Variable Speed AC Drive

To: tesla-at-grendel.objinc-dot-com
Subject: Variable Speed AC Drive
From: richard.quick-at-slug-dot-org (Richard Quick)
Date: Fri, 10 Nov 1995 02:31:00 GMT
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Quoting Scott Myers <102505.61-at-COMPUSERVE.COM>:

> I have been quoted a variable speed AC drive to use in a rotory
> spark gap.  This is a Baldor industrial microprocessor control
> for use with a 3 Phase motor to control motor speed....

> Programming/Control is acheived via a keypad.  Control
> connections include potentiometer control, 1 analog input, 2
> programmable analog outputs, forward and reverse run, jog, 
> E-stop, acceleration select, etc., etc.  It is capable of 
> controlled acceleration.  I have also been told by the factory
> it will not be harmed by RF.  It is highly programmable.  

> Price with motor, $450. 

Scott, it sounds like a nice piece of equipment, but it is
doubtful it will hold up long around a coil of the type you are
envisioning. Solid state controls/monitors and spark excited tank
circuits don't mix real well. I have lost lots of stuff; hand
held calculators, digital watches, and digital meters. I have
tried to keep the digital stuff near the coil cheap, and anything
expensive I unplug and/or remove to the next room when firing
high power Tesla coils.

Richard Quick

... If all else fails... Throw another megavolt across it!
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