Joule Thief 101

[tinman]

I would be seeing what polarity emf is induced in both the secondary and primary from the magnet motion alone (you've probably already done that). I'd also be attempting to determine all the phasing and timing, as MH suggested, in order to try and piece together what is happening throughout the process.

Do you think the same effect would be present if your air transformer was just a simple 1:1 ratio? Have you tried it?

I am doing what i can,as i can.
I have the laser setup for the timing relationship test. But at a guess,i would think the timing of the magnet is 90* advanced from that of the current(magnetic field) of the primary,due to primary and secondary phase alignment with the oscillating magnet in play.

I feel that the magnet is not having a primary effect on the primary coil,but a secondary effect arising from the increase in current flow in the secondary,and where the magnets primary induction relationship is with the secondary winding.
So we have a situation where the primary coil is driving the oscillating magnet,and the oscillating magnet is the provider for the increase in the secondaries current /power output. But due to the magnetic field phase relationship between the fixed field orientation of the PM,and that of the alternating field of the primary,some how is allowing the secondaries EMF/current phase to line up with that of the primaries phase.

Anyway--a bit of guessing going on,in way of observation of scope shot's.
Will know more soon.
In the mean time,do you know of any other way that the impedance could be changed,where it would not work against current understandings.?.


Brad

[poynt99]

In the mean time,do you know of any other way that the impedance could be changed,where it would not work against current understandings.?.


Brad

I don't, no.

How about my 1:1 transformer question?

[tinman]

I don't, no.

How about my 1:1 transformer question?

Oh yea--sorry.
I will wind a coil tomorrow with the 1:1 turn ratio,and will give it a go.

I have just shortened the oscillator stem,and managed to increase the resonant frequency to-close to 40Hz. This small increase has made a big difference in the secondaries output,as well as lowering the primaries P/in even further. After some experimenting with the frequency,by adjusting the frequency .01Hz at a time either side of the absolute resonant frequency,i can actually get the secondaries current to lead that of the primaries current,or if i adjust the frequency the other way,i can get the secondaries current to lag the primaries current.

Have you ever seen a transformer where the secondaries current leads that of the primaries?.

Preliminary power measurements.

Without oscillator setup.
P/in 173mW
P/out--5 ohm resistor across secondary= 320 uW-.32mW

With oscillator in play
P/in 147mW
P/out--5ohm resistor across secondary= 7.372mW

That is a 15% decrease in P/in,and a 2300%+ rise in electrical output,as i will be leaving dissipated energy by way of vibrations out of the mix--to hard to measure.


Brad

[MileHigh]

Well, going from 0.18% efficiency to 5.01% efficiency is progress no doubt.  Doctor Strangelove would be impressed.

[tinman]

Well, going from 0.18% efficiency to 5.01% efficiency is progress no doubt.  Doctor Strangelove would be impressed.

Another idiotic comment from the peanut gallery.
No idea at all as to how the transformer is wound,what the turn ratio's are--and so on and so on.
Also pays no attention to details regarding rasing the inductance value far beyond that of what the PM could.
How are those answers coming along MH-- Wouldnt want you in the same boat as EMJ--now would we.


3rd  time asking MH 5 questions about transformer impedance.
Oh,and here is a new one MH.
Question 6--provide a link or information on a transformer where the secondaries current leads that of the primaries current.
I will add that one to the list MH.

1-The drop in current flow through the primary coil(the drop in P/in),means the impedance value of the primary coil went up or down?
2-The increase in current flow through the secondary coil,resulting in a higher power value dissipated across the 5 ohm resistor, means the impedance in the secondary coil went up or down?
3- The combined results of the transformer as a whole,means the impedance went up or down?.
4-The phase relationship between the primary and secondary coils current is bought into phase with each other how?
5-Show another transformer test carried out that shows the EMF and current phase relationship between the primary and secondary coil of a transformer to be in phase.
6--provide a link or information on a transformer where the secondaries current leads that of the primaries current.

Lets hope you dont fail like minnie did ,with what you deem !simple questions!


Brad