Reviewing Pulse Motor Circuit Ideas and Theory

[earthbound0729]

Good evening all. Have been working alot this week with reading and watching hours of Youtube vids.
Also received my ARRL 2016 book and promptly removed the CD. No time to peruse it yet. Hopefully this weekend.
I also had the opportunity to test out my Tektronix 2465A oscilloscope --(more videos for that) Have a total of 3 probes 10m ohm each.
One doesn't seem to work well. Also I noticed on some of the higher frequency testing that the right edge of the screen tends to be a bit fuzzy.


I did complete building 2 of my circuits and joined them together in functionality on a bread board.
I built the 555 timer circuit and have been testing the capacitor controlling the frequency. My highest test via the oscilloscope is ~150 kHz.
I am waiting on smaller picofarad and nanofarad capacitors coming from China.

Likewise, I needed a driver for my coils and built a mosfet circuit driven by the 555 into the visual range, I have good correlation between the 2 LEDs.
See pictures below.

In the meantime, I am able to begin testing on my coils this weekend.
I also want to build a couple of Tesla type coils this week in different sizes, from very small to large, and test those also.

Questions, comments, and suggestions welcome.

earthbound

[rakarskiy]

Goodness and wisdom, for ALL!

https://www.youtube.com/watch?v=tL-nXxQM-B8&t=341s

Pulse pusher system is divided into two parts.
The first part, due to the energy in the capacitor. Which stored by the energy of self-induction, the previous pulse.
The second part of the pulse, with the classic indicators of not more than0,8 - 0,9 efficiency.

If you recall the Bedini circuit using a half-bridge.
http://ua-hho.do.am/_fr/0/8700073.jpg

What I suggest is the following.
http://ua-hho.do.am/_fr/0/2179670.jpg

Energy self-inductance, directly to the condenser. Capacitor receive voltage level is greater than the battery voltage.
When next pulse capacitor is discharged first, forming the "explosive momentum". The battery does not waste energy.
The second part of the pulse, as usual.
But kinetically, the rotor has already received its repulsive force.

[tinman]

A simple mod to the SSG,so as you can use only one battery,to both run the motor,and charge with the high voltage spikes as well.

By the installation of a third inductor(used as a current choke),we are able to use just the one battery,and where we can successfully send the inductive kickback spike back to the very same battery that is running the motor.

A great way to check if your pulse motor !is! actually OU,as the battery voltage should continue to rise over a couple of hours run time.

No cigar in my case,but as you can see,we have been successful in diverting the HV spikes back to the battery,in stead of forming a current loop through the circuit-which is the problem with the standard SSG and SG circuits.


https://www.youtube.com/watch?v=8_VCf_ZeQoc


Brad

[shylo]

Thanks Tinnman, Why is the neon always used?
Also couldn't you be collecting the spike from the trigger coil and choke as well?
Instead of feeding your supply battery the spike , feed it directly back to the drive coil via some kind of switching?
Last but not least , what are those cvr things, are just so you protect your scope?
Nice build.
artv

[tinman]

 author=shylo link=topic=16645.msg500905#msg500905 date=1488104419]

Thanks Tinnman, Why is the neon always used?

The neon is used to protect the transistor,if the return path of the inductive kickback becomes disconnected from the battery-or load it may be connected to.

Also couldn't you be collecting the spike from the trigger coil and choke as well?

You can,but there is no point,as it is simply divided between all three windings.

Instead of feeding your supply battery the spike , feed it directly back to the drive coil via some kind of switching?

You dont need switching,and feeding it back to the drive coil is the very thing we are trying to avoid,as this forms a current loop,and all that energy is simply dissipated as heat through the circuit.

Last but not least , what are those cvr things, are just so you protect your scope?
Nice build.

CVR= Current Viewing Resistor.
This is so we can calculate current by measuring the voltage drop across each CVR.
It also allows us to see what the inductive spike is doing,and which way it is going.