pulse transformer ppt

PREPARED by-

KUMAR GOSWAMI

B.E. (ELECTRICAL) III SEM

RCET (R1)-BHILAI

A pulse transformer is a transfor that is optimized for transmitting rectangular electrical pulse (i.e. pulse with fast and fall time with constant amplitude).

OR

The transformer which handle voltage and current in the form of pulses are called pulse transformer . The use of such transformer is quite common in radar , television , digital computer.

For changing the amplitude of a voltage pulse

For inverting the polarity of a pulse

For affecting the isolation between source and load

For coupling different stage of pulse amplifier.

There are generally two types of pulse transformer they are :-

1) SIGNAL PULSE TRANSFORMER

2) POWER PULSE TRANSFORMER

Another type of pulse transformer is their high voltage pulse transformer. This different transformer are used in digital logic , telecommunication to interface control circuit and power circuit.

The input voltage to pulse transformer is of discontinuous nature . The most important requirement of these transformer is that input pulse at the primary should be reproduced as accurately at its secondary terminal shown a square wave pulse at the input terminal.

The pulse width varies from a fraction of a micro second to about 25 micro seconds. Usually a sufficient time elapses before the next pulse appear.

The wave form of the output voltage at the secondary terminal can be determine through the use of equivalent circuit of the pulse transformer.

cont..

The transformer analysis is usually carried out by dividing its solution in 3 parts:-

Front edge of the pulse

Response during the flat-top

After the terminal of the pulse.

In order to keep the rise time within limits the leakage inductance of the transformer be kept to a minimum.

1.It separates high voltage power circuit from low voltage control circuit.

2.These transformers are high frequency transformer thus size reduces.

3.These transformer can have more than one secondary side so we cant use more device at a time .

This is a high voltage transformer of

Pearson Electronics . It has voltage output

Of 100kV-500kV.This transformer is kept

in high voltage insulating oil

Pulse transformer-Signal pulse transformers are used in digital

circuits, telecommunication etc.

Power pulse transformers are used to isolate power circuit from control circuit.

High voltage pulse transformer-These transformers are used in radar

application, for pulsed power application.

The pulse transformer are efficient in isolation and protection of control circuit and widely used as it takes small area due to small size. This prevents wastage of space. One pulse transformer can have two secondary sides this decreases the number of pulse transformer and also decreases cost and complexity of system.

Dr. P.S. Bimbhra

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