STEVTA -Training of Trainers Project

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Presentation transcript:

STEVTA -Training of Trainers Project Basic Electronics Lecture-2 Diode Applications Dr. Imtiaz Hussain Assistant Professor Mehran University of Engineering & Technology Jamshoro email: imtiaz.hussain@faculty.muet.edu.pk URL :http://imtiazhussainkalwar.weebly.com/

Lecture Outline Half wave Rectifier Full wave Rectifier Bridge Rectifier

introduction A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which is in only one direction, a process known as rectification.

Types of Rectifiers Half wave Rectifier Full wave Rectifier Bridge Rectifier

Half wave rectifier In half wave rectification, either the positive or negative half of the AC wave is passed, while the other half is blocked. Because only one half of the input waveform reaches the output, it is very inefficient if used for power transfer.

Half wave rectifier working animation

Half wave rectification

Output dc voltage calculation The output DC voltage of a half wave rectifier can be calculated with the following two ideal equations

Full wave rectification For single-phase AC, if the transformer is center-tapped, then two diodes back-to-back (i.e. anodes-to-anode or cathode-to-cathode) can form a full-wave rectifier. 

Full wave rectifier using transformer and 2 diodes

Full wave rectification In a circuit with a non - center tapped transformer, four diodes are required instead of the one needed for half-wave rectification.

Full wave rectifier working animation

formula The average and root-mean-square output voltages of an ideal single phase full wave rectifier can be calculated as:

Output voltage of the full wave rectifier Animation

Bridge rectifier A bridge rectifier makes use of four diodes in a bridge arrangement to achieve full-wave rectification.

Bridge rectifier circuit

Bridge rectifier working animation

End of Lecture-2 To download this lecture visit http://imtiazhussainkalwar.weebly.com/ End of Lecture-2