Successful TPU-ECD replication !

[z_p_e]

Roberto,

Perhaps if you'd like to and have time, could you measure the inductance and resistance of your warm or hot bulb as well?

This way we will have a better model. 

Cheers,
Darren

[Jdo300]

Hello All,

Here's another update for you. I took some time today to verify that my MOSFET box and harmonic circuit are working well together. After removing the capacitors in parallel with the MOSFET driver output.

With a 100 MHz scope digital scope from school, I clearly measured a rise time of 20 ns! when my driver circuit was powering a small 1:1 transformer as a load. Also, the BEMF spikes that resulted were extremely tall! I measured peak to peak voltages of 550V+! This was with  the primary pulsed with 6V @ 2A (the resistance of the transformer primary is only 0.6 Ohms). I always use the same little transformer to test all of my circuits but this time something different happened. I was actually able to cause High voltage hash to ring from the computer speakers of a PC nearby in the room, and when I connected the scope probe and ground to the secondary coil, the transmitted RF hash from the transformer shut of the computer's USB connections! Previously I had only witnessed this effect when testing my TPU so I can testify that the rise time was the significant difference in this instance!

Now that my harmonic circuit is all ready to go, I focused on preparing my ECD and TPU V7.0 which I have yet to test. My TPU (also pictured here http://www.overunity.com/index.php/topic,1872.msg31804.html#msg31804).

I am still a fan of the Tesla RE effects in the TPU. Each of my control coils are wound with 200ft of 30 gauge magnet wire with a total resistance of 22.7 Ohms. The coils are wound in bobbins intentionally to greatly increase the coil inductance. When I measured the L of one, it came out to be a whopping 2 mH! There are more details of this TPU that I will share but I'll keep it minimal here since this thread is devoted to the ECD. If I get positive results with it, I will start a new thread with details.

I will be testing it along with my ECD.

Attached is a screenshot of the open circuit pulse output of my circuit across the secondary of the test transformer. Also attached is a photo of my completed test setup. All I need to do now Is make the BNC cables to connect my control board to the MOSFET box and I'll be ready to begin testing.

God Bless,
Jason O

[ronotte]

Hi Jason,

at the end you now have my same BEMF results!...so take care of your Mosfets as they are rated only 500V!....often, on PHASE side I measured about 900V  (there will be special...conditions).  So now you understand how easy will be puncturing effect from Drain to Gate.  When this happen you will loose the fet driver also. The funny thing is that the MOSFET itself does appear apparently to work  (this is because the puncturing is microscopic and has for itself a cospicuos resistance)...but it does not  (so no Seed- no way i LOST THERE LOT OF TIME TO UNDERSTAND WHY THE DEVICE WERER NOT OPERATING!). So if you put your probe on power MOSFET's Gate you will see in correspondence of the BEMF a 50-70V spike  that in turn will led to mosfet's driver failure.

I did a movie on my test (87 MB) but I've been unable to upload it either here or trough standard e-mail. May be Stefan will suggest a way?.

Roberto

[ronotte]

@Darren,

yes it's probably a typo...sorry. For sure I'll double check it today and let you know. Of course I'll measure the bulb hot & warm resistance, please specify how you want me to measure it's capacitance: do you mean against ground?

For the Mobius I could also measure its capacitance between the two wires and against the ground...what do you suggest?

Roberto

[ronotte]

@Darren,

here are the correct values:

Prymary: 0.023 mH
Secundary: 0.22mH

Cold bulb Resistance = 59.6 Ohm
Hot bulb Resistance = 420 Ohm  (similar light emission)

regards

Roberto