Circuit setups for pulse motors

[tropes]

Just wanted to post a note for Tropes, if he still visits here. I found an interesting link on another forum I frequent and it made me think of his piston driven device. Heres a quote with a link.

"I recently came across a web page on Naudin's website (http://jnaudin.free.fr/html/2magpup.htm) which demonstrates the fact that the push pull force of a magnet is about 200% greater than the force exerted by it when sliding them over each other and proposes a method for building a self running magnet motor.

So this fact can also be used in electric motor design, because an electromagnet behaves so much like a normal magnet when current passes through it. To maximize torque we must use the most of the forces that the stator electromagnet on the rotor (attraction or repulsion makes no difference).

The main trick is to use the most out of the magnetic field produced to maximize the mechanical output. Bob Teal's magnetic attraction motor was piston operated thus it was able to use all of the pull force of the electromagnet, which is more more than double the sliding force of it (according the Naudin's experiments), but rotary motors can utilize both the pulling force and the sliding force of it but both of them partially. That means it utilizes the both forces of the electromagnet but not all of the both forces some of the forces are wasted while exerting force on the crank shaft, I was wondering:
1- Does the torque produced in piston operated engines outweigh rotary motors?
2- How to increase the utilization of most of both magnetic forces to produce even more torque?"

Thanks Ren
I did find the material interesting. Regarding Bob Teal, his use of solenoid pistons does not utilize the attraction force of magnet facing magnet. His knowledge of the internal combustion engine is evident but leads to further inefficiency (solid cylinders). Unfortunately,the use of magnetic attraction in electric motors is not common so little data exists.
Tropes

[sanmankl]

Hi Toadhop.

You have certainly revive my interest in Adams motor. I'd given up pursuing it a couple of months ago (expectations were different then). Your website explains it all. Great work! and big thanks.

BTW, what software do you use to draw up the drawings? I'm looking for something better tha ms-paint!

Again, thanks. sanmankl

That's HopToad BTW    LOL!
The drawings were done in Flash 5.0
They are actually swf files on my website, but the images can also be rendered as jpg, bitmap, etc.

A lot of programmers don't like Flash, but as a drawing program, I really like it. Its very flexible and easy to use for simple drawing tasks.
It's actually a fully fledged compiler in a creative interactive animation context, but it's oh so many more things than that!

Flash is now up to Version 9 and is very expensive! If you want a really good grade Drawing/Photo imaging program then download the GIMP
Its free, powerful, and flexible. Just type GIMP in your favourite search engine and you'll find it. Theres also a free student version of CIRCUITMAKER available on the net. It's very useful for electronic layouts.

I'm glad you find my pages interesting. At some stage in a few months or so, work and time permitting, I will tidy up some of the explanations, and then add some more pages which will bring together all the little observations regarding "An Anomoly with Lenz's Law in an Open Magnetic System". When I do, I will give my "opinion" on how I think this anomoly actually occurs. At the moment, I'm very busy.

Cheers all from the Toad who Hops

@HopToad
My apologies about the change of name. 

I've dug up a SVG program called "EVE". I have it in my laptop for ages but never used it until now. It's claimed to be the world's smallest vector drawing program. Downloadable at www.goosee.com.  It's a single executable. Does what I want, essentially so I'm ok for now. Thanks for the recommendation but I can't afford Flash....$$$ and the time to learn it.

Anyway, back to serious stuff. I've been doing some adam motor setups previously and today, after winding a new coil onto an anchor boot sleeve (1 layer of #23 wire to a 3/8" sleeve), the current draw to start up was high and it remains high. Killed my TIP122 in the process. Everything is running hot! Too high current draw.

So, my question is what's the windings for your coil? I'd tried 4 layer and it's still high.  My guess is multi-layer windings to at least 5 ohms?

You have my admiration for a well-thought out, well written site on this adam motor. Well done.

Cheers, cp

[Ren]

heres some more pics guys! Enjoy. Bedini ssg awaiting circuitry and window motor (cranks!) on ssg circuit, perhaps a conversion to Bedini/cole circuit in the near future.

