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Since87 · 05-16-2003, 01:29 AM

I've been beating my head against this current measurement problem all night.

I was actually hoping the THG tester had found a clamp-on that might be able to do the job accurately, but considering that clamp on is a hungarian made device with a maximum frequency spec of 1kHz, I doubt that's the case. You need something with reasonable accuracy up to about 2 MHz to have any confidence of accurate results.

It's looking to me, like the most practical means of getting reasonably accurate results, is a modified version of my second idea. (Shunts in series with the switching inductors.) I can design a little circuit that will put out a DC voltage proportional to the current draw. Let me think about how to do this...

05-16-2003, 01:29 AM	#63
Since87 Pro/Guru - Uber Mod Join Date: Sep 2002 Location: Indiana Posts: 834	I've been beating my head against this current measurement problem all night. I was actually hoping the THG tester had found a clamp-on that might be able to do the job accurately, but considering that clamp on is a hungarian made device with a maximum frequency spec of 1kHz, I doubt that's the case. You need something with reasonable accuracy up to about 2 MHz to have any confidence of accurate results. It's looking to me, like the most practical means of getting reasonably accurate results, is a modified version of my second idea. (Shunts in series with the switching inductors.) I can design a little circuit that will put out a DC voltage proportional to the current draw. Let me think about how to do this...