3. INDRODUCTION
+The basic principle of induction heating have been understood
and applied to manufacturing since 1920 s during 2^nd world
war
+It is method of raising the temperature of an electrically
conductive material by subjecting it to an alternating em field
+It is a contactless electric heating process
+It is a high frequency heating process
4. Continues...
+The heat generated in the material is proportional to the frequency
and intensity of the magnetic field, the material's electrical
conductivity, and its magnetic permeability. Induction heating allows
for precise temperature control and is highly efficient, as it does not
require any physical contact between the heating element and the
material being heated, reducing energy loss.
+Induction heating is used in a variety of industries, including
automotive, aerospace, and medical device manufacturing, where it
is used to improve the properties of materials, reduce production
time, and improve efficiency.
7. FARADAY'S LAW
+First law: It states that whenever there is a change in
magnetic flux associated with a coil, EMF is induced in
that coil.
+ Second law: It states that the magnitude of EMF
induced in the coil is directly proportional to the rate of
change of magnetic flux associated with that coil.
8. CONCEPT OF JOULE HEATING
+Joule heating is the physical effect
by which the pass of current
through an electrical conductor
produces thermal energy.
9. HOW ITS WORK
+ The induction heating process works by creating a strong magnetic field using an alternating
current (AC) that flows through a coil of copper wire. This coil is called an induction coil, and it
is usually made of copper tubing or wire that is wound into a spiral shape. When the alternating
current flows through the coil, it creates an oscillating magnetic field that passes through the
workpiece placed inside the coil.
+ As the magnetic field passes through the conductive material, it induces an electrical current, or
eddy current, in the material. This current flows in a circular pattern, generating heat due to the
resistance of the material. The heat generated by the eddy current is proportional to the
resistance of the material and the intensity of the magnetic field.
The heating process can be controlled by adjusting the frequency and intensity of the
alternating current, as well as the distance between the coil and the workpiece. By adjusting
these parameters, the temperature of the workpiece can be precisely controlled, making
induction heating a versatile and efficient heating method
10.
11.
12. HEATING MODE
+STATIC HEATING
+Workpiece is placed into an induction heating coil for a given
period of time and set the amount of power is supplied
+CONTINUOUS HEATING
+Workpiece is moved in a continuous motion through one or
more induction heating coil
14. INDUCTION COOKING
+The circulating current in the metal pan on the top of the
induction coil directly heat the pan
+copper bottomed pan aluminium pan and other non ferrous
pans are generally unsuitable hey
+Induction cooking is highly efficient, with up to 90% of the
energy produced being transferred to the cookware, compared
to only 50% for gas and 65% for traditional electric stovetops.
The heat is also highly responsive, with the ability to adjust
temperatures quickly and accurately.
15.
16. INDUCTION SEALING
+Is a non contact method of heating a metallic disk
to hermatically seal the top of plastic and glass
container
+Reason to use induction sealing
+Leak prevention ,freshness
retention,sustaniabilty
17.
18. MILK PASTEURIZATION
+Rise milk temperature faster than traditional method
+destruction of total bacterial Load was 99.5 percentage
+coliform and Escherichia count have been 1/10 of traditional
method
+fouling was not produced due to the fast heat transfer
20. ADVANTAGE
+ Fast heating: Induction heating is a rapid process that can heat materials quickly and
efficiently. The heat is generated directly in the material, so there is no need for a heat
transfer medium, such as air or water.
+ Precise control: Induction heating provides precise control over the heating process,
allowing for accurate temperature control and heating profiles. This is particularly useful in
applications where precise temperature control is critical, such as in metallurgy and
materials science.
+ Energy efficiency: Induction heating is an energy-efficient process that minimizes heat
loss and can reduce energy consumption compared to other heating methods. This is
because the heat is generated directly in the material, rather than being transferred
through a medium, which can result in significant heat loss.
21. Continues....
+ Clean process: Induction heating is a clean process that does not produce emissions,
such as greenhouse gases, making it an environmentally friendly option.
+ Low maintenance: Induction heating equipment is relatively low maintenance and has a
long service life. This is because the equipment does not have any moving parts that
require regular maintenance or replacement.
+ Versatility: Induction heating can be used for a wide range of applications, including
heating metals, plastics, and glass, making it a versatile process. It is particularly useful in
applications where traditional heating methods, such as flame or oven heating, are not
suitable.
22. LIMITATIONS
+Material limitations: Induction heating is only effective on materials
that are electrically conductive, which means that non-metallic
materials cannot be heated using this method.
+Depth of heating: Induction heating is not suitable for deep heating of
materials. The depth of heating is limited by the frequency of the
electromagnetic field and the material's electrical conductivity.
+Equipment cost: Induction heating equipment is often more
expensive than other heating methods, such as gas heating or
resistance heating.
23. Continues..
+ Power consumption: Induction heating requires a significant amount of power to operate.
This can result in high energy costs.
+ Safety concerns: Induction heating can pose a safety risk due to the high voltages and
currents involved. Proper training and safety measures must be in place to prevent
accidents.
+ Design complexity: Induction heating requires careful design and optimization of the
electromagnetic coil, power supply, and other components. This can add complexity to the
system and increase the design and manufacturing costs.
24. CONCLUSION
+Induction heating is a process that involves heating a conductive
material by inducing an electromagnetic field within it. The process is
efficient, fast, and has a wide range of applications, including in the
manufacturing industry, metallurgy, and material science. Induction
heating is a non-contact heating process that offers several
advantages over traditional heating methods, including improved
energy efficiency, precise temperature control, and reduced
processing time. It is a reliable and versatile heating method that can
be used to heat a wide range of materials and is increasingly being
used in various industrial processes.
25. REFERENCE
+How Induction Heating Works - Ultraflex Power Technologies:
https://ultraflexpower.com/how-induction-heating-works/
+Induction Heating Principles - GH Induction: https://www.gh-
ia.com/en/induction-heating/principles/
+Induction Heating - ScienceDirect:
https://www.sciencedirect.com/topics/engineering/induction-heating
+Induction Heating Theory and Applications - ASM International:
https://www.asminternational.org/documents/10192/2049770/06691
G_Chapter_1.pdf/30f1ad81-cc0b-4d4d-a4ee-7f24c6d72b7d
