Self accelerating reed switch magnet spinner.

[TinselKoala]

@Tinselkoala,


                    What's the operating frequency of the rotorless MHOP?

It depends on the orientation of the fields (polarity of coils). In the positive feedback mode it oscillates at a very stable 62.5 kHz but of course doesn't produce the collapse spikes, so no power takeoff is possible. In the negative feedback mode it operates in the same frequency range as with the rotor, 150-200 Hz or a bit higher, and makes powerful collapse spikes, as I illustrated in the video.
This is without cores in either coil.

[TinselKoala]

This is in the wrong place I know, but is this possible or is it trickery?
http://www.youtube.com/watch?v=c3I2zeoUbzg

Sorry I missed this when you first posted it.

Don't you find it interesting that it accelerates when he moves it to just the right position on the surface? Look at 3:35 - 3:45. This, I believe, is a definite "tell" showing that it is externally powered, either by some electromagnet under the table or maybe even by a jet of compressed air from offscreen.

[conradelektro]

Ring Magnet Spinner with a single LM311 Voltage Comperator

I managed to make a ring magnet turn nicely with a drive coil, a trigger coil and a LM311 (no transistor). The trigger coil has no core and is placed at a distance of 50 mm from the ring magnet. The drive coil has an iron core. Both coils are taken out from relays.

The circuit consumes about 16 mA at 12 Volt and about 12 mA at 9 Volt.

The ring magnet spins slowly with a 5 V power supply and very fast with a 13 Volt power supply.

The 2nF cap (from IN- to GND) and the 5K resistor over the trigger coil dampen oscillations which would prohibit the functioning of the circuit. I am sure that the crude dampening needs some more work, help is appreciated.

Attached are the circuit, a scope shot over the NPN transistor (inside the LM311) and two photos of my set up.

I got some more OpAmps to play with, but I started with the LM311 because it costs only EUR 0.30 and is widely known.

Greetings, Conrad

[synchro1]

@Conradelectro,


                        Very nice! So much simpler then the Bedini SSG and the four confusing coil leads. I wonder if you can get a rotorless MHOP effect just by removing the magnet spinner and pushing the coil faces toward one another?

[conradelektro]

@Conradelectro,


                        Very nice! So much simpler then the Bedini SSG and the four confusing coil leads. I wonder if you can get a rotorless MHOP effect just by removing the magnet spinner and pushing the coil faces toward one another?

I am just at the beginning of my tests and could not do much yet. But I will try the rotrorless MHOP effect as you suggested.

Unfortunately I have to travel over the coming days and further tests have to wait till next week.

The idea to use OpAmps (or Voltage Comperators) to drive pulse motors is very interesting. Since days I am trying to learn how to use OpAmps, a whole new world for me.

The output of an OpAmp can only drive small loads, but the driver coil I use has 280 Ohm DC resistance, which keeps the drive current down. The trigger coil has about 1K DC resistance.

Greetings, Conrad