Lineær PSU - "hæve" 0

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muligt.



konstruktion, hvor man i stedet for at "nedjustere" plus, "opjusterer"  
minus eller 0:
http://ludens.cl/Electron/Ps20/Ps20.html






Karl Erik.

Re: Lineær PSU - "hæve" 0
Den mandag den 7. september 2015 kl. 17.13.41 UTC+2 skrev Karl Erik Christe
nsen:

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n  
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jeg  

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konvertionel PNP highside

-Lasse

Re: Lineær PSU - "hæve" 0
Den 07-09-2015 kl. 19:51 skrev snipped-for-privacy@gmail.com:
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Tak for svar Lasse.









efter "normale" teknikker.


forbundet til PSU minus eller 0.


den terminal der oftest er 0 (nul, stel, ground osv.).

Karl Erik.


Re: Lineær PSU - "hæve" 0
Den mandag den 7. september 2015 kl. 21.00.57 UTC+2 skrev Karl Erik Christe
nsen:
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t en

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re med noget.




adiator.. det var vist 0.2 volt.. men de lugter ...














Re: Lineær PSU - "hæve" 0
Den 07-09-2015 kl. 21:55 skrev Alex:
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Hej Alex - tak for svar.

Forsyningen skulle gerne ende op med at kunne afgive 20+ ampere.








dobbelte. Dog ikke ret meget mindre end en LDO regulator.

det :-)



Karl Erik.


Re: Lineær PSU - "hæve" 0
Den mandag den 7. september 2015 kl. 23.08.46 UTC+2 skrev Karl Erik Christe
nsen:
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istensen:
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set en
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tor

e

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gulere med noget.
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y skal lede 1 ampere eller mere, bliver v forward omkring 0,8 -0,9volt, s

len -radiator.. det var vist 0.2 volt.. men de lugter ...
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j.




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det  
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 opamp..
Jeg kan ikke se der er noget galt ved nol..om det tages her eller der skull

 volt trafo..  
alex

Re: Lineær PSU - "hæve" 0
Den 08-09-2015 kl. 21:42 skrev Alex:










Karl Erik.


Re: Lineær PSU - "hæve" 0
Den tirsdag den 8. september 2015 kl. 22.02.53 UTC+2 skrev Karl Erik Christ
ensen:
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men jeg vil overlade resten til dig
alex

Re: Lineær PSU - "hæve" 0
Karl Erik Christensen wrote:

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volt ripple over ladekondensatoren ved fuld last.




Konstruktionen er en "negativ" regulator hvor vi er mest vant til at se  
"positive" regulatorer, det er muligvis det der forvirrer dig.







i skufferne du vil bruge.






/Lars


Re: Lineær PSU - "hæve" 0
Den 10-09-2015 kl. 08:44 skrev Lars Peter Larsen:





Hej Lars Peter.





mig :-)

Jeg har ingen 741, men der i mod masser af MC33171 opamps, som jeg vil  
bruge.

hvad det betyder :-)

Karl Erik.


Re: Lineær PSU - "hæve" 0
Den 10-09-2015 kl. 10:33 skrev Karl Erik Christensen:

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forsyningens + eller -.

Men leger med tanken om, at forsyne styringen med separat 12volt.


vil :-)

Karl Erik.


Re: Lineær PSU - "hæve" 0
Den 10-09-2015 kl. 13:38 skrev Karl Erik Christensen:
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Karl Erik.


Re: Lineær PSU - "hæve" 0
Den torsdag den 10. september 2015 kl. 14.40.16 UTC+2 skrev Karl Erik Chris
tensen:
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af
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gerne
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 -Lasse

Re: Lineær PSU - "hæve" 0
Den 12-09-2015 kl. 20:12 skrev snipped-for-privacy@gmail.com:

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Tak for indspark Lasse.




udgangen.

Karl Erik.


Re: Lineær PSU - "hæve" 0
Den 10-09-2015 kl. 08:44 skrev Lars Peter Larsen:







Jeg har simuleret modellen i LiveWire, og det ser ud til at fungere  





til omkr. 228vac. Om aftenen stiger den til 232vac.




takt med hoved transformatoren, og dc-udgangen holdes (nogenlunde) stabil.

Karl Erik.


Re: Lineær PSU - "hæve" 0
Karl Erik Christensen wrote:
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Transformatoren var viklet til 16 volt hvilket var i underkanten.


emittererne som udgang i en "positiv" regulator



24 volt - med ensretter og udglatning. Dermed var der kun  



transformator faldt ud.




E-kerne og der er plads.

/Lars

Re: Lineær PSU - "hæve" 0
Den 11-09-2015 kl. 17:45 skrev Lars Peter Larsen:
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Hej Lars.

Min trafo er en stor basse af en ringkerne.

jeg parallelforbinder.









holde en fast afstand mellem plus og minus - her ved at regulere "minus"  
punktet.





plus med en LDO "LM317-type", og MJE2955 som pass-transistorer.



Karl Erik.


Re: Lineær PSU - "hæve" 0

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Opstillingen der er vist i det diagram du linker til er utrolig simpel  







/Lars



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