Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 189 views

    1 Phase Semi Converter

    Uploaded by

    kkarthiks
    This document describes the operation of a single phase semi-converter circuit with an R-L load. It has two SCRs and two diodes connected in a bridge configuration. There are four modes of operation: 1) SCR 1 conducts providing positive voltage to the load, 2) Freewheeling occurs through the diode when the supply voltage goes negative, 3) SCR 2 conducts providing negative voltage to the load, 4) Another freewheeling mode occurs when the supply voltage becomes positive again. The inductive load stores energy during modes 1 and 3 and provides freewheeling paths during modes 2 and 4.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    1 Phase Semi Converter

    Uploaded by

    kkarthiks
    189 views17 pages
    This document describes the operation of a single phase semi-converter circuit with an R-L load. It has two SCRs and two diodes connected in a bridge configuration. There are four modes of operation: 1) SCR 1 conducts providing positive voltage to the load, 2) Freewheeling occurs through the diode when the supply voltage goes negative, 3) SCR 2 conducts providing negative voltage to the load, 4) Another freewheeling mode occurs when the supply voltage becomes positive again. The inductive load stores energy during modes 1 and 3 and provides freewheeling paths during modes 2 and 4.

    Original Description:

    Original Title

    1 phase semi converter ppt

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document describes the operation of a single phase semi-converter circuit with an R-L load. It has two SCRs and two diodes connected in a bridge configuration. There are four modes of operation: 1) SCR 1 conducts providing positive voltage to the load, 2) Freewheeling occurs through the diode when the supply voltage goes negative, 3) SCR 2 conducts providing negative voltage to the load, 4) Another freewheeling mode occurs when the supply voltage becomes positive again. The inductive load stores energy during modes 1 and 3 and provides freewheeling paths during modes 2 and 4.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    189 views17 pages

    1 Phase Semi Converter

    Uploaded by

    kkarthiks
    This document describes the operation of a single phase semi-converter circuit with an R-L load. It has two SCRs and two diodes connected in a bridge configuration. There are four modes of operation: 1) SCR 1 conducts providing positive voltage to the load, 2) Freewheeling occurs through the diode when the supply voltage goes negative, 3) SCR 2 conducts providing negative voltage to the load, 4) Another freewheeling mode occurs when the supply voltage becomes positive again. The inductive load stores energy during modes 1 and 3 and provides freewheeling paths during modes 2 and 4.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 17

    SINGLE PHASE

    SEMICONVERTER
    (R-L LOAD)

    - AVINASH MISHRA
    INTRODUCTION
     Converter

     Rectifier circuit

    Uncontrolled Rectifier circuit

    Controlled Rectifier circuit


    CLASSIFICATION OF RECTIFIERS
    SEMI CONVERTER
     It is a single quadrant converter.
     It has only one polarity of output
    voltage and current.
     Here two SCRs and two diodes are
    connected in bridge configuration.
     They can be arranged in two confg.
    namely symmetrically & asymmetrical.
    Symmetrical configuration of
    semiconverter
    Asymmetrical configuration of
    semiconverter
    OPERATION WITH R-L LOAD
    MODE 1
     Herewhen SCR 1 is
    turned on.
    OBSERVATION OF MODE 1
     Diode d1 is forward biased,
     Conduction will take place through
    SCR1 & D1,
     Load voltage is Vo=Vm sin ωt

     Here inductive load will store the


    energy in this mode of operation.
     Flow of power is from source to
    load.
    MODE 2
     Here
    at freewheeling
    occurs.
    OBSERVATION OF MODE 2
     Here AC vltg goes to zero & after ∏ it
    becomes negative.
     Hence SCR 1 and diode D1 will turn
    off.
     Since load is inductive it will try to
    oppose the change in crt. Flowing
    through it.
     Self induced vltg is induced.
     This load vltg is negative.
    MODE 3
     Here at SCR 2 & D 2 is ON.
    OBSERVATION OF MODE 3

    Load vltg is positive =


    instantaneous vltg.
    Supply crt is negative.

    Hence load vltg & crt both


    being negative it will store
    energy.
    MODE 4
     Here
    at freewheeling
    occurs.
    OBSERVATION OF MODE 4

     Here AC supply vltg reverses its


    polarity & becomes positive.
     Here also hence freewheeling
    starts through Dfw.
     Load vltg is zero.

     Supply crt is zero.


    SUMMARY

    You might also like