MH's ideal coil and voltage question

[tinman]

You have an ideal voltage source and an ideal coil of 5 Henrys.  At time t=0 seconds the coil connects to the ideal voltage source. For three seconds the voltage is 4 volts.  Then for the next two seconds the voltage is zero volts. Then for two seconds the voltage is negative three volts, and then for the next six seconds the voltage is 0.5 volts.  Then after that the voltage is zero volts.
What happens from T=0 when the ideal voltage is connected to the ideal coil?.

After reading all of what has been posted from everyone here-->

At T=5 seconds,MHs device explodes.


Brad

[MileHigh]

If we take into account that MH thinks DC means a steady state flow of current in one direction,then we would have to use the AC model to satisfy MH

Brad

I don't really think that you want to act like a little imp with respect to me when it comes to this discussion.  I assure you that people that understand inductors knew exactly what I meant by saying "there is no voltage across an ideal inductor inductor with DC current flowing through it."  I did not have to say "constant DC."  You are the person that shockingly mixed up "constant DC" and "changing DC" and you used that ignorance in a vain attempt to "set me up" and it totally backfired on you to an extreme level.

An ideal voltage source does not "contain energy" and likewise an ideal short does not "contain energy."  You still need to work on that angle.

No "little imp" please.  Try to answer the question, that's your real goal.

MileHigh

[poynt99]

Why is that Brad?

[tinman]

I don't really think that you want to act like a little imp with respect to me when it comes to this discussion.  I assure you that people that understand inductors knew exactly what I meant by saying "there is no voltage across an ideal inductor inductor with DC current flowing through it."  I did not have to say "constant DC."  You are the person that shockingly mixed up "constant DC" and "changing DC" and you used that ignorance in a vain attempt to "set me up" and it totally backfired on you to an extreme level.



No "little imp" please.  Try to answer the question, that's your real goal.

MileHigh

An ideal voltage source does not "contain energy" and likewise an ideal short does not "contain energy."  You still need to work on that angle.

When we are talking about your circuit MH,then while your voltage value from your ideal voltage source is 0v,then yes,the ideal inductor dose contain/store energy,and that energy can be recovered when the shorted(looped) ideal inductor becomes open.

Regarding the DC current flow thing,it was you that told me to be specific when defining terms,when those terms have multiple meanings--such as a DC current dose.

Get off your ass,and stop being lazy,and be specific as you have told me to be--for those less in the know,as you described.

Brad

[tinman]

Why is that Brad?

Very simple Poynt.

As we have agreed on,while the ideal voltage source has a value of 0 volts,the current will continue to flow through this ideal inductor loop.
At T=5 seconds,the voltage source wants to instantly reverse that current flow direction.
So we have an ideal 5 Henry coil,with current flowing in say a CW direction around the loop.
At T= 5 seconds,the coil is instantly supplied negative 3 volts from an ideal voltage source.
At that instant,you have to infinite current values trying to flow in opposite directions.

Lets use MHs water flow in pipes analogy.
We have water flowing through a pipe at a set rate. We then try to change that flow of water to the opposite direction in an instant. The instantaneous pressure would be infinite if nothing gave out--but something will.

Here in this situation that is !ideal!,and no energy can be dissipated either by the ideal inductor,or the ideal voltage source,you have to wonder what will happen at the instant of the collision of the two meeting apposing current flows.

In order for the current to stop flowing,it must be dissipated into a load-one that can dissipate the energy of that current flow. Normally this can be done just through the resistance of the winding wire it self,but here we have ideal wire that cannot do this.

So at T=5 second's,something has got to give.

Brad