STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Omega_0]

Sure, using pulse generator to compare power consumption with or without rotor is on my list of experiments, to be done with better rig and hardware. This is just a start.

Below are Comparative Results for one coil config with 200 and 400 turns respectively. The speed profile is similar, there is a jump in both cases. The current needed to reach the same speed is higher in case of the coil with less number of turns.

[Omnibus]

You don't have data for the input I and V, do you? It would be interesting to see if we'd get the same fine structure for the integrated curves as Steorn's. Of course, I and V of a pick up coil would be interesting too, to compare with the input. I'm getting a nice Tektronix DPO any moment now and will join the efforts.

[Omega_0]

No, the current and power measurements shown here are simple (Ipeak*dutycycle) and I ignored all fine transients in the pulse. I feel the rig is not good enough to measure the non-joule energy yet.

I'm improving my rig and once it starts going above 500 RPM on lowest possible current, I will start capturing the scope data into excel and integration will follow. Next thing would be to use Metglas cores. I don't have any at the moment.

Its a good news that you will be building, we need more dedicated replicators. People don't persist usually.
All builder have disappeared. If you guys are working underground, please invite me, I'm reinventing the wheel in a cave

[Omega_0]

Some readings on effect on RPM with core position. X axis is distance in mm from center line of magnet pair to center of the core). The negative distances are when core is moved towards center of the rotor. Relation seems to be parabolic.

I installed 4 coils finally and got 300 RPM, and I'm not happy about it. The total resistance has shot up and with 12 V battery the current is reaching just around the operating value, not above that.

The rig is showing its weakness, the pull of the magnets is very strong and the rotor yields and goes crazy. So no more experiments till I build a better rig.

[Omega_0]

Update:
Made a new rotor, it is smaller and more rigid. Unexpectedly it gave better results as compared to the bigger rotor. Its going 400-500 RPM with two coils and 4 magnet pairs. There must be some relation between rotor diameter and RPM. Need to find out.

I was trying to remove the cemf and no matter where I placed the coil, it produced a large cemf, except when I placed it very far away from the magnets. The rotor has S-N magnet pair polarity, i.e opposite poles facing the core. Surprisingly, changing it to N-N, same poles, made cemf almost nil.

So those who are using the pairs in S-N config may like to see the effect of using NN or SS config. Latter reduces the attraction a bit, but cemf is gone. (see the scope shot taken with two pairs in NN and two in SN positions, with rotor spun by hand and probes connected to both the coils)

I've also seen cemf disappear when the coils are connected in parallel. Need to confirm this once again though.