SCR Rectifiers?

how does SCR gets syncronised in 3 Phase Half controllerd rectifier

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  • 1 decade ago
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    The control circuit uses the mains for timing and fires (turns on by a pulse applied to gate ) the SCR at some time after that phase has started to be come positive. The same goes for the other phases, timed for the same amount.

    An SCR stays on until the voltage drops to zero at which point it will not conduct until fired again.

    I answer to your question, its synchronized by the mains frequency its controlling

  • 6 years ago

    SCR are unidirectional devices as opposed to TRIACs which are bidirectional (i.e. current can flow through them in either direction). SCRs can be triggered normally only by currents going into the gate as opposed to TRIAC which can be triggered normally by either a positive or a negative current applied to its gate electrode.

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