One magnet no bearing Bedini motor

[Pirate88179]

Jonny:

I have not been able to successfully replicate your device as of yet.  I wired it up twice and still can not get or maintain rotation.  I am using an iron core now made up of nails (same as my Bedini) and Lidmotor's coil design (same as my Bedini).  Maybe I have to much resistance to the base?  I am using a 330 ohm base resistor and on my other Bedini I used 460.  I have a 5k pot in series with the base resistor.  I have tried moving my core from the top down in small increments to no avail.  My coil sings when I try to get the magnet to rotate but....no dice.  Any thoughts?  I am using 2 rechargeable 9v nicads so i should have enough juice.  Thanks.

Bill

[xenomorphlabs]

I have connected the 3rd aircore coil and put it into a cap that itself powers a 555 timing circuit.
The circuit runs unstable and keeps resetting itself probably due to the varying input voltage.
Once any of the coils is under load then the magnet slows down and the 10k pot resistance at the transistor base needs to be lowered allowing a higher base current to push the magnet harder.

So i conclude that putting a constant load behind the pickup coils is inefficient due to the increase in power consumption of the primary circuit.

Tapping off the energy from the caps once every 2 seconds or so with a timing cap discharge circuit will hopefully keep the magnets rotational speed up and still allow decent pickup-coil battery charging.

Now i need to find such a circuit that works with this application.

I am trying to get this to work (attachment):

[xenomorphlabs]

Bill: I have the same trouble starting the rotation. What helps me is to lower the 10k pot resistance to nearly zero, then there is enough power in the coil to kick the magnet. Once it is stable, turn the resistance up again or it will lift off 
Hope that helps you

[jonnydavro]

@pirate.Hi Bill.Try Xenomorph's sugestion as mine is exactly the same and if no luck Can you try swapping the 380 for a 100ohm and use 2 variable resistors,a 1k and a 10k.Try this and we will go from there but we will get you going.
@Xenomorph.Those load tests show that mr lenz is alive and well so we will have to give some thought to the best way to utilise the coil outputs and i see you have already made a start.Nice.Regards jonnydavro

[gyulasun]

I have connected the 3rd aircore coil and put it into a cap that itself powers a 555 timing circuit.
The circuit runs unstable and keeps resetting itself probably due to the varying input voltage.
Once any of the coils is under load then the magnet slows down and the 10k pot resistance at the transistor base needs to be lowered allowing a higher base current to push the magnet harder.

So i conclude that putting a constant load behind the pickup coils is inefficient due to the increase in power consumption of the primary circuit.

Tapping off the energy from the caps once every 2 seconds or so with a timing cap discharge circuit will hopefully keep the magnets rotational speed up and still allow decent pickup-coil battery charging.

Now i need to find such a circuit that works with this application.

I am trying to get this to work (attachment):

Hi,

Thanks for the update.  I agree with a periodic discharge of a puffer capacitor, this method surely presents a much less load to the main energy source: the battery feeding the transistor.

If you could obtain the CMOS version of the 555 timer like LMC555CN ( National Semiconductor) or TLC555 (Texas Instr.) then the current consumption of your above proposed circuit would drop from 8-9mA of the NE555 to under 1mA, this may also count. Also the resistor R3 (you show it as 100 Ohm) could be raised in value into a few  kOhm range, usually the opto diodes work with 5-10mA forward current, now the 100 Ohm forces about 100mA peaks from 12V. 
I mention these simply to economize on input power whereever it is possible.

rgds,  Gyula