7T H

SEM ESTER SEM INAR 2014

110-Nov-2014

Contents Introduction History Block Diagram Description

• Power Circuit• Primary Capacitance• Secondary Coil• Top Load• Primary Coil

Components Applications Advantages & Disadvantages Conclusion

7T H

SEM ESTER SEM INAR 2014

210-Nov-2014

INTRODUCTION :

• A Tesla coil is a two stage transformer which high voltage,high frequency, power generator, primarily built forconducting experiments and to observe phenomenonassociated with alternating electricity.

• With this coil, Tesla was able to generate voltages of suchmagnitude, they would shoot out of the apparatus as boltsof lightning.

7T H

SEM ESTER SEM INAR 2014

310-Nov-2014

HISTORY :

About 100 years ago NikolaTesla invented his "Tesla Coil". Forabout 70 years hobbists andengineers alike have beenconstructing their own Coils.

Tesla invented his coil with theintention of transmittingelectricity through the air.

7T H

SEM ESTER SEM INAR 2014

410-Nov-2014

7TH

SEMESTER SEMINAR 2014

5

BLOCK DIAGRAM:

10-Nov-2014

Ac

SupplySpark gap

High Voltage Transformer

High Voltage Capacitor

Primary Coil Top LoadSecondary

Coil

7TH

SEMESTER SEMINAR 2014

6

DESCRIPTION:POWER CIRCUIT:

10-Nov-2014

7TH

SEMESTER SEMINAR 2014

10-Nov-2014 7

PRIMARY CAPACITANCE : The primary capacitor is used

with the primary coil to create the primary LC circuit.

A resonate sized capacitorcan damage a NST, thereforea Larger Than Resonate (LTR)sized capacitor is stronglyrecommended.

A LTR capacitor will alsodeliver the most powerthrough the Tesla coil.

7TH

SEMESTER SEMINAR 2014

810-Nov-2014

SECONDARY COIL :

The secondary coil is used with the top load to create the secondary LC circuit.

Magnet wire is used to windthe coil.

There’s always a little spacebetween turns, so theequation assumes the coil turns are 97% perfect.

7TH

SEMESTER SEMINAR 2014

910-Nov-2014

TOP LOAD :

The top load is used withthe secondary coil to createthe secondary LC circuit.

Generally a toroid or sphereshape is used.

The ring diameter refers to the widest length from edge to edge of a toroid shape.

7TH

SEMESTER SEMINAR 2014

1010-Nov-2014

The primary coil is usedwith the primary capacitorto create the primary LC circuit.

The primary coils alsoresponsible for transferring power to the secondary coil.

PRIMARY COIL :

7TH

SEMESTER SEMINAR 2014

1110-Nov-2014

COMPONENTS :

7TH

SEMESTER SEMINAR 2014

1210-Nov-2014

APPLICATION :

Wireless transmission and reception

Induction coils

Electrical stage shows & entertainment

Medical X-ray devices

7TH

SEMESTER SEMINAR 2014

1310-Nov-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.

7TH

SEMESTER SEMINAR 2014

1410-Nov-2014

After studying and developing the model of TESLA COIL we came tofollowing conclusion:

We are able to generate high voltage with high frequency and itcan be used for testing the apparatus for switching surges.

It can also be used for study of visual corona and ionization ofgases under the electrical stress.

It can also transmit the electrical power wirelessly up to certaindistance depends upon its ratings.

CONCLUSION :

7TH

SEMESTER SEMINAR 2014

1510-Nov-2014