VALVE INVERTER Russian patent published in 2004 - IPC

FIELD: electrical engineering; inverters and computerized dc and ac drives. SUBSTANCE: valve inverter has power valve unit whose output is connected to load and control circuits of valves, to control device whose respective inputs are connected to regulation unit and to protective gear units; ac transformers installed in inverter phases with common-point resistors connected to their secondary windings; m-phase device for inverter output current module separation that incorporates single-phase precision rectifiers built around operational amplifiers; and adder. Inputs of rectifiers are connected to respective resistors and to their common point and outputs, to adder inputs; output of the latter is connected to respective inputs of regulation and protective gear units. EFFECT: simplified design, enhanced reliability, measurement accuracy, and precision of regulation. 2 cl, 4 dwg