Good day folks. Digging around my junk pile at work I found a couple of UPS transformers and I thought they might be handy for putting together a lab PSU, which we don't have around here >_>. A while back, I built one at home using a similar transformer and a DC-DC converter module from China. Works alright, does the job...I bet it certainly wouldn't win any awards for best output stability or ripple on the output, but it is there when you need it to charge some batteries or run unsafe sh!t with current limit.
Now I want to do the same thing with these guys but instead of having one output, I was thinking of having two independent DC-DC modules...a bit pricey but worth it IMO, especially for a DIY geek like me. Sounds simple enough: two transformers, two bridge rectifiers, a couple of caps, all nice and separate, but then that got me thinking about a couple of things:
First, what if I wire the secondaries in series like in the schematic I drew...I know I know, there's no reason why I'd ever need an unregulated 96v output but if I have the option, why not. Would it work the way I drew it in addition to powering the modules ?
Also, should I connect the grounds of the outputs together ? On these DC-DC modules, the ground is common between input and output anyway, so I would essentially tie the negative outputs of the bridge rectifiers together and also to chassis GND while I'm at it, since it's going to have a metal case and if I remember my SMPSs, the chassis is almost always GND.
Any thoughts ? I'd love to have a high voltage regulated PSU as well (which I'm aware is not possible with the current setup), but none of the modules out there go any higher than 50v-60 MAX. Cheers.
Now I want to do the same thing with these guys but instead of having one output, I was thinking of having two independent DC-DC modules...a bit pricey but worth it IMO, especially for a DIY geek like me. Sounds simple enough: two transformers, two bridge rectifiers, a couple of caps, all nice and separate, but then that got me thinking about a couple of things:
First, what if I wire the secondaries in series like in the schematic I drew...I know I know, there's no reason why I'd ever need an unregulated 96v output but if I have the option, why not. Would it work the way I drew it in addition to powering the modules ?
Also, should I connect the grounds of the outputs together ? On these DC-DC modules, the ground is common between input and output anyway, so I would essentially tie the negative outputs of the bridge rectifiers together and also to chassis GND while I'm at it, since it's going to have a metal case and if I remember my SMPSs, the chassis is almost always GND.
Any thoughts ? I'd love to have a high voltage regulated PSU as well (which I'm aware is not possible with the current setup), but none of the modules out there go any higher than 50v-60 MAX. Cheers.
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