[Re: thermal tips re expo converters:]

[Bissell, Harry]

Correct, no doubt. The techniques I'm suggesting serve to decouple the
external temp changes from reaching or disturbing the expo converter. If we
change ambient and the converter takes a half hour to notice, we win. With
high heat loss, or low heat loss the circuits will achieve steady state. You
could even turn the heater power down and still stabilize the loop. Which
factor is more significant, good thermal isolation, or ability to bleed off
excess heat ?  Beats me... what does anybody think ? :-)  Harry Bissell

> -----Original Message-----
> From:	Martin Czech [SMTP:martin.czech at intermetall.de]
> Sent:	Tuesday, February 09, 1999 2:21 AM
> To:	varner at k-online.com; harrybissell at netscape.net
> Cc:	synth-diy at mailhost.bpa.nl
> Subject:	Re: [Re: thermal tips re expo converters:]
> 
> I'd just like to mention that you need some thermal loss in order to
> cool the device down again. If it would be perfectly isolated, this
> would mean that heating is very fast, but cooling very very slow. The
> slightest regulation loop overshoot, or self heating of the expo pair
> would need very long to settle down.
> 
> A peak detector is an electrical analogy to this behaviour.
> Without bleeder the control loop goes nuts.
> 
> m.c.