Patent ID: 6175166
Filing Date: 2001-01-16
Classification: H02J

Abstract:
A system for mitigating disturbances and interruptions in unregulated, disturbance-prone electrical input power for energizing a load coupled to an output terminal, comprising:(a) a plurality of back-up energy modules, each back-up energy module comprising a DC energy source operatively coupled to a charging circuit and a DC-AC inverter;(b) a first electronically controllable switch for conducting current from an input terminal to the load coupled to the output terminal;(c) a second electronically controllable switch operatively coupled to the back-up energy module for conducting current from the back-up energy module to the load; and(d) a system control module operatively coupled to the first and second switches and to the back-up energy module, wherein the system control module controls the operation of the first and second switches and the back-up energy module, whereby current is deliverable from the input terminal to the load during normal operations and from the back-up energy module to the load during an occurrence of an interruption or disturbance of a short duration in the unregulated input power;wherein the first electronically controllable switch comprises a normally open switching device and a normally closed switching device (S2A) coupled in parallel to the normally open switching device.