Making a nearly 2kW power supply

[ahmelsayed]

Hello, Everyone

I'm trying to build a power supply that is nearly 2kW which supplies 48 Vdc and 40A. - I know it is high power but i want to build it at home -
so please, is there any suggestions ??

Thanks in advance

[DF96]

Don't wear anything metal while testing it.

[harryz33]

If you get an old microwave, get the transformer out of it, cut off the secondary, wind a new one (will need around 50 - 60 turns) you will get around 1.5 kW - 2.3 kW if you take the ballasts out.

[jeronimo2003]

Use a safety goggle when you switch it on for the first time.
Is it a SMPS or lineair? And is there any way that you can test it for functionality with reduced power.

[ahmelsayed]

it is linear PS , I will use it as a supply for an inverter.

[ahmelsayed]

yes it is a Linear PS.

[sbrads]

Input series resistors are your friends during initial low load power up.

[ahmelsayed]

OK. is there any way to regulate the output of a rectifier bridge ?

[johansen]

have you built linear power supplies before?

[kevinkr]

Originally Posted by harryz33

If you get an old microwave, get the transformer out of it, cut off the secondary, wind a new one (will need around 50 - 60 turns) you will get around 1.5 kW - 2.3 kW if you take the ballasts out.

I doubt the primary in a microwave transformer is wound for continuous high power operation.. I'm not in general a fan of newbies recycling potentially dangerous parts into a project.