An Effective Filter Design for Single-Phase Inverters

This paper deals in analysis and selection procedure of an output LC filter parameters for a single phase voltage source inverter. It is to minimize output voltage as well as current ripples without maximizing the filter size. For an LC filter, a fixed value of cut off frequency gives an infinite combination of possible L and C value. For an isolated Pulse Width Modulation (PWM) inverter, LC filter is the most efficient in suppressing the current harmonics occurring from the switching frequency and also in minimizing power loss. This work considers both current and voltage dynamics as well as inverter size to decide appropriate filter parameters. Various conditions such as no load, resistive loads and inductive loads are also considered in designing the filter.