Electronics > Projects, Designs, and Technical Stuff

Help with diy bench psu circuit.

(1/7) > >>

gabri.peic:
So i got my hands on a pretty beafy toroidal transformer for free. Size is 11cm x 4.5cm and i think the power is around 200va since it says 200 on the sticker, it has 2 identical secondary windings and each one is 26v ac unloaded.
Anyways lets get to the point.
I want to build myself dual channel power supply with it so i can tets amplifiers and things that need two power rails.
So ideally i need something that can take around 36v dc input and provide adjustable output preferably with variable current limit.
My plan is to have two adjustable 30v outputs that i can put in series for dual rail or more voltage. Or in parallel for more current.
If anyone knows of any good way to do this pleas let me know.

Note: I know this will require huge heatsink with forced air cooling.

m3vuv:
something with 2x lm723 chips maybe,check out the datasheets!



amosborne:
This is an awesome but deceptively advanced project depending where you take it.

Is this linear or switching?
Step up or step down?
How will you load share? Passive droop or master/slave?
How tight and fast is the regulation?
Constant current mode?
User controllable OVP/OCP?
How much current are we talking?

I would probably look around at commercial supplies and find a set of specs you like. Then try and hit those specs with your design. Saying you want 36V or whatever is the tip of the iceberg.

I’m jealous of your transformer.

ledtester:
There's been a lot of interest in using transformers with the Riden RD60xx power supplies, e.g.:

https://www.eevblog.com/forum/testgear/ruideng-riden-rd6006-dc-power-supply/msg3881924/#msg3881924

Look in that thread for an alternative firmware provided by user Unisoft which adds a lot of features and enhancements, e.g.:

https://www.eevblog.com/forum/testgear/ruideng-riden-rd6006-dc-power-supply/msg3941395/#msg3941395

gabri.peic:
Basically i would like to build something based on a linear regulation with constant current/constant voltage mode, range would preferably be 0-30v and 0-4A,
I would like to have two isolated channels since  i have two secondary windings. And a switch that switches modes between independent tracking, parallel tracking or series tracking.
Independent tracking would give me two independent power supply outputs, Parallel tracking would allow me to hook them in parallel and get more current, And series tracking would be used to either get more voltage or center tapped supply.
I was planning on something based on this video:

https://youtu.be/_CFIovMkRyg

Obviously I would have to adjust it for my current and i would have to build two but would this be able to operate in series/parallel configuration.
Thanks.

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version