170 watts in - 1600 watts out - looped - Very impressive build and video

[listener191]

I edited post 373 to add another solution for a better distributed sine.

L192

[listener191]

For those that want to implement the half bridge ladder scheme that Pierre uses, It would seem the the L298N is still the lowest cost solution.

Tie together OUT 1 and OUT 2 and tie together In1 and In2.

Repeat for other side of L298N.

This should be Ok as the manufacturer already permits paralleling the bridges.

This now gives you two independent half bridges, with each Enable input turning off both transistors.

This will then require 36 boards instead of 18 but it is the cheapest solution I can find, unless you want to build your own half bridge boards, which will likely be more expensive.

The combined output stages will provide about 3.5A of continuous current capability.

L192

Correction to the above.

There are 72 switches required and  with the above modification there are effectively 4 switches in each L298N ( two half bridges), so 18 L298N boards will be sufficient.

L192
 

[konehead]

Hi everyone
I made again another drawing, this one shows a 30 pole stator frame, like what Gotoluc is working on (and also I have back in Seattle and two other people I know have also who want to try this rotating field DZ generator by Pierre)
So anyways, this drawing is supposed to show my idea of good way to pulse just one of the 30 sequential pulses per one rotation and is meant to save a lot of switches....maybe all the extra switches Pierre shows is necessary for the big OU effect I don't know for sure but here is how I would do it not to say how I would do it is going to be the best way in end product.
So note in drawing all 6 NSNSNS phases are connected in one string, all connected in series (could do parallel or series and paralleled depending on the impedance you want and thickness of wire you use to wind)
Also note that one phase is Left Hand Rule and the next one Right Hand Rule winding direction to create the NSNSNS situation of the 6 phase pattern.
Now you need just one H switch of 4 switches, to fire all 6 phases in alternating DC, not 24 like Pierre shows....perhaps this will upset the whole thing perhaps not but is a lot simpler to do...I would guess still connect all the diodes as usual to pull out not only any backemf/recoil/flyback, (but seems to me actual backemf/recoil/flyback collecting/steering  diodes only needed on the switches themselves however)
HOWEVER each phase is sharing slot with neighboring phase, and there is that N goinb one way through that slot, and S going other way through same slot and someone else was mentioning this too earlier, and this will create a BUCKING situation there, and to me this also creates soething just like a "shorted" coil too....the scope wave-forms Pierre shows and is concerned about and wants to fix (Pierre is suggesting to Luc to not have shared slots anymore and separate the winds and Luc is worried this change may upset the whole setup)
Anyways these scope wave forms really resemble my experiments with coils in generators shorted at the sinewave peak periods!  And the voltages to fill up caps goes from somewhere around X20 to best I have heard is X 50 when the peaks are shorted....Pierres scope shots show the same flurry of hyper-ringing towards and at the peaks of his messy sinewave!! So "perhaps" this IS a part of the OU effects he gets - the shared slots work to create a shorted-coil situation is what I am saying, and this creates much more voltage and joules to be filling up the caps, much faster, and of higher voltages than would be normal so "perhaps" the N-S sharing of common pole slots is doing this (maybe not)
Here is drawing of my idea for pulsing one phase, of the sequentially pulsed 30 phases:

[dole]

There are 72 switches required ...

My apologize,  Nr.switch = Nr.coils x 2

L298N:
Motor A truth table ENA             IN1         IN2         Description
0             N/A       N/A       Motor A is off
1             0             0             Motor A is stopped (brakes)
1             0             1             Motor A is on and turning backwards
1             1             0             Motor A is on and turning forwards
1             1             1             Motor A is stopped (brakes)

Motor B truth table ENB              IN3         IN4         Description
0             N/A       N/A       Motor B is off
1             0             0             Motor B is stopped (brakes)
1             0             1             Motor B is on and turning backwards
1             1             0             Motor B is on and turning forwards
1             1             1             Motor B is stopped (brakes)

   
ps.
Thanks for BTN7960

d.

[konehead]

hi everyone
Here is another drawing this time of the five steps of field rotation in a 30 pole stator wired to create 6 poles NSNSNS.

Also this helps as guide  to see where stator windings go and stretch to and from in the stator if rewinding a 30 pole stator...

I don't know if each 12 degree step in a rotation should be of alternating polarity or not, maybe the polarity of all 6 poles should change after the 5 steps or change every step seems like you would make more power with each step changing all 6 polarities all at once on each step but this is not shown here (changing polarities each step so 30 times in a revolution)