- Konular: Elektrik ve Elektronik Mühendisliği, Electrical and Electronics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1995
- Dil: İngilizce
- Üniversite: Dokuz Eylül Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 62
Özet
ABSTRACT A COMPUTER PROGRAM FOR THE SIMULATION OF INDUCTION HEATING Alper BALÇIK M.S. in Electrical and Electronics Engineering Supervisor : Asst. Prof. Dr. Erginer UNGAN September 1995, 62 pages Electromagnetic induction discovered by Michael Faraday in 1 83 1 has become the basis of all induction heating. Since induction heating techniques finds a multitude of uses in industrial processes, the importance of induction heating has been increased gradually nowadays. This thesis deals with the analysis and die design of induction heating work coils used in through heating applications. The equivalent circuit formulation developed by R. M. Baker has been found to give quite adequate results in the industrial design of work coils. The equivalent circuit method is evaluated in two steps, i.e. above and below the Curie temperature. This method, however, requires many empirical data accumulated over many years and assumes constant material properties throughout the work-piece. The wrong choice of this datas could effect the results considerably. The analysis of the induction through heating of cylindrical work-pieces is performed by solving the governiug Maxwell's field equations and the one-dimensional thermal field equations whose solutions are Bessel functions in a transient regime using numerical techniques. In the method, the work-piece is divided into TV concentric cylinders. The changes in the physical parameters, i.e. thermal conductivity, specific heat, electrical resistivity and magnetic permeability, due to field variations in time, are taken into account within each concentric cylinder. The magnetic field strength and the current density distributions of every cylinder are evaluated at discrete time steps of the total heatingperiod. The method, therefore, makes it possible to take into account the changes in the temperature dependent physical properties of the work-piece yielding more accurate results than conventional techniques. Key words : Induction heating, work coil, work piece, coil design, equivalent circuit, magnetic field distribution
Özet (Çeviri)
ABSTRACT A COMPUTER PROGRAM FOR THE SIMULATION OF INDUCTION HEATING Alper BALÇIK M.S. in Electrical and Electronics Engineering Supervisor : Asst. Prof. Dr. Erginer UNGAN September 1995, 62 pages Electromagnetic induction discovered by Michael Faraday in 1 83 1 has become the basis of all induction heating. Since induction heating techniques finds a multitude of uses in industrial processes, the importance of induction heating has been increased gradually nowadays. This thesis deals with the analysis and die design of induction heating work coils used in through heating applications. The equivalent circuit formulation developed by R. M. Baker has been found to give quite adequate results in the industrial design of work coils. The equivalent circuit method is evaluated in two steps, i.e. above and below the Curie temperature. This method, however, requires many empirical data accumulated over many years and assumes constant material properties throughout the work-piece. The wrong choice of this datas could effect the results considerably. The analysis of the induction through heating of cylindrical work-pieces is performed by solving the governiug Maxwell's field equations and the one-dimensional thermal field equations whose solutions are Bessel functions in a transient regime using numerical techniques. In the method, the work-piece is divided into TV concentric cylinders. The changes in the physical parameters, i.e. thermal conductivity, specific heat, electrical resistivity and magnetic permeability, due to field variations in time, are taken into account within each concentric cylinder. The magnetic field strength and the current density distributions of every cylinder are evaluated at discrete time steps of the total heatingperiod. The method, therefore, makes it possible to take into account the changes in the temperature dependent physical properties of the work-piece yielding more accurate results than conventional techniques. Key words : Induction heating, work coil, work piece, coil design, equivalent circuit, magnetic field distribution
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