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Home > Archive > Electrical Engineering > March 2008 > Re: Thyristor ON !?!
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Re: Thyristor ON !?!
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| Aditya 2008-03-31, 1:25 pm |
| On Mar 30, 2:27 pm, Palindrome <m...@privacy.net> wrote:
> Aditya wrote:
>
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>
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> What it *is* is a stupid question, with an almost unlimited number of
> potential ( ;) answers.
>
> What's the frequency of the second voltage source? Is it superimposed on
> another voltage? Is the circuit next to a radar dish and the transmitter
> has started up? etc, etc, etc.
>
> Engineers use the application(s) and environment(s) to construct
> paradigms by which to produce solutions to problems. Give them an
> infinite number of both and they will come up with an infinite number of
> solutions. Was the teacher ex-army?
>
> --
> Sue
0. The frequency part is a likely answer as freq. of none of the
sources is mentioned...
1. Filter all the "unlimited answers" via a practical mindset in a
normal laboratory without any radar dish etc. things ( although a nice
piece to think on. )
2. Will be very much thankful to you if you can detail your answer
instead of the myriad possibilities.
3. Nope, the teacher wasnt any ex-army guy.
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| Palindrome 2008-03-31, 1:25 pm |
| Aditya wrote:
> On Mar 30, 2:27 pm, Palindrome <m...@privacy.net> wrote:
> 0. The frequency part is a likely answer as freq. of none of the
> sources is mentioned...
> 1. Filter all the "unlimited answers" via a practical mindset in a
> normal laboratory without any radar dish etc. things ( although a nice
> piece to think on. )
> 2. Will be very much thankful to you if you can detail your answer
> instead of the myriad possibilities.
> 3. Nope, the teacher wasnt any ex-army guy.
You have now (partially) defined the environment. Which you hadn't done
in the original question. Now define the application. There are still a
myriad of possible answers.
Including the obvious one that should always be considered first in any
experiment. Instrumentation error.
The next obvious is that the new source has frequency components such as
to excede the dv/dt rating of the thyristor. This may be because the
fundamental frequency has changed, or because it is no longer a simple
sinusoid (eg has harmonics..square wave, perhaps?), or because it has
superimposed noise, etc.
The next obvious is that energy is being injected into the junctions by
another route. eg the thyristor has a transparent case and a high level
of incident radiation (visible or invisible) is being directed on it.
The next obvious..
Sorry, the list goes on and on and on. I repeat, it was a stupid
question to ask of intelligent students who understand the underlying
principles of electronic devices.
--
Sue
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