Fully Controlled Bridge Rectifier

Discussion in 'General Electronics Chat' started by neilio2j, Nov 19, 2007.

  1. neilio2j

    Thread Starter New Member

    Nov 19, 2007
    hi im doing a project at college and im trying to find out how to derive the equations for:

    a) load voltage
    b)supply current

    for a circuit with and without a flywheel diode connected

    can anyone help? im totally stumped with this
  2. bloguetronica

    AAC Fanatic!

    Apr 27, 2007
    What is a flywheel diode?
  3. hgmjr

    Retired Moderator

    Jan 28, 2005
    Can you supply us with a circuit diagram to give us a clear picture of what you are working with?

  4. neilio2j

    Thread Starter New Member

    Nov 19, 2007
    A flywheel diode is often required, because when the current through an inductive load is suddenly broken, a back EMF will build up as the magnetic field breaks down, and if there is no path for the current, a high voltage builds up. The high voltage can damage a transistor or cause arcing in a switch. The flywheel diode is connected in reverse across the load, and provides a path for the current so the magnetic field and current can safely decline.

    there is a copy of the circuit i am working with, sorry i dont know how to post images


    when the flywheel diode is attached it will be connected in parallel across the inductor and resistor

    thanks for your help guys