I have designed a dc-ac inverter. Input is 300V Dc and required output is 240V AC (RMS). I have used PWM with switching frequency of 20kHz. My output frrequency is 50Hz. I need help with the filter design. I want to use 1000Hz as my cut off frequency. But i am not being able to get the correct values for the inductor and capacitor as I am a beginner. I would appreciate your help.