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    Single Phase Halfwave Controlled Rectifier

    Uploaded by

    josebijo17
    This document describes setting up a single phase halfwave gate-controlled rectifier circuit. The circuit uses an SCR, diodes, potentiometer, and resistors. By varying the potentiometer, the firing angle of the SCR can be controlled between 0 and 90 degrees, which controls the output voltage to the load. The waveforms across the load and SCR are observed on an oscilloscope to verify the circuit is operating as a halfwave controlled rectifier and that the load voltage changes with the firing angle of the SCR.

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    © All Rights Reserved
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    Single Phase Halfwave Controlled Rectifier

    Uploaded by

    josebijo17
    10 views2 pages
    This document describes setting up a single phase halfwave gate-controlled rectifier circuit. The circuit uses an SCR, diodes, potentiometer, and resistors. By varying the potentiometer, the firing angle of the SCR can be controlled between 0 and 90 degrees, which controls the output voltage to the load. The waveforms across the load and SCR are observed on an oscilloscope to verify the circuit is operating as a halfwave controlled rectifier and that the load voltage changes with the firing angle of the SCR.

    Original Description:

    Original Title

    SINGLE PHASE HALFWAVE CONTROLLED RECTIFIER (1)

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    This document describes setting up a single phase halfwave gate-controlled rectifier circuit. The circuit uses an SCR, diodes, potentiometer, and resistors. By varying the potentiometer, the firing angle of the SCR can be controlled between 0 and 90 degrees, which controls the output voltage to the load. The waveforms across the load and SCR are observed on an oscilloscope to verify the circuit is operating as a halfwave controlled rectifier and that the load voltage changes with the firing angle of the SCR.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    10 views2 pages

    Single Phase Halfwave Controlled Rectifier

    Uploaded by

    josebijo17
    This document describes setting up a single phase halfwave gate-controlled rectifier circuit. The circuit uses an SCR, diodes, potentiometer, and resistors. By varying the potentiometer, the firing angle of the SCR can be controlled between 0 and 90 degrees, which controls the output voltage to the load. The waveforms across the load and SCR are observed on an oscilloscope to verify the circuit is operating as a halfwave controlled rectifier and that the load voltage changes with the firing angle of the SCR.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    SINGLE PHASE HALFWAVE CONTROLLED RECTIFIER

    Aim:
    To set up a single phase halfwave gate-controlled rectifier and to observe the waveforms.

    CIRCUIRT DIAGRAM
    Components and equipment
    1. Transformer 230V/6V
    2. SCR TYN 604
    3. Diodes IN 4001
    4. Potentiometer 10K
    5. Resistor RL 100 ohm
    6. Resistor R 1 K ohm
    7. Bread board
    8. CRO
    Theory
    Silicon controlled rectifier (SCR) can be used as a controlled half wave rectifier. The ac voltage
    is applied to the input of the transformer. The secondary voltage i.e., The voltage to be
    rectified is applied to the anode cathode circuit of the SCR through load resistor. Resistance
    triggering circuit is set up to control the firing angle of the SCR. The output voltage is
    controlled by varying the firing angle of SCR. resistance triggering method is used to turn on
    the SCR. Potentiometer, resistor and diode form the SCR triggering circuit. The setting of the
    potentiometer R2 determines the amplitude of the gate voltage. By varying the resistance
    value of potentiometer firing angle can be varied between 0 degree and 90 degrees. The
    output voltage is controlled by varying the firing angle of the SCR.
    During the positive half cycle of the supply voltage, the anode of the SCR is positive w.r.to its
    cathode and until the SCR is triggered by a proper gate pulse, it blocks the flow of the load
    current in the forward direction. When the SCR is fired at an angle α the supply voltage is
    applied to the load and thus the load is directly connected to the ac supply. With a purely
    resistive load the current wave form will be identical to the applied voltage wave form and of
    a magnitude depended on the amplitude of the voltage and the value of load resistance. The
    load current will flow until it is commutated by the reversal of supply voltage.
    During the negative half cycle of the supply voltage, SCR blocks the flow of load current, and
    no voltage is applied to the load.

    Procedure
    Set up the circuit as shown in the figure after testing the components.
    Observe the wave forms across the load and SCR on CRO.
    Vary the potentiometer and observe the change in output wave form.

    RESULT
    Half wave-controlled rectifier is set up and verify the gate control method for changing firing
    angle of SCR also verify that the load voltage is proportional to the firing angle of SCR.
    The wave forms across load resistor and SCR are observed on CRO.

    Waveforms

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