Confirming the Delayed Lenz Effect

[conradelektro]

Yes very nice platform, what's your maximum rotor speed and the maximum corresponding input ?
All the best,

DC.

My design was an exercise in low power consumption, therefore the drive coils have a high DC resistance (very many turns with thin wire, coils from relays).

The highest turn rate with a 9 Volt battery is about 800 rpm (revolutions per minute). With a 2.2 Volt battery it just turnes slowly.

See http://www.youtube.com/watch?v=MEEjlYvZ5OM

For a test of the "delayed Lenz effect" I would of course need coils with much less turns (and stronger wire) and it will need some Watts to turn a bigger rotor very fast (e.g. at 5000 rpm). This will also need a more careful mechanical layout.

And that is the reason why I will probably never build it. My skills in mechanics are rather low. I have some bearings from bigger old hard disk drives which could be used. Ballancing the rotor (to avoid vibrations) is difficult but very important at high rpm.

Greetings, Conrad

[DeepCut]

One more thing Conrad, i switched from an inductive drive coil to a DC motor (for my multi-magnet rotor) and got better results, but it is a good motor, here on ebay in the UK :

http://www.ebay.co.uk/itm/12v-DC-electric-motor-UK-SELLER-/110739940158?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item19c89d633e

An easy way to see AUL is to get a diametric magnet and spin it with one of your drive coils, mine gets up to 40,000 RPM so is really good for seeing the effect in a single coil, i stuck mine on a carbon rod axle and used miniature flanged bearings sunk into holes in the perspex supports :

http://www.mediafire.com/view/?ix12bdfu0ypv1e2

I'm working on a coil that makes the rotor go faster than when there is no coil/core assembly present.


atb,

DC.

[synchro1]

Deepcut,

A single wrap directional coil has an ingrained pole, unlike the bifilar series wraped. The rotor magnet polarity determines the pole in the bifilar. Where did you buy those flange bearings?

[DeepCut]

Conrad, for acceleration-under-load (AUL) you need lots of turns (the way i do it), but the important thing is the time constant of the coil.

Watch the OUG videos i linked to on my channel, he explains it all.

You can easily build a good rotor, mine are just cheap bearings plus a threaded brass rod with nuts and washers, all off ebay and not hugely costly. My mechanical skilss probably aren't much better than yours.

Do watch the OUG videos and my videos that show AUL in different devices.

This is all i've been doing since 2010 and i love talking about it/answering any questions that i can and wil gladly help you get something off the ground (not that i have antigravity yet !).

Also, check my long post earlier where i posted my programs and spreadsheets that help with design.


atb,

DC.

[DeepCut]

A single wrap directional coil has an ingrained pole, unlike the bifilar series wraped. The rotor magnet polarity determines the pole in the bifilar.

I can't see how that is so, unless you have the two halves of the coil going in opposite directions ?

The induced pole in a coil depends on its winding direction and the magnet passing it (i know i don't need to tell you this i am just saying it for clarity).


atb,

DC.