Author Topic: Rectifier works! Regulator.. iffy  (Read 1410 times)

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Offline iamnothimTopic starter

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Rectifier works! Regulator.. iffy
« on: March 16, 2013, 01:51:30 am »
The rectifier works great !

Thanks to David_AVD, IanB, AlfBaz, westfw, and others for your patience and ideas.
I was able to get to the voltage and current I wanted using a Rescton BR31 single-phase bridge rectifier.
The calculations vs. reality was within 8%.  In addition I added a 65000µF "smoothing" cap.

That was very cool to see on the scope, but it tacked on 1V.  (Why?)  I added a 2.5? resistor and bingo.

I spent about 20 minutes with the voltage regulator I bought, but I didn't know what I was doing.
I threw a 2.7? resistor in a loop from out to adj.  It passed voltage.... but it was warming up..
I will look into calculation on the adjustment circuit and see if I can make it work.

I switched transformer mfg.'s from Hammond Mfg. to Triad Magnetics.
Hammond was awful.  I had a DOA, (no continuity on the primary) which Mouser replaced.
But I sent it to Hammond anyway.  They said yes it had a problem, however, "they are all tested at the factory and either Mouser or myself did something."
I also asked for some info on the primary ratios when 120V is applied rather than 115V.   They never answered.

Triad Magnetics   :-+   on the other hand was amazing.  I ordered a couple of their board mounted transformers from Mouser.
Before they arrived I email support and asked the same question about the primaries.  I said it was not a commercial application
and that I am a retired hobbyist.

Less than a day later, Jim Mettler, the Engineering Manager, wrote a one page reply with everything I needed to know.
I was amazed.  The transformers are compact and run very cool.

Before Smoothing Cap


After Smoothing Cap  6.35V DC  and .413A   8)
Warning, This post is litered with mispellings and improper frammer.
 


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