HALF WAVE RECTIFIER

PHYSICS PROJECT ON HALF WAVE RECTIFIER

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CONTENTS Preface Acknowledgement Certificate Introduction Rectifier Circuit Half-Wave Rectifier Peak Inverse Volta Ripple Factor Form Factor Peak Factor Result

PREFACE I feel Immense pleasure to pleasure this project based on “ Half - Wave Rectifier ”. This project is based on academic session 2012-2013.it is hoped that this project will line up to the expectation of the examination and meet the requirements.

Students signature

Acknowledgement I would like to express my special thanks to gratitude to my teacher as well as our principal who gave me a golden opportunity to do this wonderful project on the topic “HALF WAVE RECTIFIER” and also for their valuable guidance and support provided by them to me. He has displayed unique tolerance and understanding at every step . I am thankful to all other teachers of Physics department for their guidance and kind help. I would also like to thank my parents and friends who helped me a lot in finishing this project within the limited time Teacher’s Signature

Student’s Signature

HALF WAVE RECTIFIER

Rectifier Circuit

The arrow on the diode ( ) indicates the direction of the current in the diode • Because of the diode, the alternating current in the load resistor is reduced to the positive portion of the cycle •

Half-Wave Rectifier

• The solid line in the graph is the result through the resistor • It is called a half-wave rectifier because current is present in the circuit during only half of each cycle

THE HALF WAVE RECTIFIER

input vol

Transient Response Half Wave Rectifier

Peak Inverse Voltage When the input voltage reaches its maximum value Vm during the negative half cycle the voltage across the diode is also maximum. This maximum voltage is known as the peak inverse voltage. Thus for a half wave rectifier Let Vi be the voltage to the primary of the transformer. Vi is given by where Vr is the cut-in voltage of the diode.

Ripple Factor

Ripple factor is defined as the ratio of rms value of ac component to the dc component in the output. Ripplefactor

.

Vav the average or the dc content of the voltage across the load is given by

RMS voltage at the load resistance can be calculated as Ripple factor

Efficiency Efficiency, h is the ratio of the dc output power to

Transformer Utilization Factor Transformer Utilization Factor, TUF can be used to determine the rating of a transformer secondary.

In half wave rectifier the rated voltage of the transformer secondary is But actually the RMS current flowing through the winding is only .

Form Factor

Form factor is given by,

Peak Factor Peak factor is given by,

Result: The output waveform may be observed in the waveform viewer.