POWER SOURCE INVERTER FOR USE WITH A PHOTOVOLTAIC SOLAR PANEL

摘要

An improved topology is presented for a single phase power source inverter that is designed to minimize double frequency ripple. The inverter circuit includes: a capacitor coupled in parallel across a direct current (DC) voltage source; a bridge circuit having three legs electrically connected in parallel with the voltage source and each other, such that each leg of the bridge circuit being comprised of two switches coupled in series with each other; a low pass filter electrically connected between the bridge circuit and a load; an auxiliary inductor having a first terminal electrically connected to one leg of the bridge circuit and a second terminal electrically connected to another leg of the bridge circuit and the load; and a controller that drives the switches of the bridge circuit in a manner that maintains instantaneous power transfer across the bridge circuit constant.

主权项

1. An inverter circuit, comprising:
a capacitor coupled in parallel across a power source; a bridge circuit having three legs electrically connected in parallel with the voltage source and each other, each leg of the bridge circuit being comprised of an upper switch coupled in series with a lower switch; a low pass filter electrically connected between an output of the bridge circuit and a load; an auxiliary inductor having a first terminal electrically connected to one leg of the bridge circuit and a second terminal electrically connected to electrical ground; and a controller electrically coupled to the switches of the bridge circuit and operable to drive the switches of the bridge circuit in a manner that maintains instantaneous power transfer across the bridge circuit constant.