ORION- Released Into the Public Domain

[SEYCHELLES]

That is correct. I am trying to simulated your explanation of your  rotor rewiring . But i think i failed miserably. The switches would be mounted external of the rotor shaft and is activated by cams on the rotor shaft. Or could be done electronically.

[Jim Mac]

That is correct. I am trying to simulated your explanation of your  rotor rewiring . But i think i failed miserably. The switches would be mounted external of the rotor shaft and is activated by cams on the rotor shaft. Or could be done electronically.

That is interesting.  You are tryng to manipulate the moving field by altering the polarity on the brushes at exact moments without the need to rewire the armature?

That would require some deep thought on how it all works out.  But the setup wouldn't be difficult, an H-bridge can be used to swap the input brush polarities at exact rotor positions by use of a hall sensor and small rotating magnet array.

Something to think about!

[Jim Mac]

That is correct. I am trying to simulated your explanation of your  rotor rewiring . But i think i failed miserably. The switches would be mounted external of the rotor shaft and is activated by cams on the rotor shaft. Or could be done electronically.

That is interesting.  You are tryng to manipulate the moving field by altering the polarity on the brushes at exact moments without the need to rewire the armature?

That would require some deep thought on how it all works out.  But the setup wouldn't be difficult, an H-bridge can be used to swap the input brush polarities at exact rotor positions by use of a hall sensor and small rotating magnet array.

Something to think about!

I drew it out.  As far as I see, if the brushes flipped polarity with each contact change, the magnetic field would not rotate, but stay rather still from an outside perspective and just keep flipping polarities.  To get rotation or movement in the field, either the brush position to the individual coils must change (rotating the brushes), or the coil to commutator contact alignment must follow a gradient of change.

If the Brushes stay still and the Commutator contacts stay aligned to the coils, there is no movement of the field by flipping polarities- only reversals.

There may be a use for this, I am not saying it is useless. But it would not create a rotating magnetic field.

[samoye]

Getting a stator and an armature that fits is difficult.

[Jim Mac]

Getting a stator and an armature that fits is difficult.

Could be.  Treadmill and small winch armatures fit inside some induction motor stators relatively well.  If you don't have a collection of different motors to mix and match, yes it can be difficult to match up.

Just using a universal motor's stator from which the armature came is also a possibility, but you are limited to 1 phase output.

[olegzhu]

Джим , а как перемотать статор под много фаз под каким углом их мотать , под таким как ротор 180 градусов ? Или 90 градусов как расположены щётки ?

Translation by admin:

Jim, how do I rewind the stator for multiple phases? At what angle should I wind them?  Should it be the same angle as the rotor, 180 degrees? Or 90 degrees, like the position of the brushes?

[Jim Mac]

I am not sure what will work best.  My build used a pre-wound induction motor stator that had 2 phases shifted by 90 degrees. There may be other configurations that work better.

If you wound the armature with full pitch, then the output pitch is pretty much wide open to choose.

[olegzhu]

If you wound the armature with full pitch, then the output pitch is pretty much wide open to choose.

Как понять намотка полным шагом ?

[nagual]

"Hi Jim, have you achieved self-powering yet?
In this device, the commutator has to reverse the magnetization of the two armature coils at every interval. However, the 'Lockridge device' uses two sets of brushes where the brush width is narrower than the commutator spacing. The second set is used to extract Back EMF.
Do you think it would be better to modify it this way? It seems like this configuration wouldn't require changing the commutator. My reasoning is that after passing the extraction brushes, the magnetic fields in the armature and generating coils are cleared, so the power supply brushes get a fresh start every time. In this case, there isn't much difference between a rotating armature and a fixed one. When rotating, the armature generates a magnetic field that couples with the generating coils, and the Back EMF pushes back. However, if the magnetic field doesn't rotate, it is only generated once.
Disclaimer: My understanding of this is incomplete, so I apologize if any of this is misleading."