Patent ID: 6114814
Filing Date: 2000-09-05
Classification: H05B

Abstract:
Apparatus for efficiently converting a direct current (DC) signal into an alternating current (AC) signal for driving a load, comprising:(a) a network of a plurality of switches for venerating an AC signal from a DC signal coupled to the network of the plurality of switches, the AC signal being generated by a portion of the network of the plurality of switches periodically opening and closing opposite to the periodic opening and closing of another portion of the network of the plurality of switches;(b) a tank circuit being coupled between the network of the plurality of switches and the load, the tank circuit filtering the AC signal delivered to the load; and(c) a controller for periodically opening and closing portions of the network of the plurality of switches based on a resonant frequency of the tank circuit, so that the optimal amount of electrical power is provided for driving the load under a range of voltages provided by the DC signal, wherein the controller implements logical instructions, comprising:determining if an under voltage condition is at the load; and if true causing the AC signal to not drive the load.