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

[pmgr]

I have simulated the magnetic field in his stator and the output coil


Assuming he has six coils switched on at a time, e.g. 1-2, 13-14, 25-26, you will get three poles in the stator and thus three sine waves in the output coil per one full rotation of over the stator.


Please see the attached animated GIF for animation (you will have to save the GIF file to your computer and open it with the regular windows built-in Picture and Fax viewer to see it animated; animation speed will depend on your processor speed; let me know if it is spinning too fast and I will slow it down for you). See the JPG for the flux.


PmgR
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[listener191]

Hi Pmgr,

His stator has lap windings with about an 8 slot pitch, so no slot to adjacent slot coils as you have shown. Nice simulation by the way.

It is possible that he is energising two adjacent lap coils per phase and just letting the flux return through the stator, or he could be energising an opposing coil at 180 deg for each phase.

I assume this is FEMM. Can you make the .FEM file available?

Regards

L192

[listener191]

Hi PmgR,

One other thing you could try, is to simulate the Counter flux through the central (rotor) core.

Just set up some current through that output coil, so it opposes the energizing flux. My theory is that when the flux is out of alignment with the rotor, the rotor steel will steer some of the counter flux due to the load, straight through the unenergized section  of the stator i.e. not all of the counter flux will be returned through the energized section.

Regards

L192

[konehead]

Hi all especially Luc!
Here is simple JPG drawing of 36 pole stator, and fixed-rotor like what Pierre has going on....
Can you use this drawing as easy reference to find out exactly what is the pattern of the pulsed stator pole winds?  (such as 1 and 2 and 12 an 13 and whatever) All I know is it is "6 magnetic fields" right now and there could be lots of different ways to do that.
Also I wonder what the pulse width is both percentage of on-time to off time (duty cycle)...t also what it is in milliseconds on and off too migjht as well know both...
Thanks a million for being the go-between and translator, and say thanks to Pierre when you contact him.

[gotoluc]

Just to make sure we are all on the same page... This information isn't secret, you know.

https://www.arduino.cc/en/Main/ArduinoBoardMega2560?setlang=en

Yes TK, I know Arduino info should be available online!    I was just making sure everyone understood I made an error in my previous message to Pierre and shared his reply which I think is better to know Pierre's way of understanding the Arduino rather then quoting specs.

Luc

BTW, here is the post "quote" I read which caused the confusion. My error was to assume this information was correct which no one else corrected until I asked Pierre.
http://overunity.com/17609/170-watts-in-1600-watts-out-looped-very-impressive-build-and-video/msg517857/#msg517857

post quote: Lastly, I also looked up the Arduino 2560 and it has 54 digital I/O pins, so enough to drive 36 transistors.

PmgR