INTRODUCTION TO INTRODUCTION TO INDUCTION HEATING BY INDUCTION HEATING BY

STEAD FAST ENGINEERS PVT STEAD 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/

IntroductionIntroductionWhat is Induction Heating?

IntroductionIntroductionWhy the Induction Heating?

Controlled features

Energy conservation

Non-contact heating

Environmentally friendly Clean heating

Increase production line speeds

ApplicationApplication

Industrial application

Housing applications

Medical application (precision induction heating)

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.

Background for Induction HeatingBackground for Induction Heating

Induction HeatingEddy Current Skin Effect Ferromagnaric

Material

Background for Induction HeatingBackground for Induction Heating

ResonanceParallel resonance Tank circuit

Modeling ofModeling of induction heatinginduction heating

Design criteriaDesign criteria

Design criteriaDesign criteria

There are two serious problems especially become important when the material starts heating up.

R ↑

µ ↓

The High frequency power The High frequency power supply Designsupply Design

High frequency power supply• Low freq. AC supply DC

source.

Practical designPractical designHigh frequency power supplyHigh frequency power supply

DC - source High frequency AC source

2MBI 50N-120 FUJI IGBT Module

Practical designPractical design

PIC Microcontroller (16F877A)

Practical designPractical design

IGBT DRIVERS… Opto-Coupler IR2110

Practical designPractical designL6384E

Practical designPractical designBOOTSTRAP CAPACITOR

Practical design Practical design

Matching CoilFerrite transformer, Matching circuit such as an L-match

network.

Practical design Practical design

Induction Heating Work coil.

L=3.2 uHN=4.5 turnsInner diameter =7cm Induction Heating Capacitor.

ceramic capacitor0.1 uF,450 VTo produce 3uF, 450 V.

ProblemsProblemsPIC microcontroller failure.IR FAILURE.Opto-coupler Constrains.Mismatching between PIC

microcontroller and IGBT gate.