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Rectifier.

A rectifier is an electrical device that convertsalternating current(AC), which periodically reverses direction,

todirect current(Pulsating DC), which is in only one direction, and the process is known as rectification.

Rectifiers have many uses including as components ofpower suppliesand as detectors ofradio signals.

Rectifiers may be made ofsolid state diodes, silicon-controlled rectifiers, vacuum tube diodes, mercury arc

valves, and other components.

A device which performs the opposite function (converting DC to AC) is known as aninverter.

Half-wave rectification

In half wave rectification, either thepositive ornegative half of the AC wave is passed, while the other half is

blocked. Because only one halfof the input waveform reaches the output, it is very inefficient if used for power

transfer. Half-wave rectification can be achieved with a single diode in a one-phase supply, or with three diodes

in a three-phase supply.

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

Full-wave rectification

A full-wave rectifier converts the whole of the input waveform to one ofconstantpolarity (positive or negative)

at its output. Full-wave rectification converts both polarities of the input waveform to DC (direct current), and

is more efficient. However, in a circuit with a non-center tapped transformer,fourdiodes are required instead of

the one needed for half-wave rectification. (See semiconductors, diode). Four diodes arranged this way are

called a diodebridgeor bridge rectifier.

http://en.wikipedia.org/wiki/Alternating_currenthttp://en.wikipedia.org/wiki/Alternating_currenthttp://en.wikipedia.org/wiki/Alternating_currenthttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Detector_(radio)http://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Solid_state_(electronics)http://en.wikipedia.org/wiki/Solid_state_(electronics)http://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Silicon-controlled_rectifierhttp://en.wikipedia.org/wiki/Vacuum_tubehttp://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Three-phasehttp://en.wikipedia.org/wiki/Center_taphttp://en.wikipedia.org/wiki/Transformerhttp://en.wikipedia.org/wiki/Semiconductorhttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Semiconductorhttp://en.wikipedia.org/wiki/Transformerhttp://en.wikipedia.org/wiki/Center_taphttp://en.wikipedia.org/wiki/Three-phasehttp://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Vacuum_tubehttp://en.wikipedia.org/wiki/Silicon-controlled_rectifierhttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Solid_state_(electronics)http://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Detector_(radio)http://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Alternating_current

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Rectifier.

A rectifier is an electrical device that converts_______________________(AC), which periodically___

________________, to___________________(Pulsating DC), which is in only_______________, and the

process is known as_____________. Rectifiers have many uses including as components of

________________and as detectors of__________________. Rectifiers may be made of_______________

____________________, silicon-controlled rectifiers, vacuum tube diodes, mercury arc valves, and other

components.

A device which performs the opposite function (converting_____________) is known as an____________.

Half-wave rectification

In half wave rectification, either the____________or_______________half of the AC wave is passed, while

the other half is_______________. Because only one______________of the input waveform reaches the

output, it is very_______________if used for power transfer. Half-wave rectification can be achieved with a

________________diode in a one-phase supply, or with____________diodes in a three-phase supply.

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

Full-wave rectification

A full-wave rectifier converts the______________of the input waveform to one of____________polarity

(positive or negative) at its output. Full-wave rectification converts both polarities of the input waveform to DC

(direct current), and is_______________efficient. However, in a circuit with a non-center tapped transformer,

___________diodes are required instead of the one needed for half-wave rectification. (See semiconductors,

diode). Four diodes arranged this way are called a diode__________or bridge___________.

http://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Direct_currenthttp://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Detector_(radio)http://en.wikipedia.org/wiki/Silicon-controlled_rectifierhttp://en.wikipedia.org/wiki/Vacuum_tubehttp://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Three-phasehttp://en.wikipedia.org/wiki/Center_taphttp://en.wikipedia.org/wiki/Transformerhttp://en.wikipedia.org/wiki/Semiconductorhttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Fullwave.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Gratz.rectifier.en.svghttp://en.wikipedia.org/wiki/File:Halfwave.rectifier.en.svghttp://en.wikipedia.org/wiki/Diode_bridgehttp://en.wikipedia.org/wiki/Diodehttp://en.wikipedia.org/wiki/Semiconductorhttp://en.wikipedia.org/wiki/Transformerhttp://en.wikipedia.org/wiki/Center_taphttp://en.wikipedia.org/wiki/Three-phasehttp://en.wikipedia.org/wiki/Inverter_(electrical)http://en.wikipedia.org/wiki/Mercury_arc_valvehttp://en.wikipedia.org/wiki/Vacuum_tubehttp://en.wikipedia.org/wiki/Silicon-controlled_rectifierhttp://en.wikipedia.org/wiki/Detector_(radio)http://en.wikipedia.org/wiki/Power_supplyhttp://en.wikipedia.org/wiki/Direct_current