1. INTRODUCTION TOINTRODUCTION TO
INDUCTION HEATING BYINDUCTION HEATING BY
STEAD FAST ENGINEERS PVTSTEAD FAST ENGINEERS PVT
LTDLTD
Stead Fast Engineers provides world class induction
heating and melting solutions for both ferrous and
Non ferrous with a great focus on customization so
that every machine is nothing less than perfect.
http://www.steadfastengg.com/

2. IntroductionIntroduction
What is Induction Heating?

3. IntroductionIntroduction
Why the Induction Heating?
Controlled
features
Energy
conservation
Non-contact
heating
Environmenta
lly friendly
Clean heating
Increase
production
line speeds

4. ApplicationApplication
Industrial application
Housing applications
Medical application
(precision induction heating)

5. Project goalsProject goals
build and formulate a basic knowledge about
induction heating .
deal with the industry requirements for
simplicity ,saving the power consumption,
clean heating and fast productivity.
To build a model for induction surface
hardening machine.
Carry out some testing on the model.

6. Background for Induction HeatingBackground for Induction Heating
Induction Heating
Eddy Current Skin Effect Ferromagnaric
Material

7. Background for Induction HeatingBackground for Induction Heating
Resonance
Parallel resonance
Tank circuit

8. Modeling ofModeling of induction heatinginduction heating

9. Design criteriaDesign criteria

10. Design criteriaDesign criteria
There are two serious problems especially become important
when the material starts heating up.
R ↑
µ ↓

11. The High frequency powerThe High frequency power
supply Designsupply Design
 High frequency power supply
• Low freq. AC supply DC
source.

12. Practical designPractical design
High frequency power supplyHigh frequency power supply
DC - source High frequency AC source
2MBI 50N-120 FUJI IGBT Module

13. Practical designPractical design
 PIC Microcontroller (16F877A)

14. Practical designPractical design
 IGBT DRIVERS…
 Opto-Coupler
 IR2110

15. Practical designPractical design
L6384E

16. Practical designPractical design
BOOTSTRAP CAPACITOR

17. Practical designPractical design
Matching Coil
Ferrite transformer,
Matching circuit such as an L-match
network.

18. Practical designPractical design
 Induction Heating Work coil.
L=3.2 uH
N=4.5 turns
Inner diameter =7cm
 Induction Heating Capacitor.
ceramic capacitor
0.1 uF,450 V
To produce 3uF, 450 V.

19. ProblemsProblems
PIC microcontroller failure.
IR FAILURE.
Opto-coupler Constrains.
Mismatching between PIC
microcontroller and IGBT gate.