From: "Malcolm Watts"
Date: Mon, 14 Oct 2002 09:52:04 +1300
Subject: Re: [TSSP] Top Voltage
Hi Paul, all,
To address one point:
> PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
> 1 37.154 (0.01%,4Hz) 93.74 (0.99%, 0.9) 0.0dB
>
> 150 Firing volts
>
> PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
> 1 37.162 (0.01%,4Hz) 92.77 (1.17%, 1.1) 0.0dB
>
> 200 Firing Volts
>
> PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
> 1 37.160 (0.01%,4Hz) 92.13 (1.17%, 1.1) 0.0dB
>
> Notice that the Q is already falling at 150 volts, if anything
> I'd expect it to rise due to reduced primary loss factor. Does
> this indicate early breakout? Maybe not, but I'm left wondering
> why the Q is going down as the voltage is raised.
The absolute losses in the secondary ground path are increasing as
base current goes up. Too early in the morning for me to look from
the point of view of percentage losses. Does this make sense?
Regards,
malcolm
> I've a lot more work to do to refine these figures. Time domain
> calcs are still running, so more later I hope.
> --
> Paul Nicholson,
> --
>
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.