Has any one ever made a bifilar coil electro motor(or generator)?
And pulsed it at its resonant frequency?

jim murray his transforming generator, isn't that a bifilar?

start from 14 minutes

https://youtu.be/HK3JOlY0V8Y?t=14m

https://youtu.be/157Zno2T5LY

I dont know what to think of gerard morin but his generator is interesting.

he seems to use only the north pole of magnets.
In my work with the magnetic field of the bifilar coil i have seen the north side producing more voltage.
I think the north is generating a pressure vortex and south a sucktion vortex.

I need some distraction so i have decided to build a generator. based on 4 north facing magnets and 4 bifilar coils. the windings of the 4 coils will alternate clockwise and counter clockwise.

I ripped a stator out of a dc fan.
the magnets need to rotate, so i need something to fixate them in, and rotate the magnets. i will try using my dremel tool as a motor to turn the magnets

this is the magnet ring of the motor. 2x north 2x south. I might demagnetise them (heat)
and apply external magnets to get 4x north inside.

it fits on my dremel, so if i use 2 and glue them back to back it might work.

the magnet has a metal casing around it. thats not good for the field of ouside placed north magnets.

maybe it comes out when i heat it up

i just simply got the magnet out. now the metal ring is left. maybe keep it in and just make 4 cuts

stator in the casing without magnet

this is the magnet ring
it is flexible and it could be cut into 4 separate magnets, and put them back north facing inwards.

the magnet is very weak. i rather use a stronger neodymium.

also the metal ring would be bad

maybe combine the ferrite ring with a added magnet, to get the field near to the stator.

I would then still cut the ring into 4 pieces

the metal ring came out.

i found 4 matching magnets, marked the south black.

taped the stator 2 times round to create enough distance.

the magnets will be glued in.

glued in place with hot glue. the high temperatures are not ideal for neodymium magnets but it worked.

i removed the tape. the force is strong very hard transitions between the stators. but the opposite windings might work this problem out.

4x bifilar wound stators. per stator i used 2x 40cm wire.

I have more of these dc motors (fans) i could use a fan to rotate the magnets.
this would give me a nice way to compare the input and output

damn. it went so well.
i tried to measure inductance and capacitance. but the windings had a shortcut.
i wound a new set and it also had a shortcut...

need to rewire the hole thing. and use the plastic things for the stator (threw them out into the kitchen bin)

found them. now again wimding the wires. i now use 38 cm

thats better. first bifilar measured 52 pf when not connected. inductance 0.05mH when series connected. very big measurment erro with these values

total inductance of 4 bifilar coil alternating..
0.08mH again a huge measurement error.

i will test with dc if the stators are alternating in magnetic field

oh man i needed a break low blood sugar.

coils are now counterwound

hahaha
i glued another axis from another motor on top
and connected it to my dremel tool (fan was to weak)
then i hold my finger on the windings so the magnets would spin but not the stator.
hookes up the volt meter.
and yes it works. 0.74V ac  haaaaaaa
what a waste!but it was a fun build. :cool:

so far, using only north poles... not working.

oh ohw
it was even less 0.1v ac

Im going to give it another try with all the four coils clockwise wound.

I made a mistake . the windings are all clockwise.
the idea was to have them alternating. one more try

nope. not working.

reverse 2 magnets and rewire the coils...
see how the bifilar generator really works

why oh why did i use such a  small stator

strange
i reversed 2 opposite magnets to get alternating poles.
i rewired the bifilar stator coil so they were all clockwise wound.
but when i spin the magnets with my dremel tool,
there is no ac voltage. 0.1V
I would have expected more out of this.
i also hooked up my scope and there is a signal but very weak. also its not a sine
its a peak with a half sine. very weak.

the inductance is very low. maybe i needed more windings. the wire is to thick.
or would it have to do with the bifilar windings?

i could attach AC voltage and see if it spins, with higher currents

oops little accident. i spinnend the magnets and while turning off i turned it to a higher speed.
3 magnets flew of. one in my face. no real damage to me but it was scary.

I rewired took the same length of wire and wound the stator. 30 windings per stator.
total around 0.1mH

used the weak magnet from the dc motor. but no real voltage.

why isnt this producing voltage?

one more try with the neodymium magnets. first reattach them

Posted: June 1st, 2017, 02:58 AM

ok... maybe i have to try with the original windings of the dc motor. remove the hall sensor.
those windings are alot more and the wire is super thin.

i doubted my meter. but it works

no more fun with this. frustrated. back to the other projects

hi,
thanks for the sharing
and
great try anyway
cheers

thx alloytam.
next time no iron
and based on the bloch wall