Mostly Permanent Magnet Motor with minimal Input Power

[gyulasun]

Luc
The current flow from the flyback from an inductor(coil) remains in the same direction,but the voltage polarity invert's. The answer as to how to capture the flyback and use it again is right there in Bendini's SSG pulse motor circuit.Just swap the charge battery out for a good size cap,and you have your power for your reverse pulse right there in the charge cap.You could actually use a double acting relay to achieve the switching-infact i have the perfect device to achieve this switching and collecting of power for your setup.I used it in the little moter bellow.You will also notice i use the term backEMF where i should have said flyback collection-the days befor i knew the difference between the two. So insted of using the flyback to run the LED,you can collect that in a cap,and use it to pulse your reversing coil.

https://www.youtube.com/watch?v=Z4VJG8-9izQ&list=UUsLiBC2cL5GsZGLcj2rm-4w

Hi Brad,

If I got it right, Luc drives his moving coil from the output of a full H bridge (to have current hence pole polarity change in the right moments as the coil reaches the ends of its course) so this involves ground independent coil ends in his present setup. So to catch the flyback pulse across such coil you have to use a circuit to handle that ground-independently.
To solve this, perhaps the simplest thing would be to use a bifilar coil to get the exact "image" of the spike in the coupled coil. I mean one coil in the bifilar is the normal working coil and the other (identical) coil in the bifilar will be a ground independent output for the flyback pulse. This solution may also help to add this captured energy to the input voltage source perhaps more easily than with other circuit variants where there is no such output coupling coil.

Gyula

PS  Sorry I have had no time to watch your above video so if you have a double coil in it, then ... I     

[telecom]

Hi Luc,
these magnets should do the job:
http://www.supermagnete.de/eng/block-magnets-neodymium-large/block-magnet-50.8mm-x-50.8mm-x-25.4mm-neodymium-n40-nickel-plated_Q-51-51-25-N

[tinman]

Hi Brad,

If I got it right, Luc drives his moving coil from the output of a full H bridge (to have current hence pole polarity change in the right moments as the coil reaches the ends of its course) so this involves ground independent coil ends in his present setup. So to catch the flyback pulse across such coil you have to use a circuit to handle that ground-independently.
To solve this, perhaps the simplest thing would be to use a bifilar coil to get the exact "image" of the spike in the coupled coil. I mean one coil in the bifilar is the normal working coil and the other (identical) coil in the bifilar will be a ground independent output for the flyback pulse. This solution may also help to add this captured energy to the input voltage source perhaps more easily than with other circuit variants where there is no such output coupling coil.

Gyula

PS  Sorry I have had no time to watch your above video so if you have a double coil in it, then ... I 

Hi Gyulasun

That is why i suggested using a double acting relay-to isolate the ground between the two stages.But the double wound coil sounds like a good idea aswell-dont really like calling them bifilar,as thats not quite the  right term.

[gotoluc]

Hello fellow researchers

sorry for the delay in reply. I was away at a weekend retreat.

I do agree there should be no OU in this setup but you have to agree that it's a different design then the classical stuff, with no cogging,  the coil between opposing magnets and a stable Inductance throughout the coils movement. So maybe it's worth a try. We'll never know till we try!

@ TinMan very glad to have caught your interest and couldn't be happier to work with you and see your replication a la TinMan.

@ Gyula I have thought about a double wound (bifilar) coil to Isolate the flyback. My latest test video the coil is bifilar to test these kinds of things but it was connected in parallel to have less wire resistance. A possible downfall could be the double weight of the coil. It all needs to be tested but glad it has some hopes up.

Luc

[tinman]

Hi Luc
Is there a schematic for your setup here some where?