The new generator no effect counter B. EMF part 2 ( Selfrunning )

[tinman]

What are you relying on to limit the current to 250mA?  If it is the winding and you would not saturate any magnetics at 250mA times the number of turns, then you would design your winding for 12V/250mA = 48 Ohms.

You know what-forget it Mark.
Contrary to belief,rocket science is really quite simple.

[tinman]

Btw,Lenz effect can be delayed or slowed down... ...yep, i know already...it's not true...lol
Cheers

Indeed TJ,but there are many here that will disagree. The fact is that not only can it be delayed,it can be completely reversed so as to add torque to the prime mover. The proof is in the fact that an electromagnetic field dose have a speed limit--it dose take some time to develope,as the speed is not infinite. Man has done many test to confirm the speed of light,but what about the speed of a magnetic field?-is it faster than the speed of light,or slower . One little hint is that if we apply a heavy load(low resistance) to the inductive kickback of an inductor when it becomes open circuit,the magnetic field around that inductor will collap's slower than if we applied a lite high resistive load to the inductive kickback.

Now-here is a question.
Dose the magnetic field invert when the inductor becomes open,and a load is applied to the inductive kickback,or dose it remain the same field orientation. Is it the voltage polarity of that inductor that determonds the magnetic field orientation,or the direction of current flow through that inductor?.

[lumen]

I'm saying magnetic loops.
Everything is a magnetic loop.

[MileHigh]

What is your take in regards to coil resistance MH. Is it better to have a coil of high resistance(many turns of small wire),or a coil with low resistance(few turns with a larger gauge wire)?. We will say our pulse motor will be useing a 12 volt power supply for the P/in.Our coils will be of the air core type. What coil would produce more losses in an identical setup?.

Resistance is the enemy for a pulse motor drive coil because it represents lost energy as waste heat.  So low resistance is preferable.  If you have few turns with larger gauge wire you have less resistance but a weaker magnetic field compared to more turns for the same current.  It's all a trade off between resistance, the strength of the magnetic field, and the rise time for the current to really start flowing, and nature of the rotor and magnet configuration, etc.  So there is no simple and easy answer.  I can't tell you precisely what will give you more losses in an identical setup.

However, nothing is stopping an experimenter from doing some tests if they want.  You could make some kind of multi-tap coil and try making measurements at different tap settings, etc.

My gut feel is telling me that a lower-resistance lower-turn coil would be better overall.  However, like Mark has mentioned already, with a lower-resistance lower-inductance coil, you would probably have to chop the main drive pulse into a series of shorter pulses to get good push on the rotor with minimum resistive losses.  The shorter pulses are needed to make sure that the current does not get too high.

MileHigh

[georgio78]

GUYS WHY HAS THIS THREAD BEEN TAKEN OVER BY PULSE MOTOR CRAP!
THERE IS ANOTHER ONE OR TWO THREADS ALREADY OPEN FOR THAT TOPIC PLEASE DON'T FLOOD THIS TOPIC UNLESS IT HAS SOMETHING CLOSE TO WHAT SYAIR ORIGINALLY POSTED FOR CRYING OUT LOUD!!!!!