View this page "AMCC-320 coupling"
MeggerMan
Click on http://groups.google.co.uk/group/energymover/web/amcc-320-coupling?hl=en
- or copy & paste it into your browser's address bar if that doesn't
work.
Paul Lowrance
Nice job! Here's the non-UK-Google:
http://groups.google.com/group/energymover/web/amcc-320-coupling?hl=en
It looks like your core is nicely coupled and could be a "no-field" annealed
core. Here's a few questions -->
* Are there four separate windings on the core?
* The yellow trace is voltage, but is it loaded with a resistor? It appears the
current and voltage are not 90 out of phase, which could happen if the core is
loaded. If so then perhaps you could disconnected the load and just measure the
cores induced voltage.
Thanks,
Paul Lowrance
MeggerMan
Yes, there are 4 separate windings on the core.
I will need to re-run the tests to confirm the channel connections and
which is inverted.
Paul Lowrance
Rob, when you re-run the tests could remove the load from all the windings? That
would make the induced voltage scope reading useful.
Regards,
Paul Lowrance
MeggerMan
> would make the induced voltage scope reading useful.
Odd thing is that the current up from 0.7A to 0.9A when I removed the
light bulb load.
The other two windings were un-connected.
Good news is that I have a 20MHz DDS based pulse board now (testing
this over the past couple of days).
http://shop.elv.de/output/controller.aspx?cid=74&detail=10&detail2=6325
It works well, has a sweep function (10 Seconds to 0.05 Seconds /
sweep) , sine wave + square wave output and I have an idea:
Feed the rectified sine output into two op-amps, use the sine wave
amplitude control to set the analogue output level and hence pulse
width. Then drive the two outputs into a dual input mosfet driver IC
and what you have is very versatile MEG pulse device.
It has a 0.1Hz resolution, so far better than any pulse circuit I
could build using a TL494.
So testing is a lot closer now thanks to this board.
Regards
Rob