Joule Thief 101

[EMJunkie]

And just where and when did either TK or Tinman mention "reactance" in responding to Tinman's original question?

PW

PW - Youre being difficult delerately - Why?

You know as well as I do, Reactance is responsible for changing the Phase Angles of Current and Voltage. Three different Phase Angles have been shown by TK and Brad:  90, 91.08 and 180 Degrees

How is it possible we see any change at all of Phase Angles if what you say is true? Do the Laws of Science change ramdomly, at will, do they? That is, Electromagnetic Induction Changes depending on what Time of Day it is!!!

   Chris Sykes
       hyiq.org

[picowatt]

TK's response to Tinman's question:

Brad, your scope shot shows the expected 90 degree phase difference as predicted by Faraday's Law: The induced (negative) EMF in the second coil is proportional to the _time rate of change_ of the inducing magnetic field from the first coil.

The first coil's magnetic field follows, to first order, the current shown on the scope trace. At the peaks of this current, the time rate of change is zero (instantaneous slope is horizontal) -- and so the induced EMF as shown in the second coil's trace is zero (the induced current trace crosses the zero volt baseline at the same time the inducing current peaks.) When the inducing current (magnetic field) is changing at its maximum rate (the place where the instantaneous slope is steepest or most vertical: the zero crossing) the induced current is at its maximum (the peaks).

As you raise the frequency of your test, stray inductances (wire connections) become increasingly important and the observed phase difference on the scope will change.

EMJ's response to TK's answer above:

WRONG!!!


180 Degrees is the angle you will see!!! Faradays Law does not predict this, its actually Heinrich Lenz and Lenz's Law!!! Written as a (-) sign in the Equations of Faradays Law of Induction.

Which is Equal and Opposite.

See TK, if you had a handle on this, you could see and do so much more!!!

Chris Sykes

Clearly EMJ was wrong.  Even the references EMJ himself has posted refute his answer...

PW 
 

[EMJunkie]

TK's response to Tinman's question:
EMJ's response to TK's answer above:

Clearly EMJ was wrong.  Even the references EMJ himself has posted refute his answer...

PW 

Thats it - "Clearly EMJ was wrong" - This is your proof?

Youre saying Every Single Textbook in the world is wrong and Reactance is not responsible for the Phase Angle differences we see every day of the week, that we measure on a continual basis to correctly measure Power?

This is your proof?

PW - Shame on you!!!

Please feel Free to show us the Mathmatical Proof where the Equation (E.M.F = -N dϕ_B/dt) Predicts the Phase angle differences between Voltage and Current we have seen already!

Go ahead, please provide the proof!

   Chris Sykes
       hyiq.org

[picowatt]

Thats it - "Clearly EMJ was wrong" - This is your proof?

Youre saying Every Single Textbook in the world is wrong and Reactance is not responsible for the Phase Angle differences we see every day of the week, that we measure on a continual basis to correctly measure Power?

This is your proof?

PW - Shame on you!!!

Please feel Free to show us the Mathmatical Proof where the Equation (E.M.F = -N dϕ_B/dt) Predicts the Phase angle differences between Voltage and Current we have seen already!

Go ahead, please provide the proof!

   Chris Sykes
       hyiq.org

I present as "exhibit one" the page you copy/pasted several times such as in your post #1658 and the caption to "Figure 10.14"  therein.

Do you now claim the material contained in that copy/pasted page is also in error?

PW

[EMJunkie]

Fact: Tinman's experiment is classed as a Transformer.
Fact: Transformers can exibit many different Phase Angle differences (within the range of 0-360 Degrees) - Thus the reason we Measure it in the first place.
Fact: We have seen several different Phase Angle Differences already from te replications.
Fact: The smallest change to the Circuit can Change the Phase Angle
Fact: The smallest change to the System can Change the Phase Angle


Fact: Faradays Law of Electromagnetic Induction works and is still valid through all these changes. No matter where the Phase Angles of Voltage to Current are.


FACT: Faradays Law of Electromagnetic Induction does not Predict Phase angles between Voltage and Current. It Predicts E.M.F


   Chris Sykes
       hyiq.org