Joule Thief 101

[EMJunkie]

For others, reading properly...

If one were to rearrange the Equation for Faradays Law of Electromagnetic Induction, no matter how it was rearranged, there is no way of knowing or Predicting the values for θ and ϕ - Substitute Values could be derrived, but certianly these would only ever be assumptions. Hey PW, again... Thats it, sound it out...Ass...Ump

in this Equation: ϕ = BA COS(θ)

It can not be accurately predicted!

This fact alone proves PW is Wrong!!!

   Chris Sykes
       hyiq.org

[tinman]

As I posted earlier on:


and I quote again directly from this document:



Transformers, as is stated in the document I provided, do have phase relationships. Most all of these relationships are governed by Reactance of the Circuit, thus the reason we have seen phase angles that have been shown.

Ref:Transformer Phasor Diagrams come in several varietys, I have listed them below:

   Chris Sykes
       hyiq.org

Faradays law states--Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction.

Faraday's Law. Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil

Electromagnetic induction is the production of an electromotive force across a conductor when it is exposed to a time varying magnetic field.

Faradays law predicts that a magnetic field changing in time induces an EMF in a coil of wire.


Faraday's Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor.

I have clearly said on many ocasions, E.M.F is not Current, and it is not Magnetic Flux!

That is correct.

Faradays Law of Electromagnetic Induction Predicts E.M.F, Not Magnetic Flux and Not Current!

That is incorrect Chris.
The very definition of Faradays law states that a magnetic field that changes in time will produce an EMF across a conductor/coil..
When you pass a permanent magnet across a coil of wire(meaning the magnetic field is changing in regards to that coil of wire),and EMF will be generated across that coil of wire.
The very heart of Faradays law of induction predicts this to happen.

In my schematic(posted once again below),you need to see the primary coil as that passing permanent magnet,and the secondary coil as the coil of wire the PM is going to pass.
As we approach the coil of wire with the PM(PM field rising in the coil of wire),the EMF across that coil will increase in one polarity. As the PM reaches the middle of the coil,there is no longer an increase in magnetic field strength(magnetic field no longer changing in time),and at this point,the EMF across the coil will be 0volts. As the PM leaves that coil,an EMF of the opposite polarity will form across that coil,as the magnetic field is once again changing in time.--->This is faradays law of induction-a magnetic field that changes in time in relation to a conductor, will produce an EMF across a conductor.
Your primaries EMF maybe 180* out of phase with the secondaries EMF,but that has nothing to do with the question i asked in regards to the schematic below,and associated scope shot.
'
TKs answer in regards to my specific question is absolutely correct,and is the very heart of Faradays law of induction.

Brad

[tinman]

  My ducks dive in their pond and emerge without a spot of water on them.
  How do they do it?
                     John.

The pond was empty.

[EMJunkie]

Faradays law states--Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction.

Faraday's Law. Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil

Electromagnetic induction is the production of an electromotive force across a conductor when it is exposed to a time varying magnetic field.

Faradays law predicts that a magnetic field changing in time induces an EMF in a coil of wire.


Faraday's Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor.


That is correct.

That is incorrect Chris.
The very definition of Faradays law states that a magnetic field that changes in time will produce an EMF across a conductor/coil..
When you pass a permanent magnet across a coil of wire(meaning the magnetic field is changing in regards to that coil of wire),and EMF will be generated across that coil of wire.
The very heart of Faradays law of induction predicts this to happen.

In my schematic(posted once again below),you need to see the primary coil as that passing permanent magnet,and the secondary coil as the coil of wire the PM is going to pass.
As we approach the coil of wire with the PM(PM field rising in the coil of wire),the EMF across that coil will increase in one polarity. As the PM reaches the middle of the coil,there is no longer an increase in magnetic field strength(magnetic field no longer changing in time),and at this point,the EMF across the coil will be 0volts. As the PM leaves that coil,an EMF of the opposite polarity will form across that coil,as the magnetic field is once again changing in time.--->This is faradays law of induction-a magnetic field that changes in time in relation to a conductor, will produce an EMF across a conductor.
Your primaries EMF maybe 180* out of phase with the secondaries EMF,but that has nothing to do with the question i asked in regards to the schematic below,and associated scope shot.
'

Brad, I have quoted more than enough references.

If I wanted to fill the bucket with water, what would i have to know prior to filling the bucket with water?

That I need Water and a Bucket.

I would need suficent water, to fill the bucket.

Required Materials and Quantitys to complete a task. Certain relationships are also needed, all items are necessary to be in proximity to each other before completing the task.

It is the Change in Flux (ϕ) that Induces and EMF, but with any Change in Flux (ϕ) an associated EMF is also Present. EG: A moving Magnetic Constitutes an Electric Field...

Each EMF is 180 out of phase. Lenz's Law.

And, as I have also very clearly shown, the Phase relationships are very much dependant on Complex Impedances. Although E₂ will be 90 Degrees to the Flux (ϕ), I₁ might be 120 Degrees.

TKs answer in regards to my specific question is absolutely correct,and is the very heart of Faradays law of induction.

Brad

I disagree, 90 Degrees is what your Circuit was showing. Its not Predicted. Again, its a Phase relationship, thats necessary, necessary to know, measure in some cases.

This phase relationship can be changed! It can change the system!

This is not a "Predicted" quantity. Its a Required aspect!


   Chris Sykes
       hyiq.org

[tinman]

Brad:

Read what I said again:  In your diagram the output waveform shown does not match the physical setup shown.

You are not going to invent your own reality here.  You made a mistake so suck it up like a man.

MileHigh

@ all.
I have modified the below diagram to satisfy bub bub.

Brad