The Robert Adams Pulse Motor Design Review

[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, 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]

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

[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

[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.

[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?

[rave154]

you lucky sod

[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

[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

[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, 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

[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.

[elias]

Rodney,

I read your document (999kB). Thanks for sharing!
I wonder, what wire gauge do you use? I currently have #24 wire at hand, (0.5mm dia). would it be fine for this? How many turns? I think that these things are critical for a good construction and to make the effect happen. Would you recommend designing a higher voltage system? about 200-300 volts? or you think that the effect primarily constitutes batteries?

Elias

[toranarod]

Hi

It seems to me that Adams takes advantage of magnetic hysteresis of the iron core. There is an action and a reaction, the action being the approach of the magnet, and the reaction being magnetization of the core, but there is a lag and a delay between the action and reaction in the real world, a time delay of supposedly dt.

So, when the magnet approaches the core the core gets magnetized and it retains it s magnetism for a short amount of time after the magnet passes by. So at a certain speed, the magnetic lag becomes significant and it works as a driving force for the coil, when the Mosfet switches., this implies that we must take into consideration the magnetic lag of hysteresis of the core material.

It is so simple, If the reaction, or the Lenz law worked simultaneously by inducing a magnetic field in the core, the Adams motor might not have been possible, but it seems to me that the magnetic field is "stored" for a brief moment in the core and the induced voltage in the coil is used as a driving force for the motor after the magnet gets passed the core.

That may be why accurate "timing" is needed.

Elias

Thank you
That is one of the best explanations I have heard put forward.
Great description.

[elias]

My take on the Adams motor

Hi

It seems to me that Adams takes advantage of magnetic hysteresis of the iron core. There is an action and a reaction, the action being the approach of the magnet, and the reaction being magnetization of the core, but there is a lag and a delay between the action and reaction in the real world, a time delay of supposedly dt.

So, when the magnet approaches the core the core gets magnetized and it retains it s magnetism for a short amount of time after the magnet passes by. So at a certain speed, the magnetic lag becomes significant and it works as a driving force for the coil, when the Mosfet switches., this implies that we must take into consideration the magnetic lag of hysteresis of the core material.

It is so simple, If the reaction, or the Lenz law worked simultaneously by inducing a magnetic field in the core, the Adams motor might not have been possible, but it seems to me that the magnetic field is "stored" for a brief moment in the core and the induced voltage in the coil is used as a driving force for the motor after the magnet gets passed the core.

That may be why accurate "timing" is needed.

Elias