Longitudinal Wave Experiment to demonstrate Overunity

[d3x0r]

Rewatched original demonstrationhttp://youtu.be/6BnCUBKgnnc?t=20m0s  (describe element)


'radio frequency inductors of 10 millihenries and some (...) pulse capacitors of 0.47 microfarad'
so resonant frequency of that is 2321Hz
Inductive/capacitive reactance is 145Ohm


so these 9.2nF caps I have, have a capacitive reactance of 145 ohms at 118Khz so I should make inductors that are 197.74 MicroHenrys


My original reactances would have been like 550 ohms; maybe the target condition should be low reactance....

[itsu]

Is there a way to measure ESR of a capacitor?
It appears that these high voltage ceramic caps I have are low ESR


I ordered them from http://hvstuff.com/high-voltage-capacitors/ceramic/disc
Dissipation Factor   ≤0.01

found a quote somewhere... "(Ceramics have lower ESR than tantalum or aluminum electrolytics.)"
so... should be good, right?

Hi d3x0r,

any decent LCR meter is able to measure the ESR of a capacitor which is depending on the frequency used.

See this short video of measuring the ESR of a similar HV ceramic capacitor (9nF/3KV) like yours:

https://www.youtube.com/watch?v=vaixmCew7Sw&feature=youtu.be

Regards Itsu

[gyulasun]

Is there a way to measure ESR of a capacitor?
It appears that these high voltage ceramic caps I have are low ESR


I ordered them from http://hvstuff.com/high-voltage-capacitors/ceramic/disc
Dissipation Factor   ≤0.01

found a quote somewhere... "(Ceramics have lower ESR than tantalum or aluminum electrolytics.)"
so... should be good, right?

Hi,

ESR meters are in fact "AC driven" Ohm meters,  AC here means a single frequency out of  10 kHz or 50 kHz or 100 kHz oscillators which drives a bridge to wich the capacitor to be measured is connected.  There are off the shelf ESR meters or you can build such like shown here:   http://kakopa.com/ESR_meter/    or google for other circuit solutions.

Re on your dissipation factor:  it sounds a moderate dissipation factor to me, its reciprocal gives the Q quality factor which means the Q is higher than 100.   You would expect over 1000 or even higher for a capacitor but of course for such a high voltage type it costs much more.

Gyula

EDIT just noticed itsu post: the 1.99 OHM ESR at 100 kHz sounds indeed high to me...

[d3x0r]

@itsu
  Thank you very much.

@any
Does capacitance change ESR or is it more of a material attribute?
I should get a decent LC meter... mine's literally L and C.

[gyulasun]

In Itsu's video at 0:33 you can see D= 0.005 value.  This is the Dissipation factor and taking its reciprocal you get a Q=200 for this capacitor at 100 kHz.

Yes, ESR is frequency dependent.