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From: "Phil Allison"
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com>
Subject: Re: Help - Power mosfets - difficult load
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Date: Thu, 24 Oct 2002 17:45:06 +1000
NNTP-Posting-Date: Thu, 24 Oct 2002 17:36:24 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Bill Allison" wrote in message
> For the benefit of new participants, I'm not that concerned about
> motor or battery efficiency as the winch, currently equipped with
> crude tension sensor driving on/off relay, has power to spare. My main
> concern is keeping within the (expensive) fets' ratings.
** And you have studiously ignored advice on exactly that point.
> I'm not using a permanent magnet motor.
** So ???
> To all - this has generated such interest and controversy that I feel
> obliged, once construction is complete and assuming (!!??) success, to
> post oscillograms somewhere (somebody suggest where?) to quantify just
> how much of a problem operating at 50Hz turned out to be. So keep an
> eye open for this thread re-awakening in a few weeks.
** Keep all the blown fets and post a picture later on will you.
.. . . . . ............... Phil
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