Help understandin Self's V-I limiting

sam9 · 2nd October 2003, 05:37 AM

If anyone is familiar with the section in D. Self's book on single V-I limiting I would like to pose a question. First I can follow the discussion up through the construction of the 4-ohm reactive line. Also I have run a simulation that convinces me that the single slope protection circuit functions as claimed.

Now here is where I get stumped: In reference to Figures 13.4 and 13.5 he writes that R3=15k determines the slope of protection Locus 1 (and R3=10k determines Locus 2). What I don't see is how these two loci are derived from the information presented. It seems like it should be simple as you only need two data (slope + an intercept or two intercepts).

Can anyone explain how this is done such that I could reproduce the figure as shown?

Alternatively if it derived by running a simulation, ehat is the simulation set up? Not the schematic, but what component values are varied and what is the result variable that is sought?

This will probably be very simple, but I the moment I don't see it.

mrfeedback · 2nd October 2003, 05:40 AM

What, Mikek hasn't replied yet ?.

Eric.

jam · 2nd October 2003, 07:10 AM

Eric,

I think he left the forum.

Regards,
Jam

peranders · 2nd October 2003, 12:45 PM

Just check if he has been online lately, which he has....

2nd October 2003, 05:37 AM	#1
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	Help understandin Self's V-I limiting If anyone is familiar with the section in D. Self's book on single V-I limiting I would like to pose a question. First I can follow the discussion up through the construction of the 4-ohm reactive line. Also I have run a simulation that convinces me that the single slope protection circuit functions as claimed. Now here is where I get stumped: In reference to Figures 13.4 and 13.5 he writes that R3=15k determines the slope of protection Locus 1 (and R3=10k determines Locus 2). What I don't see is how these two loci are derived from the information presented. It seems like it should be simple as you only need two data (slope + an intercept or two intercepts). Can anyone explain how this is done such that I could reproduce the figure as shown? Alternatively if it derived by running a simulation, ehat is the simulation set up? Not the schematic, but what component values are varied and what is the result variable that is sought? This will probably be very simple, but I the moment I don't see it.

2nd October 2003, 05:40 AM	#2
mrfeedback diyAudio Member Join Date: Feb 2002 Location: Perth, Australia.	What, Mikek hasn't replied yet ?. Eric. __________________ I believe not to believe in any fixed belief system.

2nd October 2003, 12:45 PM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Just check if he has been online lately, which he has.... __________________ /Per-Anders (my first name) or P-A as my friends call me

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2nd October 2003, 07:10 AM	#3
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Eric, I think he left the forum. Regards, Jam

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