rotary transformers

Discussion in 'The Projects Forum' started by vishwakrishnan, Nov 27, 2006.

  1. vishwakrishnan

    Thread Starter New Member

    Oct 5, 2006
    5
    0
    Hi all,

    what is a rotary transformers? what are the applications?

    can a rotary transformer be used instead of slip rings in alternators?

    If not why?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    They are not built for power applications. The only use I am aware of is in taking the signal from the rotating head in a VCR.
     
  3. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    I wonder if vishwakrishnan was thinking of a device similar to the 'Dynamotor' used during WW11 as a power supply for the BC348 receiver. It was an electric motor coupled to a generator to supply HT to the receiver.

    http://www.jamminpower.com/main/bc348.jsp
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi Pebe,

    Could be... My old supervisor had one under the seat in his car back in the 60's to make power for his tube linear amp. The lights got dim as it powered up.
     
  5. Johann

    Senior Member

    Nov 27, 2006
    182
    30
    Sometimes an induction motor is called a rotary transformer, because the stator winding can be considered the primary and the rotor bars in the rotor are comnsidered to be the secondary winding(s)
     
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