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Old 24th July 2008, 03:50 PM   (permalink)
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With LTspice, you can use one of the circuits shown below.
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File Type: png transformer driven rectifier.PNG (16.7 KB, 19 views)
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File Type: asc transformer driven rectifier.asc (4.1 KB, 5 views)
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Old 24th July 2008, 06:59 PM   (permalink)
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How did you make the transformer model?
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Old 24th July 2008, 08:29 PM   (permalink)
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Quote:
Originally Posted by Hero999 View Post
How did you make the transformer model?
It's 3 inductors. K1 specifies the coefficient of coupling. Look up "mutual inductance" in the help section. Also look up "transformer model". I used K=1, which would be an ideal transformer, but in the real world, it will always be somewhat less. K=0 is no coupling.
I chose the primary inductance to be 10 Henries, just to keep the no-load primary current low. Practical values may be lower.
My inductors have series resistance incorporated in them, but you have to load the file into LTspice and right-click on them to see the values. I think I arbitrarily made them all 1 ohm.
As you know, the inductance is proportional to the square of the number of turns, and the voltage ratio is proportional to the turns ratio, so a 100:1 inductance ratio yields a 10:1 voltage ratio.
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Last edited by Roff; 30th July 2008 at 08:34 PM.
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Old 30th July 2008, 04:45 PM   (permalink)
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are there any more circuits in your mind which i should see to improve my electronic skills?
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