Simple to make Hilden-Brand style motor

[i_ron]

It works!

Hi All,

Here is the video link


http://www.youtube.com/watch?v=fb-wvvWIecg

and a couple of jpg's, #4 is the hinge detail

Ron

[Nali2001]

Looks tha bomb as usual!
Works nice as well. Love the top extra flux guides, that's a good little extra.
I know how much work it is to build such a machine so you have my deep admiration!
Any data on input and such, little scoping?

Great work man!
BUT:
After detailed video inspection I noticed you partially trapped a mosquito...

[i_ron]

Looks tha bomb as usual!
Works nice as well. Love the top extra flux guides, that's a good little extra.
I know how much work it is to build such a machine so you have my deep admiration!
Any data on input and such, little scoping?

Great work man!
BUT:
After detailed video inspection I noticed you partially trapped a mosquito...

Thanks Mate!

Now I can assure you no flying insects were harmed during the filming of this video!!!  LOL

The end of the bench is in direct line of fire from the lathe... and what you see there is a tiny blue chip, steel of course... and an amazing demonstration of the extent of the flux field.

Ron

[gyulasun]

Hi Ron,

Hats off for your device, excellent job! 

Is the current draw changing when trying to load the shaft I wonder.
Yes, seeing a scope shot on the pulses across the coils is a good idea from Steven if you also agree... 

Gyula

[i_ron]

Any data on input and such, little scoping?

Well as usual my "good" ideas don't always work out. I am using a A1212 hall which is a latching device that turns on with a south pole and off with a north pole. Works fine as you can see but IF i put a diode across the coil the spike will happen in the wrong pulse! (code wheel has two magnets, N, S, 180 degrees)

I have four coils, two top and two bottom (coils in series) so am just low side switching. But there needs to be a dead band in between the pulses for the spike to either aid, or be recovered, not happening.

So it is running with no diode, no recovery.

At 9 volts it is running at 277 RPM and 490 RPM at 18 volts, for a total of 100% on time. (at 2 amps?)

On a static test at 9 volts it won't pull in. At 12 volts it just pulls in, at this gap, .3 inches  (7.7 mm) which is more that mac and keko's I think, hence the extra flux guide on top. But it runs at 9 volts because of the flywheel.

So I guess I need to go back to opto switching for control over pulse length

Ron