Hello everyone. I'm currently designing a driver for a 5 HP BLDC motor that runs on 320 VDC. I've created the circuit for it using 6 power MOSFETS (I used six IRF840) and the microcontroller that will give trigger them is an Arduino Uno. Of course, since 3.3V from the Arduino is too low a voltage to trigger the gates, I also used 2N2222 behind each MOSFET to act as a switch and give out a much higher voltage to the gate of the IRF840s. Naturally, I'll be using power diodes too at the end, right before the connection to the motor so that the circuit is protected from any feedback when the power is cut off.
The problem that remains is the usage of capacitors. I realize that I'll need large 400V capacitors, and these were the ones provided for me. However, I've never used 4-Pole capacitors before and have no idea how they work. All I know is that the poles are actually connected to the corners of each plate instead of in the middle like regular 2 wire capacitors.
I have looked online and came across a couple of circuits that tell me how to wire them, but I can't simply rely on such circuits without understanding what is going on first. So can someone please explain how to connect not two but NUMEROUS 4-pole capacitors in parallel, as well as an explanation of how they exactly differ from 2-pole capacitors.
This is the diagram that I saw:
https://lh3.googleusercontent.com/proxy/UsCZpRN0z3gO2jZ7sas54NcE3fOBuuKy1XQZ3c3Jh7KcDOH11k23bCj2Q0Lpl-gcc7FmvAs4Tu_H-6Zxw8q80r3nKQiXTw