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What Is Vacuum Tube Rectifires And Its Application In Electronic Devices?
For many applications,we required d.c. supply.Due to an economical proposition,the Electric Power is almost exclusively generated,transmitted and distributed in the form of Alternating Current. For the successful operation of all Electron Tubes and Semiconductor Devices d.c. supply is required.Batteries can not be used for the purpose as they are costly and required frequently replacements. Considering all these problems,it is necessary and also economical to convert available a.c. power supply into d.c. power supply. Conversion of a.c. into d.c. can be achieved by Mechanical Devices also,yet Rectifires are mostly used for the conversion purpose due to its simplicity,
cheapness,efficiency,longer life and noiseless operation. From above description we can define a Rectifier as "An Electronic Device that converts Alternating Current into Direct Current." A Rectifier,changes a.c. supply into d.c. supply by eliminating the negative half-cycle of the Alternating Voltage.It may be thought of as a Switch that closes
a load Circuit during the positive half-cycle of a.c. supply and opens the Circuit during the negative half-cycle. Therefore,A Rectifier provides one-way path for Electric Current,means conduction takes place in one direction only.It is in this way that a Rectifier converts
an Alternating Current into Undirectional Current. Rectification Efficiency:- The ratio of d.c. Power Output to the a.c. Power Input in a Rectifier is known as Rectification Efficiency. Single Phase Vacuum Tube Rectifiers may be classified in two categories,that are as below. 01)Half-Wave Rectifier:- It conducts only on the positive half-cycle of input a.c. voltage. 02)Full-Wave Rectifier:- It conducts on both half-cycles (means positive and negative) of a.c. input voltage.A Full-Wave Rectifier Circuit can supply more d.c. output power than the
equivalent Half-Wave Rectifier. In this post I will cover this much information only,for the detail study,you can wait for another posts or find it out from searching elsewhere. For more details,please visit
http://elctronicsengineering.blogspot.com/ |
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