gEDA-user: OT: Thyristor based DC-machine drives

[Peter Clifton <pcjc2@xxxxxxxxx>]

Hi...

This is rather OT, I know (ok - we used gschem to draw the panel
schematics), but does anyone here have familiarity with thyristor based
DC-machine drives?

I and a college just installed one at the lab, and whilst it works fine,
it causes the DC-machine to emit the most horrible buzzing sound (due to
the switching of the drive), even when the DC-drive is energised, but
commanded to zero speed (and thus zero armature current whilst
stationary).

Does anyone know of any tricks to reduce the acoustic noise?

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)



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