open-source-energy.org

This thread will be open closer to the end of the contest.

« Reply #1, on December 28th, 2020, 06:20 AM »

This Thread is officially Open for your Final 3 min Entry videos to be posted.

Remember to only link your video here. You can not upload the video to the forums.

Good Luck!

~Russ

Here is my advanced class entry, much more info in the video description, good luck everyone, thanks for watching.
And thanks to Russ, the admin's and the gang for putting on this years PMBO competition.

Quick Summery, now working:
New FET driver (2ED2108S06F) in all three drive modes.
Better FET (STW80NE06-10, 80A, 60V, 8.5milliOhm, TO-247 package) has not failed yet.(option IRFP064N)
New more sensitive hall effect trigger sensor (A1104)
Hall effect coil current sensor (ACS758ECB-200B-PSF-T, 10mV/A)
Configuration: enable/disable each fet, combination of fets and their drive polarity though switches and jumpers with indicators.
indicator of coil current on hall trigger sensor (warns if coil current is on continuously from ball not rotating) and overheating the coil.

And the largest achievement:
Single low side drive, push/pull drive (with coil tied to Vcc/2), and full bi-directional H-Bridge fet drive.
This really opens the next level of testing for my project.

As a side bonus, it does solve the coil flyback voltage issue causing fet avalanche and blown fets. The highest drain voltage I have seen was around +/-20V in this mode. The fact that 99% of fet's have a body diode, and with the H-brige config, there is 4 ways the flyback voltage/current has a path to travel (called free wheeling mode).

https://youtu.be/K6xhW22r6xQ

« Reply #3, on December 31st, 2020, 09:42 AM »

Here is my advanced class entry.
Good luck for everybody!

https://youtu.be/nJ1TMoSA0_Y

« Reply #4, on December 31st, 2020, 11:42 PM »

I had lots of technical difficulties getting the videos together. And man, didn't realize how hard 3 min would be to try and get everything all in at the end, lol.
I did this all in one take in order to get up here by the clock run out. My "half way video" should shortly follow. It will at least be on my youtube page if I fall asleep before it finishes uploading, lol.
This RPS I built has a lot louder snap in person than the camera mic allows through. Even though I couldn't get my pulse motor running by end of the contest, I am pretty proud of the power supply I get to share with you all.

https://youtu.be/kn1iM8U3oko

« Reply #5, on January 1st, 2021, 06:12 PM »

the motor coils are being pulsed at under 1kv, the rotor is all north poles out and the coils are attracting being south, i haven't done much positioning of coils since i beefed up the capacitor bank.