Switching current flow in a transformer primary?

Discussion in 'General Electronics Chat' started by electronice123, May 2, 2009.

  1. electronice123

    Thread Starter Senior Member

    Oct 10, 2008
    302
    0
    I have been wondering lately.

    Is it possible to have a transformer in which the direction of current flow in the primary winding is reversed every other pulse?

    What effect would this have on the transformer, would it's output change polarity every time the current flow through the primary changed direction?

    Would it destroy the transformer?

    How can this be done, I was thinking you could use relays on the primary positive and ground that would switch every other pulse, what other ways could it be done?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    One common way is to feed DC to the primary center tap, and use devices like FET's to alternate the current path through each winding. IBM managed this at 20 KHz with SCR's (unreliably).
     
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