Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[listener192]

Attached are two pictures.
The first shows the EMF waveform in a conventional generator with a North and South magnet alternately passing a coil.
The second shows a scope shot of the EMF (loaded), from a 600T test coil, about 5 slots wide placed inside the stator.
The main difference between waveform's, is the presence of signal during the inter-magnet period.

In the conventional generator, the signal during this period drops to almost zero however, in the DZ style generator, this period is occupied by the pulsed waveform, although the stator coils in registration with the test coil are not energized.

The only source of pulsing during this period is from the coils creating N & S poles, out of registration (up to 90 degrees) , see third picture that show the current on the coils at 90 degrees.The current clamp was just applied over the coil loops to show the relative time of current, so this is not a calibrated measurement of current.
I have not shown this, but placing the clamp over the coils in registration, shows there is no current on these coils during this period.
This reduces the magnitude of change, of the composite 60Hz waveform, resulting in reduced induction.
Each pole is 7 coils wide so the inter pole gap is 8 coils.

For this test coil there is a huge airgap, so its not clear why this flux is wanting to cross the gap. I also removed the coil core and repeated the test and it was the same.

This requires further investigation to understand why this is happening.     
L192

[Jeg]

Hi. Just a small demo of the TTU v.1. Everything is ready for the funny part which is the programming.

30 primaries and 6 secondaries.
25 steps per half cycle right now. No limit in stepping. (The more the stepping the less the input current). Variable output frequency and input current. Variable input frequency.
Square wave output.
2 X PSU inputs for 24V, 12V, and 5V supplying.


https://www.youtube.com/watch?v=t6xv7qhcdTM&feature=youtu.be

Regards

[listener192]

Hi. Just a small demo of the TTU v.1. Everything is ready for the funny part which is the programming.

30 primaries and 6 secondaries.
25 steps per half cycle right now. No limit in stepping. (The more the stepping the less the input current). Variable output frequency and input current. Variable input frequency.
Square wave output.
2 X PSU inputs for 24V, 12V, and 5V supplying.


https://www.youtube.com/watch?v=t6xv7qhcdTM&feature=youtu.be

Hi Jeg,

Substantial build and you stuck with the alternative design, respect for that!
This should have the advantage of keeping the flux in the stator, until in registration with the rotor.

Regards
L192

[Jeg]

Thanks L192.
Device has designed with no intention of using internal fixed coil. In the video i take the output through 6 of the coils, all in parallel. But I can also use the primaries as secondaries the same time. In general many options for testing. I use low side and high side switches some of them with back to back mosfets as it has been discussed before some pages.
Overlapping pulses at the one third of the pulse.
15 coils driven as CW and 15 coils as CCW.
I have already used between 500 and 10 steps per half cycle. As I said the more the steps the less the input current.

Regards

[listener192]

I adjusted the proportions of my FEMM model to more accurately represent my stator.
Driving the 2 x 7 coils at 1.5A average (this would be a much higher pulse current) each, brings the stator up to 1.5T and the start of saturation for M15 steel.

I modeled a 0 deg and a 90 deg case (note: coils relative to rotor). Easier to fix the coils and move the rotor. In the 90 deg case you can see that there is no flux through the rotor, only a very low air coupled flux (0.045T) through the side of the rotor.

Also attached, shot of coil composite coil current (dark Blue) & output EMF (loaded). Used a large current sensor around the coil cables.

Further measurement shows that there is a primary power supply current draw that is coincident with this period but does not show up coincident with the composite coil current.
I will start working through the individual bridges to determine which ones are responsible for this.


L192