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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Big can of worms! posted by Al Sekela on April 25, 2007 at 11:10:21:
Hi.Since the core built up a torroid iron is gapless (vs gapped EI core), very little magnetic flux leakout, therefore low low leakage inductance.
But it is not a all blessing. On the momnet of switching on the power iron, the low primary winding DCR is so low plus low low leakage inductance will generate a hugh incoming current surge.
So for torroids, it is always good practice to get a surge current limiter upstream of the primary winding. If not, at leasst a slow-blow fuse.
Plus it is next to zero DC offset tolerance, which is not at all a healthy feature for push-pull O/P transformers where DC offset is so common due to not perfectly matched O/P power tubes.
Plus EMI/RFI flash-over from the primary to the seocnding winding is much more ready in toroidals.
c-J
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Follow Ups
- Yes, torroids are NOT all angel. - cheap-Jack 12:16:41 04/25/07 (0)
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