Hey all,
So, I have this project that involves running a fairly meaty amount of current through a very low Z coil (and array of coils sometimes).
meaty ~ 10-40 A
low Z ~ 10-40 mOhms at DC
L ~ 70uH
I was able to accomplish some great results at 60Hz with a variac and an old rackmount UPS power supply xFormer. However, I need to put higher freqs through it, 1 and 2 kHz would be nice. Sine wave.
I don't really care about THD or anything like that. And I'm definitely heating this coil up, which is actually the point.
Long post short, I was going to use an audio amp with some dummy resistors in series. But I'd like to make something more specific and basic. And I'd rather not destroy said audio amp if I can help it. maybe something like a tank circuit but for these lower f. I'm a little rusty though so I figured I'd ask.
I'm debating FETs vs. BJTs, maybe the equivalent of a common-collector arrangement....
Any thoughts?
So, I have this project that involves running a fairly meaty amount of current through a very low Z coil (and array of coils sometimes).
meaty ~ 10-40 A
low Z ~ 10-40 mOhms at DC
L ~ 70uH
I was able to accomplish some great results at 60Hz with a variac and an old rackmount UPS power supply xFormer. However, I need to put higher freqs through it, 1 and 2 kHz would be nice. Sine wave.
I don't really care about THD or anything like that. And I'm definitely heating this coil up, which is actually the point.
Long post short, I was going to use an audio amp with some dummy resistors in series. But I'd like to make something more specific and basic. And I'd rather not destroy said audio amp if I can help it. maybe something like a tank circuit but for these lower f. I'm a little rusty though so I figured I'd ask.
I'm debating FETs vs. BJTs, maybe the equivalent of a common-collector arrangement....
Any thoughts?