[hoptoad]

@HopToad
..............
I've been doing some adam motor setups previously and today, after winding a new coil onto an anchor boot sleeve (1 layer of #23 wire to a 3/8" sleeve), the current draw to start up was high and it remains high. Killed my TIP122 in the process. Everything is running hot! Too high current draw.
So, my question is what's the windings for your coil? I'd tried 4 layer and it's still high.  My guess is multi-layer windings to at least 5 ohms?

@sanmankl

Sorry to hear to you're having the dreaded burn-out problems! 

You've actually highlighted the need for me to expand on the information regarding this sort of core. After all, I gave plenty of good reasons why I liked and used it, but like all other core types, it has its limitations which must be taken into account and a downside when limitations are exceeded!

Firstly the 3/8 " diameter hollow core (you didn't specify length, but no matter), will be a very low impedance core which will saturate very quickly. That in itself is not really an issue, but if you are using the cores for drive coils, the characteristics for the drive coil will be closer to an air core, than a solid core in terms of impedance. This will mean using lighter gauge wire and more windings to achieve a higher resistance/impedance if you don't want to suffer more burn-outs. Also you could go to a slightly higher diameter sleeve as well, e.g, 1/2 inch (10mm ID, 12 MM OD), and it will help to increase impedance.

If you are only using one coil, then indeed you will need to wind many more turns of the same gauge, but it will probably be more practical to wind more turns with a lighter gauge. BTW I've never bought wire on the basis of gauge, because imperial and metric gauges are different and I can never remember either of them. DOH!  So I always look for and refer to the wire diameter. e.g:   .63mm   .4mm   .32mm etc.

The more coils that you use in series, as drivers, the higher the total inductive reactance will be. In my experiments with these particular cores, I used no less than 2 coils in series, and up to 8 coils in some setups, because they are very low impedence cores. But not as low as air cores, and therefore not requiring anywhere near the number of turns as an air core. In other words, they are a good compromise between air cores and solid or laminated cores, in terms of the number of coil winds required to achieve a given inductance and hence inductive reactance.

Your problems with using this core type may partly lie in the diameter and mass of your rotor. (I don't know anything about your rotor). The smaller the diameter, the higher the speed and the larger the diameter the lower the speed, generally speaking of course! High speed means high frequency, which means higher inductive reactance, which means less current.

My Rotor consisted of  eight x (10mm x 6 mm) Neo Magnets arranged in North South Configuration in very tight proximity to each other. I used the Dual Pole not the Mono Pole arrangement, to allow for more experiment parameters. Its Diameter is 65 mm, its made from high temperature resistant epoxy resin and fine lathed to the thickness of the rotor magnets. I used a planar rotor assembly with a precison Hard Drive bearing and brass rotor axle.

My drive cores were (8mm ID, 10mm OD) x 45 mm Length). The coils consisted of .3mm transformer wire x 250 turns.
The length of coil turning on core was 15 mm. Coils wound in heel end style. Approx diameter of coils (on core) 20 mm. DC Resistance less than 1 ohm.

Drive circuit consisted of Flip Flop MOSFET circuit based on page 3, figs 7+ 8 combined with precision optical switching as shown in fig 28 on page 9. Optimum duty cycle 20%.

At 12.6V rotor speed approximated 8,000 RPM with 2 coils at 400ma; 6000 RPM with 4 Coils at 120 ma; and 4500 RPM with 8 coils at 30ma. (BTW all the above numbers are from memory - it's nearly 6 years ago now since I played with these motors!)

If your rotor is a larger diameter, these sorts of speeds will not be reached, and therefore frequency will be lower and impedance will be lower, and current will be greater.

@sanmankl
The real benefit with these cores lies in their use as pick-up coils rather than as drivers, but they will still be suitable as drivers if you bear in mind that they are inherently low impedence, and you may need to compensate by increasing total coil impedance by methods just discussed.....

I hope this info helps you.
Cheers from the Toad who Hops 

[hoptoad]

heres some more pics guys! Enjoy. Bedini ssg awaiting circuitry and window motor (cranks!) on ssg circuit, perhaps a conversion to Bedini/cole circuit in the near future.

@Ren
Someone's been very busy!!!  Cheers mate, s'lookin good!  ........KneeDeep