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18th April 2012, 06:54 PM
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#1 |
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diyAudio Member
Join Date: Mar 2008
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2nd Xfmr with Flyback Converter
I have a flyback converter with the following properties:
- input 230V off line - output +15V (0.6A) / -12V (0.3A) / +200V (0.05A) - actual power approx. 25W - power capacity appr. 75W Now I need an additional 200V (0.05A) output in the same box. The catch: it`s got to be completely isolated from the other HV output. The question is: - can I connect a second flyback xfmr in parallel to the existing xfmr`s primary ? - there should be enough headroom concerning rectifier, switching Mosfet, prim.cap., etc - regulation of the 2nd HV output necessary ? simple shunt reg. or none at all ? since load is pretty constant and not critical. - any unpleasant surprises to be expected ?
__________________
Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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18th April 2012, 07:24 PM
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#2 |
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diyAudio Member
Join Date: Mar 2008
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additional question:
- can I leave unused windings on a flyback converter open / unconnected ? provided that the main ones are loaded and regulated ?
__________________
Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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21st April 2012, 09:13 AM
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#3 |
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diyAudio Member
Join Date: Jun 2004
Location: Warsaw
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Is that current mode or voltage mode converter?
The perfect solution would be to add just another HV secondary, which would not need any further regulation |
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23rd April 2012, 11:06 PM
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#4 |
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diyAudio Member
Join Date: Mar 2008
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current mode
no way to add additional winding just looking for a quick add-on solution w/o building a new xfmr tried it anyway - no serious things happened other than the other secondary voltages dropped somewhat and the additional voltage didn't go over 90V which is only half of what I need. I think that could have been expected ...
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Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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