This chapter of the free Fluxtrol induction heating course walks through fluxtrol induction technology in 11 slides. View the slides below, or skim the outline and slide text.
Chapter outline
- 0. Introduction
- Course Contents
- Introduction
- Considerations
- History of Induction Heating
- Specific Features of Induction Heating
- Advantages of Induction Heating
- Major Applications of Induction Heating
- Latest Achievements in Induction
Slide text
0. Introduction
- Basics of Induction Technique and Magnetic Flux Control by. Dr. Valentin Nemkov
Course Contents
- INTRODUCTION Ia.
- BASIC OF INDUCTION TECHNIQUE -PART 1 Ib.
- BASIC OF INDUCTION TECHNIQUE -PART 2 II.
- INDUCTION INSTALLATIONS III.
- INDUCTION COIL STYLES I V.
- COMPUTER SIMULATION V.
- MAGNETIC FLUX CONTROL VI.
- APPLYING FLUXTROL TO INDUCTION COILS VII.
- CASE STORIES VIII. HISTORICAL OVERVIEW GLOSSARY
Introduction
- This Training Course is developed for people with different technical levels (technology users, designers, coil manufacturers, businessmen etc.) for better understanding of:
- How induction heating works
- Equipment used for induction heating applications
- How to design optimal processes and induction coils using computer simulation
- The benefits of using magnetic flux controllers (concentrators)
- Proper material selection and fabrication
- The application of Fluxtrol controllers to induction coils
- What results have been achieved in selected applications (case stories) It is not possible to describe in a short course all the features and numerous applications of induction heating.
- The main emphasis will be placed on the theory, understanding and practice of magnetic flux control in induction heating systems.
Considerations
- Induction technique is a complicated method involving Electrical, Magnetic and Thermal phenomena
- Heating intensity and temperature distribution depend upon many factors (frequency, part size and shape, material properties, operating conditions) and may vary during the process of heating
- Magnetic Flux Controllers effect not only the induction coil performance but influence (improve) operation of the whole induction installation
- Induction technique has its own language, which the user needs to know for adequate communication with customers – see Glossary See Glossary
History of Induction Heating
- Induction heating is based on fundamental works within the field of Electromagnetism and on scientific and technical contributions of a number of individuals in USA,Russia, Germany, France and other countries.
- Historical knowledge of induction heating allows the reader to see the role this unique technology has played within the industrial revolution and equipment development
- Some ideas of this pioneering period (50-70 years ago) have been implemented in practice only recently due to a new level of industrial demand, development of advanced materials, machines and control systems
- A short History Overview composed by Professor Alfred Muehlbauer (Hanover University, Germany)may be found in a separate file See Historical Overview
Specific Features of Induction Heating
- Heat generation occurs inside the part
- Heating is contactless
- Method can provide very high power densities
- Heating may be highly selective in the depth and along the surface
- Any processing atmosphere (air, protective gas, vacuum)
- Very high temperature may be created
- Stand-by losses of equipment are very low
- Fast start-up
- Heating may be easily programmed and automated
- No contamination of treated material may be provided (important for medical material, semiconductors etc.!)
- No pollution of surrounding space
Advantages of Induction Heating
- Short heating cycles and high production rates
- Better metallurgical results due to fast and clean heating
- Energy savings due to selectivity and high efficiency
- Good control and repeatability
- Minimal or no surface oxidation and decarburization
- Lower distortions
- Favorable for industrial environment (in-line heating, no pollution, “push button” performance)
- Some processes may not be accomplished other than by induction
Major Applications of Induction Heating
- HEATING TREATING FORMING & FORGING MELTING WELDING BRAZING & SOLDERING BONDING SHRINK-FITTING INDUCTIVELY COUPLED PLASMA CRYSTAL GROWTH
Latest Achievements in Induction
- Heating Technique
- Compact and efficient transistor power supplies with wide frequency range operation
- Intelligent control and monitoring systems
- Simultaneous dual frequency hardening
- Robotic induction installations
- Computer simulation technology and CAD of induction processes and coils
- Magnetic flux control techniques and concentrator materials