On Tue, 15 Jan 2008 23:35:16 -0800
Roy Lewallen wrote:

Roger Sparks wrote:
On Tue, 15 Jan 2008 14:18:15 -0800
Roy Lewallen wrote:

clip...........

In my view, logic demands a smooth flow of power and energy from source to load.

Your logic is flawed. A load which contains both resistance and
reactance has energy flow in one direction during half the cycle and
energy flowing the other direction during the other half. Because of the
resistance, the two aren't equal; the difference is the energy being
dissipated each cycle. If the load is an open or short circuit, no
energy flows to the load at all. If the load is purely reactive, it
stores the energy for half the cycle and returns it during the other half.

My logic is sound, but perhaps my statement was too brief to convey my meaning.

By smooth flow of power and energy from source to load, I do not mean a DC like flow. Instead, I mean that we should be able to trace the time slice that contains the peak energy level of any wave. The energy in this time slice MUST follow the rules of conservation of energy so it will not disappear. The flow of power and energy that I was speaking of is the physical movement of this slice of energy followed through time.

Your mention of energy flowing "in one direction during half the cycle and
energy flowing the other direction during the other half" would be in reference to a reflection from any source. My contention is that the reflected energy comes first from a source and is traceable to that source. In the case of lumped reactance, we can still trace the peak through time while recognizing that the physical location may not move during the time the peak is within the reactive component.

A reactive element can easily return the stored energy any time after the peak has passed, not waiting until the second half of the cycle. Therefore, your emphasis on "If the load is purely reactive, it stores the energy for half the cycle and returns it during the other half." is misleading. I think you want to more simply say something to the effect of "If the load is purely reactive, it stores the energy for some period of time before returning the energy".


We should be able to account for both energy and power for every instant of time, over every inch of distance. I thought you were doing that in TLVis1 demo 4.

I am indeed. It shows exactly that. If you'll look carefully at the
graphs, you'll see that it demonstrates what I've said above.

clip.....
73, Roger, W7WKB