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In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity. In some motor controllers, an H-bridge is used to control the direction the motor turns.
This is an accepted version of this page This is the latest accepted revision, reviewed on 8 October 2024. Circuit arrangement of four diodes Diode bridge Diode bridge in various packages Type Semiconductor Inventor Karol Pollak in 1895 Electronic symbol 2 alternating-current (AC) inputs converted into 2 direct-current (DC) outputs A hand-made diode bridge. The silver band on the diodes ...
For purposes of illustration, a basic full-wave diode-bridge rectifier is shown in the first stage, which converts the AC input voltage to a DC voltage. Operation
As with single-phase rectifiers, three-phase rectifiers can take the form of a half-wave circuit, a full-wave circuit using a center-tapped transformer, or a full-wave bridge circuit. Thyristors are commonly used in place of diodes to create a circuit that can regulate the output voltage.
The ripple voltage output is very large in this situation; the peak-to-peak ripple voltage is equal to the peak AC voltage minus the forward voltage of the rectifier diodes. In the case of an SS silicon diode, the forward voltage is 0.7 V; for vacuum tube rectifiers, forward voltage usually ranges between 25 and 67 V (5R4). The output voltage ...
A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider ). [ 1 ]
The basic LCC configuration for HVDC uses a three-phase Graetz bridge rectifier or six-pulse bridge, containing six electronic switches, each connecting one of the three phases to one of the two DC terminals. [12] A complete switching element is usually referred to as a valve, irrespective of its construction. Normally, two valves in the bridge ...
selenium rectifiers One type of metal rectifier, though selenium is considered a "metalloid" – formerly much used but now replaced by silicon semiconductors. semiconductor A substance with electrical conductivity between that of insulators and conductors; displays a negative temperature coefficient of resistance, and is also sensitive to light.
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