[time-nuts] Parallel voltage regulators
donmer at woosh.co.nz
Fri Oct 26 19:39:51 EDT 2007
Great idea!!,....................................Don C.
----- Original Message -----
From: "Max Robinson" <max at maxsmusicplace.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Saturday, October 27, 2007 10:07 AM
Subject: Re: [time-nuts] Parallel voltage regulators
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+donmer=woosh.co.nz at febo.com RETRY
> I do have some experience with temperature controlled ovens. I found that
> long term plot of the temperature while using an unregulated supply on the
> oven heater showed small random variations due to voltage variations.
> the oven heater was put on a regulated supply the line became flat. The
> problem here seems to be during the heat up cycle. The voltage doesn't
> to be regulated during that time. You might try sensing the error signal
> and when it is outside of the linear control range you could switch in a
> parallel transistor and resistor to handle the warm-up current and it
> switch out when the oven has stabilized at the lower current.
> Max. K 4 O D S.
> Email: max at maxsmusicplace.com
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> ----- Original Message -----
> From: "Bill Hawkins" <bill at iaxs.net>
> To: "'Discussion of precise time and frequency measurement'"
> <time-nuts at febo.com>
> Sent: Friday, October 26, 2007 1:21 AM
> Subject: Re: [time-nuts] Parallel voltage regulators
>> There is a concept in temperature control called feed-forward.
>> In this case you would sample the supply line with an inverting
>> amplifier and use it to increase the oven drive signal as the
>> line voltage decreases. The goal is to keep the integral term
>> from changing as the line voltage changes. It is not as easy
>> as it sounds.
>> Bill Hawkins
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