Inductive Kickback

[gotoluc]

I'm curious......Are you aware of a method which can be applied to electro mechanical devices which grants one the ability to produce "voltage spikes", a method which does not put the brakes on the prime mover? 

Regards

Could that be shorting at a specific time?

[citfta]

For those ignorant of what the term flyback really means I will try to educate them a little.  The term flyback originated in the early days of television when all TV's had a CRT or cathode ray tube.  After the electron beam was moved from left to right across the screen to paint a line of black and white data the horizontal output tube was switched off very quickly and the inductive spike from the horizontal output transformer was used to drive the horizontal defection coils to cause the electron beam to "flyback" to the left side of the screen.  The term originally had nothing to do with the actual discharge of an inductor.  Just like many of the terms used by hobbyist the term has taken on a different meaning.

[tinman]

Yes, you can see the "step down" that the current takes at switch off.  You notice it all makes sense because for a short time you see the voltage trace is near-vertical and negative at that time.  That corresponds to a short powerful impulse of negative torque on a flywheel so that the RPM takes a near-instant step down in speed.

MH,Verpies-anyone

When we calculate the dissipated power from the below diagram,during the 70% off time,the circuit should be split in half,and the dissipated power from each half should be equal-correct?.
So if we have say 13,68mW being dissipated across the inductor and resistor,we should also have 13.68mW being dissipated across the LED--?--see pic below.

So should it now be 13.68 + 13.68 X 70% for our power out?
Which would be 19.15mW ?

[synchro1]

When it comes to theories and why or how something work I leave that to the scientist to work out.
Using a practical effect that can improve or assist a motor or generator is all that I'm interested in and will put all my energy in that alone.

Luc

@Luc,

I suggest someone try increasing rotor magnet strength.

[synchro1]

Prototype "Flyback Motor"; Look at the size of the rotor magnet:

https://www.youtube.com/watch?v=1gWZchP8-Hk