Negative Inductance and measure of Magnetic force.

[synchro1]

Here's a simple attraction oscillator with the washtub stator and an SPDT spring pressure switch wired in series to the power through the inside electrodes of the switch: The outer SPDT switch electrodes will output a very powerful backspike. The flipper is unfastened at the back and vibrates out of position.

https://youtu.be/KzsBT8ZVeHQ


Here's an easier one that's chattering faster:


https://www.youtube.com/watch?v=Z5pib8eVGJw

[synchro1]

I'm blinking a reverse biased 12 volt LED off inductive kickback with a synchronous motor stator oscillator. This stator coil measures over 1/2 a Henry in inductance. The input is only 9 volts. I'm taking the kickback directly off the coil electrodes. I'm setting up to take it off the SPDT switch:

https://www.youtube.com/watch?v=SWPJFRlajlk

[synchro1]

Here's a picture of the oscillator with all four SPDT wires attached to the switch, a duct tape hinge on the end of the ferrite flipper, and the kickback transformer:

[synchro1]

"A steady state direct current of 4 ampere passes through a solenoid coil of 0.5H. What would be the back emf voltage induced in the coil if the switch in the above circuit was opened for 10mS and the current flowing through the coil dropped to zero ampere".

We can see that the voltage of the inductive kickback is the inductance in Henrys times the current in amperage over the frequency of the current interruption in seconds:

This is where increasing core inductance pays it's rent in higher output.

What I discovered during the course of this thread is that core inductance functions as turns of copper in a transformer wrap. The ratio of core inductance to high voltage transformation was cited above in my MEG comment.

[synchro1]

I measured the flyback voltage off a 2 Henry laminated silicon steel "E" core attraction oscillator; Here's the video: Following our formula above for inductive kickback voltage, to solve for frequency: 25 volts of inductive kickback, at 1 amp, times 2 Henries of inductance factors out to a divisor of .5 seconds or 2 Hertz. That's 120 oscillations per minute.

https://youtu.be/vKc0TI76T5c