Patent ID: 6885567
Filing Date: 2005-04-26
Classification: H01J,H02M

Abstract:
1. A power supply circuit for supplying alternating power to a load, comprising: a source of direct current (DC) voltage; a single ended inverter, the single ended inverter receiving the DC input voltage and generating an alternating current (AC) output signal; a first harmonic filter at the output of the inverter, the first harmonic filter filtering out predetermined harmonic components of the AC signal to generate a filtered AC signal; and an output circuit at the output of the first harmonic filter for receiving the filtered AC signal and feeding the filtered AC signal to a load, wherein the output circuit includes a rectifier connected relative to a point in the output circuit such that if the voltage at the point exceeds a predetermined threshold, the rectifier conducts to cause at least one of voltage and current to return to the source of DC voltage and clamps the point to a predetermined voltage.