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From: Tony Williams
Subject: Re: Strange behaviour - core saturation puzzle
Date: Fri, 17 Jan 2003 00:23:38 +0000 (GMT)
NNTP-Posting-Date: Fri, 17 Jan 2003 00:27:45 +0000 (UTC)
User-Agent: Pluto/1.14i (RISC-OS/3.60)
In article <firstname.lastname@example.org>,
Klaus Kragelund wrote:
> My problem is that the test is done perhaps once a second and the
> saturation current reaches some level - lets say 10amps. But if I
> increase the frequency of the test - the saturation level moves down
> to perhaps 8 amps. Does anyone have an explanation for this?
It sounds like you need to do a better resetting
of the core between pulses. Let it have a flyback
voltage that is larger than just one diode drop.
As an experiment try about 6 diodes in series, see
if that changes the apparent ampere-turns at which
the current curls upwards.
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