CONTROL METHOD FOR SINGLE-PHASE BRIDGE AUTONOMOUS VOLTAGE INVERTER

摘要

FIELD: electrical engineering.;SUBSTANCE: invention relates to the field of electrical engineering and can be used to control single-phase bridge autonomous voltage inverters (AVI). The subject of the invention is a method for controlling a single-phase bridge autonomous voltage inverter containing two parallel-connected branches connected to a constant voltage source, each of which consists of two series-connected controlled switches, while the output voltage of a single-phase bridge autonomous voltage inverter is determined by the potential difference at the connection points of the controlled of the keys of each branch, and the change in potentials is carried out using the control of the controlled keys, while the control pulses for the controlled keys of the first branch are formed by comparing the first low-frequency baseband signal and the high-frequency sawtooth signal, and the control pulses for the controlled keys of the second branch are formed by comparing the second low-frequency baseband signal limited by the amplitude of the high-frequency sawtooth signal, and the high-frequency sawtooth signal, while the shape of the first low-frequency module signal is defined as the sum of the shapes of the second low-frequency modulating signal and the low-frequency signal, which sets the law of change in the output voltage and is limited by the amplitude of the high-frequency sawtooth signal.;EFFECT: technical result, which the proposed technical solution is aimed at, is to increase the reliability of the single-phase bridge AVI by reducing the operating temperature of the controlled keys, to reduce the weight and size indicators of the single-phase bridge AVI and its economic indicators by reducing the weight and size parameters of the cooler.;1 cl, 2 dwg