Line current filter for less than 10% total harmonic distortion

摘要

A line current filter for less than 10% total harmonic distortion includes an isolation transformer having two mutually coupled coils connected to an AC power source and a voltage rectifier. A shunt circuit is connected in parallel to one of the mutually coupled coils. The shunt circuit is comprised of a series connected resistor and capacitor. The shunt circuit may also include a second resistor connected in parallel to the capacitor. A second capacitor is connected across the two mutually coupled coils between the isolation transformer and the DC rectifier.