'Rose-Tinted Lenz' Generator...

[tim123]

Ok, a couple more pics:

RTL-6.gif
- A different shaped stator & rotor. This gives more surface area contact between the two.
- drive section is moved thru 90 degrees. I think it makes the machine more compact.
- doesn't look like a UFO, or an uncapped pyramid, much better

RTL-7.gif
- shows hows the flux will behave during the two coil polarities.
- Top pic - coil is same polarity as PM - so flux enters core extension (drive section).
   Extended core sections contain full flux from PM and coil.
- Bottom pic - coil is opposite polarity, so flux moves out of extension.
   Extended core sections are mostly empty of flux.

The drive rotor has to be 180 degrees out of phase with the main rotor. Here are the steps:

Main Rotor Approaching Stator:
- PM flux (S-N) moves out of stator & into rotor
- Coil goes N-S
- flux moves out of drive section
- drive rotor moves out of drive section (and is attracted into the next stator unit...)

Main Rotor Leaving Stator:
- PM flux (S-N) moves out of rotor & into stator
- Coil goes S-N
- flux moves into drive section
- drive rotor attracted into drive section

[gyulasun]

Hi Tim,

Sorry, somehow my eyes skipped the words 'ferrite-core'... and I considered the coil as having an air core.   

Now I have a question with your RTL-5.gif drawing: you mean the small rotor parts (which are also of steel material, labeled as 'drive rotor')  rotate together with the main rotor, right?  They are fixed to the same and only rotor shaft, correct?

If both yes, then I can accept the role of the drive rotor steel pieces: they help a little to enhance flux change in the coil core part of the stator (when the main rotor also passes by the magnet)  by offering a further alternative path for the magnet's flux to go towards the outer edges of the stator, hence steering flux away from the coil core part stator area. So to say: drive rotor steel pieces help 'empty' magnet flux in the coil core part of the stator.

To possibly enhance this flux-reducing effect in the coil part of the stator, perhaps you could position a small magnet on the back of each drive rotor steel piece, with the correct polarity to make those 'secondary' rotor parts slighly biased magnetically: they would be a N pole facing the variable zone of the stator at the left end and a S pole facing the variable zone of the stator at the right end.
Of course this biasing would increase cogging a little but I think this could be compensated for in an overal setup. Of course, really small and not too strong 'biasing' magnets should be used, to just increase attraction a little bit between the variable zone parts of the stator and the drive rotor parts.
(Notice: in this setup too, air gaps are a must between the facing surface areas of the magnet and the stator core to have the best match for maximum flux change in the coil versus extreme stator core saturation.)

rgds, Gyula

[gyulasun]

Ok, a couple more pics:
...

Hey Tim,

You seem to be improving indeed...     Keep it up.

Gyula

[tim123]

Hi Gyula,
  yes the two rotor section would be attached. In fact, I was just writing the following, (will have to think about ur other points, thanks)...

Not sure about this, but it occurred to me that it may be possible to get the drive effect on the main rotor.

First diagram shows the stator configuration. Second shows the polarity of the core either side of the rotor, as it enters and leaves the stator.

On entry:
- Coil goes N-S
- flux moves out of drive section
- rotor sees a single magnet on one side - and is attracted

On exit:
- Coil goes S-N
- flux moves into drive section
- rotor sees the same polarity on both sides - and (because it's central) is repelled.

Well, that's the idea anyway... Any advice gratefully received.

...Actually I don't think this'll work - because the rotor provides a full magnetic circuit between the two poles. I think the drive sections have to be separate.

[gyulasun]

Hi Tim,

I may have interpreted differently than you possibly meant the role of the 'drive rotors' in my above post for your drawing RTL-5.gif because you did not mention any timing for it (like a 180° shift for drawing RTL-6.gif) so I thought both the drive rotors and the main rotor apper near the stator at the same time. This is why I answered like that which I consider still valid i.e. the small sized 'drive rotors' help empty PM flux from the coil core area (especially with some small backing magnets of the correct polarity placed onto the small rotors).  And when the latter rotors leave the stator together with the main rotor, the PM flux will hopefully be able to snap back into the coil core area again.  I am not sure you assigned this kind of task to the drive rotors in RTL-5.gif though?

Will continue comments later tomorrow for the other drawing.

rgds, Gyula