A Tesla coil is a two stage transformer which high voltage, high frequency, power generator, primarily built for conducting experiments and to observe phenomenon associated with alternating electricity.

1. 7TH SEMESTER SEMINAR 2014
1 10-Nov-2014

2. 7TH SEMESTER SEMINAR 2014
Contents
 Introduction
 History
 Block Diagram
 Description
• Power Circuit
• Primary Capacitance
• Secondary Coil
• Top Load
• Primary Coil
 Components
 Applications
 Advantages & Disadvantages
 Conclusion
2 10-Nov-2014

3. 7TH SEMESTER SEMINAR 2014
INTRODUCTION :
• A Tesla coil is a two stage transformer which high voltage,
high frequency, power generator, primarily built for
conducting experiments and to observe phenomenon
associated with alternating electricity.
• With this coil, Tesla was able to generate voltages of such
magnitude, they would shoot out of the apparatus as bolts
of lightning.
3 10-Nov-2014

4. 7TH SEMESTER SEMINAR 2014
HISTORY :
About 100 years ago Nikola
Tesla invented his "Tesla Coil". For
about 70 years hobbists and
engineers alike have been
constructing their own Coils.
Tesla invented his coil with the
intention of transmitting
electricity through the air.
4 10-Nov-2014

5. 7TH SEMESTER SEMINAR 2014
5
BLOCK DIAGRAM:
Ac
Supply
10-Nov-2014
Spark gap
High Voltage
Transformer
High Voltage
Capacitor
Secondary
Primary Coil Top Load
Coil

6. 7TH SEMESTER SEMINAR 2014
6
DESCRIPTION:
POWER CIRCUIT:
10-Nov-2014

7. 7TH SEMESTER SEMINAR 2014
PRIMARY CAPACITANCE :
 The primary capacitor is used
with the primary coil to
create the primary LC circuit.
 A resonate sized capacitor
can damage a NST, therefore
a Larger Than Resonate (LTR)
sized capacitor is strongly
recommended.
 A LTR capacitor will also
deliver the most power
through the Tesla coil.
10-Nov-2014 7

8. 7TH SEMESTER SEMINAR 2014
SECONDARY COIL :
 The secondary coil is used
with the top load to create
the secondary LC circuit.
 Magnet wire is used to wind
the coil.
There’s always a little space
between turns, so the
equation assumes the coil
turns are 97% perfect.
8 10-Nov-2014

9. 7TH SEMESTER SEMINAR 2014
TOP LOAD :
 The top load is used with
the secondary coil to create
the secondary LC circuit.
 Generally a toroid or sphere
shape is used.
 The ring diameter refers to
the widest length from
edge to edge of a toroid
shape.
9 10-Nov-2014

10. 7TH SEMESTER SEMINAR 2014
PRIMARY COIL :
 The primary coil is used
with the primary capacitor
to create the primary LC
circuit.
 The primary coils also
responsible for
transferring power to the
secondary coil.
10 10-Nov-2014

11. 7TH SEMESTER SEMINAR 2014
COMPONENTS :
11 10-Nov-2014

12. 7TH SEMESTER SEMINAR 2014
APPLICATION :
Wireless transmission
and reception
Electrical stage shows & entertainment
Induction coils
Medical X-ray devices
12 10-Nov-2014

13. 7TH SEMESTER SEMINAR 2014
ADVANTAGES :
Allows a wide range of firing rates to be
investigated with a variable speed rotary
spark gap, without encountering beating
and surging.
Allows power throughput to be controlled
by altering the rotary speed.
Charging is slow immediately after the
spark gap fires.
Provides excellent load sharing if a 3
phase rectifier is used at higher powers.
DISADVANTAGES :
More complex circuit is required.
Greater cost.
Large DC smoothing capacitor is needed
unless 3-phase power is used. Such a
capacitor is expensive, and stores lethal
energy.
High voltage, high inductance charging
inductor is needed. This is a specialised
part and may be difficult to obtain.
Requires a 3-phase supply to be most
effective.
Current draw is non-sinusoidal.
13 10-Nov-2014

14. 7TH SEMESTER SEMINAR 2014
CONCLUSION :
After studying and developing the model of TESLA COIL we came to
following conclusion:
 We are able to generate high voltage with high frequency and it
can be used for testing the apparatus for switching surges.
 It can also be used for study of visual corona and ionization of
gases under the electrical stress.
 It can also transmit the electrical power wirelessly up to certain
distance depends upon its ratings.
14 10-Nov-2014

15. 7TH SEMESTER SEMINAR 2014
15 10-Nov-2014