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Old 30th May 2012, 09:51 PM   #21
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Originally Posted by Rundmaus View Post
What you call 'horse ****' is basic electrodynamics / transformer theory. Please go back to 'Start' and read the basics.

A closed conductive loop around the core (formed by the bolt and the conductive chassis) will act as a single, low-resistance turn, effectively shorting out the transformer, as AndrewT and SY stated correctly.

Andreas
...and you don't understand basic magnetic theory. The effect you are so concerned about only concerns magnetic materials, like steel. So, maybe you should re-read transformer theory again.
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Old 30th May 2012, 09:54 PM   #22
SY is offline SY  United States
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No, an unintentional shorted turn only needs to be conductive to cause a major (smoke, flames) problem. If a nonmagnetic conductive mounting bolt touches top and bottom of the case, BOOM. Basic magnetic theory.
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Old 30th May 2012, 09:56 PM   #23
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dirkwright,

You really need to rethink.
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Old 30th May 2012, 10:12 PM   #24
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...and you don't understand basic magnetic theory. The effect you are so concerned about only concerns magnetic materials, like steel. So, maybe you should re-read transformer theory again.
And how comes that a voltage appears in the non magnetic secondary copper wire windings?
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Old 30th May 2012, 10:26 PM   #25
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Originally Posted by Groundloops View Post
And how comes that a voltage appears in the non magnetic secondary copper wire windings?
Because the copper winding is wrapped around a STEEL core.
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Old 30th May 2012, 11:26 PM   #26
SY is offline SY  United States
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So is the accidental shorted turn. Will a sketch help?
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Old 30th May 2012, 11:26 PM   #27
pooge is offline pooge  United States
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Dirk, it's not conducting magnetic energy. The "magnetic energy" induces a current into the shorted turn possibly formed by the bolt and the other, i.e., chassis elements. It's the same effect as if you took the ends of the secondary winding and connected them together.
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Old 31st May 2012, 02:14 AM   #28
godfrey is offline godfrey  South Africa
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Originally Posted by SY View Post
Will a sketch help?
Only if somebody looks at it and thinks about it. What are the odds of that happening? I reckon the closest you'll get is a "Whatever, I don't care!" response.
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Old 31st May 2012, 03:07 AM   #29
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Originally Posted by pooge View Post
Dirk, it's not conducting magnetic energy. The "magnetic energy" induces a current into the shorted turn possibly formed by the bolt and the other, i.e., chassis elements. It's the same effect as if you took the ends of the secondary winding and connected them together.
Yeah, thanks. I finally figured it out. Everyone else just said "look it up". That's one way to really **** me off.
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Old 31st May 2012, 11:45 AM   #30
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Only if somebody looks at it and thinks about it. What are the odds of that happening? I reckon the closest you'll get is a "Whatever, I don't care!" response.
I'm sorry you feel that way. One thing that is clear to me is that if someone really knows what they are talking about, they can explain it in a clear, precise, and succinct way. No one did this up to the one post where I finally understood what everyone was talking about. It appears to me that they do not understand what they are talking about if they can't explain it. So, when someone says "just go look it up". or "you're wrong", or "that's the way it is", then that really doesn't help me at all and it just becomes more and more frustrating for me to try to understand.
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