I read the text, "Four of 30 kVAR 100Arms 0.47uF capacitor with the total capacitance of 1.88uF."
I do not know what kind of capacitor can you imagine 30 kVAR 100Arms?
30 kilo volt-ampere reactive
100 Amper Root Mean Square
but i do not know what kind of capacitor to look for :grin:
The specification looks inconsistent. 30 kVAr and 0.47 µF means either high voltage of about 15 kV for 50 Hz operation, then the current is wrong. Or very high frequency.
110 kHz, I see. It's unusual to specify high frequency capacitors by kVAr value, saying 110 kHz 300 Vrms respectively 100 Arms would be clearer.
The capacitor block can be possibly made by paralleling many PP foil capacitors, passing more than 10 Arms through a single capacitor is unrealistic. Or look out for special designed high frequency power capacitors, but you hardly get it off the shelf.
There are in fact loads of very high power (VAr) capable capacitors for power electronics out there - up to 5kV, at 100's of amps, for even the best dielectrics there is a V vs F curve such that as you raise the freq the applied volts must fall ( and not just due to the increase in current thru the cap ) but for the heating effects in the dielectric as the freq goes up ....
Do you remember a capacitor series with roughly the said specification (300 Vrms, 100 Arms, 110 kHz, 0.47 µF)? I know that I can get it custom made, but any off-the-shelf product?
No, excuse me. I don't want to build the circuit and presume the OP can do the search on his own, just want to ask if you you know a capacitor series that covers the range.
It's so familiar to me, so I was interested in the use of 30 kVAR, 400V, 100Arms, 0.47 μF capacitors.
Paper is supposed to bear it all, but this is dissertation work for Doctoc philosophy of engeneerinh , with many citation on ieeexplore.ieee.org.
Let's look at it differently
I need resonant capacitor 1 to 2.2uF (3uF) 200A
3. many capacitor as it's inexpensive, but I can not guess what current can bear 1pcs of such a capacitor. I do not know what the parasitic properties will be the resultant battery (parasitic induktance etc)
I believe the thread is moving towards "useless" if you don't manage to get actual datasheets for the mentioned capacitors. Agree with Easy peasy's comments in post #6 and #10.
Also need to consider the overall circuit layout. A "brick" or axial capacitor can be possibly wired with low inductance - if the current loopback is designed suitable.
you might be able to parallel 10 of these for 100A