physics investigatory project on full wave rectifier using a center-tap transformer
TRANSCRIPT
Part of Made in India,Design Innovation
Workshop,2015
A Fresh New Experience in Project-‐Making & Learning!
PHYSICS INVESTIGATORY PROJECT ON
FULL-WAVE RECTIFICATION USING A CENTER TAPPED
TRANSFORMER
Centre tapped transformers are used to convert fluctuaCng AC voltage to a constant DC voltage. They are used when a high current is required at a given voltage.
In this project, you will need a breadboard, one resistor, one centre-‐tapped transformer, two diodes, and a few connecCng wires. The transformer has an input voltage of 220V AC and an output voltage of 12-‐0-‐12 V AC. The secondary coil of the transformer is divided into two equal parts; each part acts as a separate coil, and the coils are connected in series. The two individual coils get 12 V each (V1 and V2) as output with respect to the grounded center-‐tap; V1 and V2 are out of phase with each other. On the secondary side, there are three wires which come out of transformer; the middle wire is the centre-‐tap and the other two wires are the phase wires which connect to the diodes. AUer the compleCon of the circuit, the input plug of the transformer is connected to a
220V AC source and the power supply is switched ON. The ‘path of current’ analysis was done in the posiCve and negaCve half cycles of the input voltage. The stepped-‐down AC voltage in the first and the second halves of the secondary coil were measured with respect to the centre tap. The DC voltage across the load resistor was calculated both theoreCcally and experimentally using mulCmeter. The voltages measured in both the cases were compared and the relaCve error was calculated.
Since the current through the load resistor does not change its direcCon during the posiCve and negaCve halves of the AC input, therefore, this arrangement acts like a full-‐wave recCfier. It was noted that the frequency of the recCfied output was twice the frequency of the input supply.
Have a look at what we provide in our Project Kit!
CoolJunk is India's fastest growing DIY (do-‐it-‐yourself) kits company focused on project-‐based learning in science, engineering and technology. Having 20,000 users in India, US, Singapore, Middle East and New Zealand, the CoolJunk kits are known for quality, innovaCon and high producCon value. CoolJunk has been featured in naConal and internaConal journals including Wallstreet, Yourstory, Hindu Business Line, NextBigWhat and was tagged as the coolest Indian start-‐up in IAN Bootcamp-‐2011.
For more projects visit our website: CoolJunk
All tools and components in one box.
Step by step visual instrucCons
Detailed experiment theory
CoolJunkCoolJunkCoolJunk
Follow us on:
CoolJunk