How to put oscilator in 50V 500A circuit ?

[rkahler]

You can try to use an CM600HA-5F IGBT  http://www.pwrx.com/pwrx/docs/cm600ha5f.pdf.

I have to see how it works, thanks for advice.

[TinselKoala]

At those low frequencies you could simply parallel some power MOSFETs or Darlingtons, and drive them with Groundloop and Gotoluc's H-Bridge circuit, for fairly low cost.
The IGBT would be the "professional" way to do it, with the correct driver circuit, but at higher cost.

But we are talking serious power here, and your comment about opto-isolators (which are something completely different) makes me wonder...are you confident in your ability to build and handle circuits of that high-power level, safely?

[rkahler]

I am.
At this point i'm only getting infoes.
When I check every solution, then I'll decide what to do.
I'm only open minded, who knows what can show up.

[the_big_m_in_ok]

rkahler said:

I have some ideas with car bateries, but I need to put oscilator ( 600-700 Hz ) to work with them.
Any sugestions ?

>>Suppose you use relays with heavy contacts to handle the power?  You will get lots of harmonics, however.  They can be filter with back-pass and band-reject networks, as needed.

Some of the power supply voltage can be wired through a coil and when it's energized, the coil opens the contacts to break the connection and close the contacts again.  Simple.  The relay(s) "chatter", but is the easiest thing I can think of.

You can control the rate of coil frequency be varying the voltage with a rheostat.

--Lee
the_big_m_in_ok

[rkahler]

Thanks, but my info is that relays can't switch that fast.