Output LC Filter Design for the PWM Inverters

Inverters are widely used in almost every aspect of life. These devices are implemented on pulse width modulation with a significant frequency to produce the desired voltage form. Inverters are used in power converters, such as variable speed drive systems, Dynamic Voltage Restorers (DVRs) or UPSs, etc. The LC filter is an essential component in inverters. It helps that the output voltage remains the desired fundamental element and eliminates the converter's high-order harmonic feature. This research proposes a method to estimate the current through the capacitor of an LC filter from which it can be accurately determined to control.