The Robert Adams Pulse Motor Design Review

[Slovenia]

Turns of Wire on Coil

Robert Adams didn't go by turns of wire on his coils but by wire resistance instead. As you said Elias, this is critical indeed.

[SkyWatcher]

Hi folks, Hi elias, merry christmas. elias, that could be whats happening in the Adams motor, reminds me of Thane heins effect. I still think some of the things in that long quote i posted could apply.
Anyway theory aside, those smaller 1/4" diameter steel bolt cores are not going to be good enough. It needs more copper per coil and the steel washer bobbin ends i don't think are helping matters.
So I dug up the old coil/cores I used on the Adams motor that ran cold in the past and these use 24 gauge wire with 5/16" diameter steel bolts with much more copper coil and make a much more powerful electromagnet for much less input. And when placing by rotor magnet, it repels form magnets with far more force. Considering the core is bigger and it has more resistance meaning less input, shows we need more copper, but probably not too much.
Also these better coil/cores have core lengths twice as long and the coil has more depth. I definitely think the paperclip test is a good guide for coil length/depth and roughly the diameter of the magnet or a little greater.
Time to make new coils.
peace love light
Tyson

[elias]

Hi folks, Hi elias, merry christmas. elias, that could be whats happening in the Adams motor, reminds me of Thane heins effect. I still think some of the things in that long quote i posted could apply.
Anyway theory aside, those smaller 1/4" diameter steel bolt cores are not going to be good enough. It needs more copper per coil and the steel washer bobbin ends i don't think are helping matters.
So I dug up the old coil/cores I used on the Adams motor that ran cold in the past and these use 24 gauge wire with 5/16" diameter steel bolts with much more copper coil and make a much more powerful electromagnet for much less input. And when placing by rotor magnet, it repels form magnets with far more force. Considering the core is bigger and it has more resistance meaning less input, shows we need more copper, but probably not too much.
Also these better coil/cores have core lengths twice as long and the coil has more depth. I definitely think the paperclip test is a good guide for coil length/depth and roughly the diameter of the magnet or a little greater.
Time to make new coils.
peace love light
Tyson

Merry Christmas to you too Tyson,

Well, What about using welding rods, as are used for the SSG?
Yes cores tend to lag the induced voltage a bit thus, after a certain speed, the Lenz Force might be of assistance, instead of hindering. Also current starts flowing in a coil with a bit of hesitation thus making it lag even more ...

[SkyWatcher]

Hi folks, Hi elias, thanks for that information. I thought about the welding rod, then I recall reading Adams mention that he used solid core at some point and I see why. Reason is that the Adams motor I built a few years back used the same steel bolt cores I am using for my new coil/cores and they ran cold, as did the transistor with no heatsink. So I see no reason for laminate type cores in these setups. The new coil I made is 24 gauge, 5/16" diameter x 2-1/2" steel bolt at 6.8 ohms. It packs way more punch than the other coil I showed and will draw less input. I'll make 4 coils to test on motor. Here is the coil/core.


Uploaded with ImageShack.us
peace love light
Tyson

[toranarod]

my Christmas Present

wow guys
My wife Brought me a digital storage oscilloscope in the 40 Mhz range.
for Christmas. I am stoked.
get some good data now for sharing.

cheers

[rave154]

you lucky sod

[elias]

wow guys
My wife Brought me a digital storage oscilloscope in the 40 Mhz range.
for Christmas. I am stoked.
get some good data now for sharing.

cheers

Congratulations Rod, and merry Christmas, and a question: As I recall Robert Adams uses South poles for his motor, have you experimented with both polarities?

[elias]

Hi folks, Hi elias, thanks for that information. I thought about the welding rod, then I recall reading Adams mention that he used solid core at some point and I see why. Reason is that the Adams motor I built a few years back used the same steel bolt cores I am using for my new coil/cores and they ran cold, as did the transistor with no heatsink. So I see no reason for laminate type cores in these setups. The new coil I made is 24 gauge, 5/16" diameter x 2-1/2" steel bolt at 6.8 ohms. It packs way more punch than the other coil I showed and will draw less input. I'll make 4 coils to test on motor. Here is the coil/core.


