Patent ID: 7161305
Filing Date: 2007-01-09
Classification: H05B

Abstract:
1. An apparatus for converting a direct current (DC) signal into an alternating current (AC) signal, comprising: a network of at least one switch for generating an AC signal from a DC signal, the AC signal being generated by a first portion of the network periodically opening and closing; filtering means being coupled between the network of the said at least one switch and the load, the filtering means filtering the AC signal delivered to the load, wherein the filtering means includes a transformer having at least one primary winding that receives the AC signal from the network of the said at least one switch and having a secondary winding that is coupled to the load, and wherein a diode is in series with the at least one primary winding of the transformer; and impedance means coupled to said at least one transformer primary winding to form a resonant circuit for periodically opening and closing the switch, generally at a resonant frequency of the filtering means, so that alternating electrical power is supplied to the load under a range of voltages provided by the DC signal.