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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
 Posted - Feb 07 2007 : 09:15:07 AM
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I thought they were, although the symbols are not the standard symbols for SCRs.
Your drawing has errors, though. D4 and D5 should be connected across L1, and all the SCR cathodes should be connected together. BTW, C2 is not necessary because C3 will charge without it.
Going back to your earlier posting about discharging through 1.7ohms, that's not quite what you've got. I assume the 1.7ohms is the resistance of the SCRs in parallel. But C3 is discharging into an inductor in which you cannot get an instant pulse of current due to its inductance. As the current in L1 starts to increase, it causes a back EMF which opposes the increase. The result is the current will built up relatively slowly - not as a sharp pulse.
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Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
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cyclopsitis
Nobel Prize Winner
Canada
732 Posts |
Posted - Feb 07 2007 : 1:23:27 PM
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Binary, No problem about posting the formulas I find it frustrating trying to find formulas by Google because you never find them unless you search through to page 6069694388828289991224 then maybe you'll find what you’re looking for. You’re welcome anyway!
K
I'm just glad I didn’t make a mistake in typing it out! LOL |
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Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Feb 07 2007 : 4:13:51 PM
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You did a mistake... hehe just kiddin!
Im on the 5th read through and still a lille confused!
pebe,
I forgot to add this to the previous post, What I want is to discharge a capacitor suddenly through a coil this causing a iron projectile inside the coil to move... somehow. The 1.7ohms is the resistance if the coil.
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cyclopsitis
Nobel Prize Winner
Canada
732 Posts |
Posted - Feb 09 2007 : 11:27:33 AM
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| Most of the time I have to read things over about 3 times before I can actualy retain most of the information! HA! that is why I have not read through the inverter topic! lol |
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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
Posted - Feb 09 2007 : 11:50:08 AM
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quote:
pebe,
I forgot to add this to the previous post, What I want is to discharge a capacitor suddenly through a coil this causing a iron projectile inside the coil to move... somehow. The 1.7ohms is the resistance if the coil.
Now that's quite a different ball game to the discharge of a simple CR circuit.
If the iron slug is inside the coil it will not move. What you need is the slug outside the coil so it will be drawn in when the coil is energised. But you then need a way of powering down so that inertia will allow the slug to continue moving.
Not my speciallity, I'm afraid. |
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cyclopsitis
Nobel Prize Winner
Canada
732 Posts |
Posted - Feb 10 2007 : 09:31:53 AM
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You need to watch the voltage in that type of circuit. A cap and coil in parallel make a tank circuit that can produce over a 1000V easy.
How did we get onto this… I’ve missed a lot of this conv. LOL
K |
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Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Feb 10 2007 : 12:28:16 PM
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The capacitor in my circuit is not in parallel, so no high voltages for me.
Also woulden't a coil (inductor) in parallel with a capacitor make a LC oscillator, allthough if im wrong I still like the idea of 1000V!
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cyclopsitis
Nobel Prize Winner
Canada
732 Posts |
Posted - Feb 12 2007 : 12:28:40 PM
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Yeah exactly it’s a very basic oscillator. A tank circuit doesn’t last long at all it just does a few quick cycles then because of losses in heat and such it dies... If only there were no losses it would keep going... Stupid physics!!! I like voltages in the 000000 figure range too! LOL. Do you have any info on perpetual motion?
K |
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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
Posted - Feb 12 2007 : 2:54:59 PM
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quote:
Originally posted by cyclopsitis
.....Do you have any info on perpetual motion?
K
Ssh! you'll have the men white coats coming for you! |
Edited by - pebe on Feb 12 2007 2:55:52 PM |
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Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
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pebe
Nobel Prize Winner
United Kingdom
1078 Posts |
Posted - Feb 13 2007 : 06:07:56 AM
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The movement of anything that appears perpetual because of inertia, will invariably slow down because friction will consume energy. So it cannot have perpetual motion.
A satellite in orbit is the nearest thing to perpetual motion. Air friction is negligable, short term, but there must be *SOME* atmosphere up there. So who knows whether it will slow down and fall to earth many centuries into the future? |
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CurrentOverflow
Mad Scientist
Canada
311 Posts |
Posted - Feb 13 2007 : 07:12:57 AM
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| we should ask space bison about this....im sure one of his ideas work :) |
~Mike~
Theres 10 kinds of people, those who understand binary and those who don't |
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cyclopsitis
Nobel Prize Winner
Canada
732 Posts |
Posted - Feb 13 2007 : 8:21:20 PM
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Thanks Binary for the link :D much appreceation! Now I have some reading!
K |
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Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
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Topic |
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Physics
