Full wave rectifier using SCR

jojo September 15, 2009 7 Comments

How to make a full wave rectifier using SCR ?

For full-wave rectification two SCRs are connected across the centre taped secondary, as shown in figure-a. The gates of both SCRs are supplied from two gate control supply circuits. One SCR conducts during the positive half cycle and the other during the negative half cycle and thus unidirectional current flows in the load circuit. The main advantage of this circuit over ordinary full-wave rectifier circuit is that the output voltage can be controlled by adjusting the gate current.

SCR Full-Wave Rectifier

SCR Full-Wave Rectifier

Now if the supply voltage v = VMAX sin θ and the firing angle is a, then average voltage output will be given by the expression

Vav = VMAX / ∏ (1 + Cos α)

That is, average voltage output of full-wave rectifier circuit is double of that of half-wave rectifier circuit, which is obvious.

Iav = VMAX / ∏RL (1 + Cos α)

  • farah
    May 1, 2015

    i am going to designe full wave center tapped rectifier and i dont know how to determain the alpha angle in lab i mean in real i know that i can assume it in paper but i dont know how to detemain it in the real experiment

  • krishna
    July 26, 2014

    from the circuit shall i promoted with two outputs…..

  • ranjith
    June 28, 2014

    Please specify the component details

  • thiru
    June 27, 2014

    Design of phase controlled voltage regulator using full wave recitifier and scr.

  • advisor
    September 15, 2012

    Bogus circuit.One has to use 2 batteries to control the Dc. Is it practicable?

  • July 8, 2011

    The ful wave circuit

  • Don
    December 10, 2010

    How do you calculate the resistive and capacitive values to get the firing angle? Is the resistor connected to some sort of voltage?

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