How 2 build a Dynamic Load tester?

[Zero Cool]

I have been playing with audio amplifiers for some time now and i have always wanted some type of dynamic load to test various types of power supplies and regulaters with.

Anyone know of a way to build such a thing? it would need to handle up to 2000VA and +/- supplies at the same time. it would be nice if it had some sort of signal generator input so that you could test the PSU under test under dynamic conditions.

I was thinking maybe it would be possible to build something with banks of transistors sort of like a shorted power amp output stage or something.

I could just use a amplifer circuit of course but that wont work for what i am really trying to do. I have a batch of nice 2kva toriods that i want to test thermal rise at rated power and % of self regulation. therfore i need a way to "load" the regulated PSU down @ some specific current and take measurments over time.

I could just do it old school style with a mondo bank of power resistors but i am looking for something a bit more elegant and controllable.

I have seen dynamic loads on ebay but i am unfamiler with how they work.

any thoughts on this?


Zero Cool

[DigitalJunkie]

I think our friend Geek has just what you are looking for..or something very close..

http://geek.scorpiorising.ca/cgi-bin...num=1090319556

[Zero Cool]

AHHH very cool, very close to what i had in mind!

Great website also. thanks for pointing me in that direction!



Zero Cool