Transformer cascading problem

Replies

• 

  Jeffrey Arulraj

  Any ideas on how this can be removed Guys ?
  
  Real eager to know how this works
• 

  lal

  I didn't get this series coupling. Can you explain a bit more about the connection. And a bit more details too about the magnitude and type of voltage used, step up or step down configuration and so on.
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  Jeffrey Arulraj

  Very simple issue Bud this My friend posted me I don't have much idea about transformers
  
  There seems to be a small phase shift in the op due to this series coupling
  
  The main problem is it is home made and I am not aware of the ratings He used it to step down voltage from 220 to 110 and then to 10V
• 

  Ramani Aswath

  Conqueror

  The main problem is it is home made and I am not aware of the ratings He used it to step down voltage from 220 to 110 and then to 10V

  It does not seem to be a series connection but a true cascade.
  It appears that the secondary of the first is connected to the primary of the second one. Is this correct?
  If so, this is quite common. In India it is common to use a transformer to step down voltage to 110/120 V to match US adapters, which have a 120 V transformer. The secondary goes to the gadget, sometimes after rectification.
  Even if there is a phase shift, so long as the used OP has no reference to IP there should be no problem.
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  Jeffrey Arulraj

  I think I am cleared But is there a way to eliminate this error in phase angle
• 

  lal

  A phase shift doesn't happen in an ideal single phase transformer. But the fact is that nothing in the world is ideal. So we have to expect a small phase shift in the secondary voltage referred to the primary. This phase shift though, will be kept to the minimum possible value.
  
  In the case of a three phase delta-wye transformer, a phase shift of minimum 30 degrees exists.
  
  Still I didn't clearly understand what you meant by series coupling. Can you explain how the connections were made?
  
  Edit: I got it, cascade connection as bioramani sir said. Sorry the page was open for quite long time. Didn't see the new post.
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  Jeffrey Arulraj

  Remember cascading where the op of one stage is fed as the input of the other Similarly He did it
  
  But since he had no reference to the ip the ckt worked very cool other wise serious trouble only