C75, C43, C53,C87,C52
1. Widely used in DC-LINK circuit for filtering energy storage.
2. Can replace electrolytic capacitors, better performance and longer life
3. Wind power, photovoltaic power inverter

Capacitor mainly acts as the rectifier filter in the Inverter circuit.

Power input using three-phase AC through the bridge rectifier output the DC pulse. In this part we can use C43/C45 that can better withstand the high pulse current and resistance high voltage.

In the circuit, using the IGBT snubber capacitor (C51/C54) can do a good buffer absorbing. After the IGBT the output voltage in secondary reduction voltage it needs a coupling blocking capacitor (C74/C75) to rectifier filter and output. That realizes the whole inversion process from low frequency to high frequency.