First cycle
degree courses
Second cycle
degree courses
Single cycle
degree courses
School of Engineering
MATERIALS ENGINEERING
Course unit
ELECTROMAGNETIC PROCESSING OF MATERIALS
INP3051531, A.A. 2017/18

Information concerning the students who enrolled in A.Y. 2016/17

Information on the course unit
Degree course Second cycle degree in
MATERIALS ENGINEERING
IN0523, Degree course structure A.Y. 2014/15, A.Y. 2017/18
N0
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Number of ECTS credits allocated 6.0
Type of assessment Mark
Course unit English denomination ELECTROMAGNETIC PROCESSING OF MATERIALS
Department of reference Department of Industrial Engineering
Mandatory attendance No
Language of instruction English
Branch PADOVA
Single Course unit The Course unit can be attended under the option Single Course unit attendance
Optional Course unit The Course unit can be chosen as Optional Course unit

Lecturers
Teacher in charge FABRIZIO DUGHIERO ING-IND/31

ECTS: details
Type Scientific-Disciplinary Sector Credits allocated
Educational activities in elective or integrative disciplines ING-IND/31 Electrotechnics 6.0

Mode of delivery (when and how)
Period First semester
Year 2nd Year
Teaching method frontal

Organisation of didactics
Type of hours Credits Hours of
teaching
Hours of
Individual study
Shifts
Lecture 6.0 48 102.0 No turn

Calendar
Start of activities 25/09/2017
End of activities 19/01/2018

Syllabus
Prerequisites: None
Target skills and knowledge: Knowledge about the main characteristics of industrial heating systems that make use of electric energy.
Knowledge of the phenomena which occur in the use of low/medium/high frequency currents
Examination methods: Oral examination. The examination can be splitted into two parts
Course unit contents: ARC FURNACES
Introduction. Types of arc furnaces.
Main electrical systems of an arc furnace, in particular the furnace transformer, the secondary high current circuit.
Operating characteristics.
Materials used in a furnace.

RESISTORS FURNACES (Indirect)
Notes about the types of ovens resistors
Dimensioning criteria of the walls of the oven chamber.
Industrial applications. Special applications.

DIRECT HEAT RESISTANCE

Introduction
DC current Heating
Electrical parameters
Thermal transient in a cylindrical body heated by constant specific power density and with no superficial losses
Variations of the characteristics of the material during the heating
AC current Heating
Distributions of current density and power
Thermal transient in a cylindrical body with variable specific power and in the absence of heat losses towards the environment
Thermal efficiency and intensity of the magnetic field H0
Heating of steel bars
Influence of the electrical parameters of the installation in the heating of the steel bars
Compensation circuit and load balancing
Heating tubes and pipes


INDUCTION HEATING

Introduction
Distributions of induced currents and powers within a cylindrical body by a longitudinal magnetic field
Induced power in a cylinder and the equivalent impedance of the inductor-load system
Specific power per unit surface
Total flux and impedance Ze0
Half-plane equations
Hollow cylinder heated from the inside
Internal resistance and reactance of the induction coil
Electrical efficiency of the inductor-load system
Quality Factor and power factor
Transient thermal in a cylindrical body
Variations of the characteristics of the material
Methods for calculation of the 'short' inductors
Analytical methods
Numerical Methods
Industrial applications of induction heating
Surface hardening medium and high frequency
Heating for hot working of metals
Melting Furnaces
Crucible induction furnaces
Induction furnaces to channel

HIGH FREQUENCY DIELECTRIC HEATING AND MICROWAVE HEATING

introduction
Characteristics of dielectric materials
Choice of frequency
Microwave heating
Industrial applications
Planned learning activities and teaching methods: Traditional frontal lecture
Numerical laboratory
Textbooks (and optional supplementary readings)
  • S. Lupi, Appunti di Elettrotermia. --: Progetto, --. Cerca nel catalogo
  • V. Rudnev, Handbook of Induction Heating. --: Marcel Dekker Inc., --. Cerca nel catalogo
  • S.LUPI, Fundamentals of Electroheat Electrical Technologies for Process Heating. --: SPRINGER, 2017. 978-3-319-46014-7