Uploaded with ImageShack.us
peace love light
Tyson

Then how do you eliminate the eddy drag? Or it might not be so high as the core face is not so large. I might use 16mm diameter laminated iron for the core, which are used as shafts.

[toranarod]

Congratulations Rod, and merry Christmas, and a question: As I recall Robert Adams uses South poles for his motor, have you experimented with both polarities?

I use south pole but i have no reason other than thats what Adams recommended. i have not bothers to experiment with poles.
cheers rod

[toranarod]

Then how do you eliminate the eddy drag? Or it might not be so high as the core face is not so large. I might use 16mm diameter laminated iron for the core, which are used as shafts.

I have been testing my motor today. Its been running on 24.67 volts all day
and drawing 35 mill amps. Making 20 mill amps on the generator coils.

I have some new electronics I have been testing with the motor.
If the setup is right all circuits run cold and can be small and low watt technology.

This is the new circuit

[SkyWatcher]

Hi toranarod, nice electronics there, so the battery is still maintaining its voltage after all this time, nice. Hi elias, as toranarod said and as I've observed in the past, all the typical losses do not matter. Maybe they are converted into useful output in some way. If eddy current or hysteresis was an issue with solid iron or steel cores in the Adams motor, then my motor cores would not have been cold to the touch, same with copper coil. Though, obviously laminated is fine, since that is what toranarod is using. Made 2 coils already, need 2 more.
peace love light
Tyson

[toranarod]

Hi toranarod, nice electronics there, so the battery is still maintaining its voltage after all this time, nice. Hi elias, as toranarod said and as I've observed in the past, all the typical losses do not matter. Maybe they are converted into useful output in some way. If eddy current or hysteresis was an issue with solid iron or steel cores in the Adams motor, then my motor cores would not have been cold to the touch, same with copper coil. Though, obviously laminated is fine, since that is what toranarod is using. Made 2 coils already, need 2 more.
peace love light
Tyson

this is all the data I have on my coils

Wire 18 AWG 5.6 mH coil R .5 ohm with iron core
theses coils are speaker cross over net work coils



theses coils are driven by the mosfets on the circuit board in the photo
and they run cold. As you can see very small no heat-sink they are under no stress.
But run the coils out of the motor with no magnets switching on same PWM duty cycle.
and they over heat and burn out. this is the kicker

.

[SkyWatcher]

Hi toranarod, thanks for the extra pics and information, I think that says a lot and I know others have seen the same thing, including me. I built that solid state 'POD' (power on demand) device many years back and when placing doughnut ring ferrite magnets around the coil/core and another normal shaped magnet at face of core to repel or demagnetize, then you can get it to run cold when pulsing with say a 555 timer as I did, though I forget if just using a magnet at face of core with small gap worked as well. Still working on the motor coils.
Well happy holidays, off to eat some turkey.
peace love light
Tyson

[RustyP]

Hi Guys that all sounds very good. Both Robert and Howard Johnson independently came to the conclusion the the magnet could also be made to pulse at theoretically 1000 times its base strength. Both believed they had achieved somewhere between 200 and 250 times the magnets base strength. Thus there is a lot of potential when you hit the all right combinations in these motors. For his 10KW machine Robert was using 0.35mm Wire in his coils and each of the 2 coils was exactly 36 ohms. In series he has 72 ohms. He was not interested in counting turns but was working on a different theory of operation in these designs. Regards Russ

[toranarod]

Hi Guys that all sounds very good. Both Robert and Howard Johnson independently came to the conclusion the the magnet could also be made to pulse at theoretically 1000 times its base strength. Both believed they had achieved somewhere between 200 and 250 times the magnets base strength. Thus there is a lot of potential when you hit the all right combinations in these motors. For his 10KW machine Robert was using 0.35mm Wire in his coils and each of the 2 coils was exactly 36 ohms. In series he has 72 ohms. He was not interested in counting turns but was working on a different theory of operation in these designs. Regards Russ

I find your comments about the base strength of the magnets being exceeded
by 200 times. I would like to understand this more. is there a doc on this?
thanks for the post
Rod