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MH's ideal coil and voltage question

Started by tinman, May 08, 2016, 04:42:41 AM

Previous topic - Next topic

0 Members and 5 Guests are viewing this topic.

Can a voltage exist across an ideal inductor that has a steady DC current flowing through it

yes it can
5 (25%)
no it cannot
11 (55%)
I have no idea
4 (20%)

Total Members Voted: 20

minnie




   poynt is after something.
   At time 0. VL = Vin,
   He wants to show us something, come on men, what is it?
         John.

poynt99

So what I am hearing is that the current plot for a non-ideal 5H inductor (Red is R=1) is correct, but for the ideal inductor (Green is R=1p) it is not correct. Did I get that right?

One thing; can we agree that a 5H inductor with 1p Ohm of resistance is close enough to ideal? That is the Green trace. If not, why?

Notice how the two current plots track almost perfectly for the first 0.2s? Yet some say the ideal plot is incorrect.
question everything, double check the facts, THEN decide your path...

Simple Cheap Low Power Oscillators V2.0
http://www.overunity.com/index.php?action=downloads;sa=view;down=248
Towards Realizing the TPU V1.4: http://www.overunity.com/index.php?action=downloads;sa=view;down=217
Capacitor Energy Transfer Experiments V1.0: http://www.overunity.com/index.php?action=downloads;sa=view;down=209

poynt99

Quote from: tinman on June 30, 2016, 05:32:21 AM
It starts to straighten out to a more linear incline-as far as time is concerned.

So what happens when we finally reach R=0?

Is there some paradigm shift that occurs and the world blows up, or does the trace just become perfectly straight?
question everything, double check the facts, THEN decide your path...

Simple Cheap Low Power Oscillators V2.0
http://www.overunity.com/index.php?action=downloads;sa=view;down=248
Towards Realizing the TPU V1.4: http://www.overunity.com/index.php?action=downloads;sa=view;down=217
Capacitor Energy Transfer Experiments V1.0: http://www.overunity.com/index.php?action=downloads;sa=view;down=209

poynt99

Let's look at tau once again:

For an R=1p Ohm and L=5H, tau=L/R, 5/1p = 158 thousand years.

I think in our 3 second time frame, that green current trace can be considered pretty damn straight, and thus close to ideal.
question everything, double check the facts, THEN decide your path...

Simple Cheap Low Power Oscillators V2.0
http://www.overunity.com/index.php?action=downloads;sa=view;down=248
Towards Realizing the TPU V1.4: http://www.overunity.com/index.php?action=downloads;sa=view;down=217
Capacitor Energy Transfer Experiments V1.0: http://www.overunity.com/index.php?action=downloads;sa=view;down=209

minnie




   I can't see anything wrong,it is exactly what I would expect.
   PW. seems to suggest that for an ideal inductor.
         John.