METHOD OF CONVERTING DC VOLTAGE INTO QUASI-SINUSOIDAL VOLTAGE WITH PULSE-WIDTH MODULATION (VERSIONS)

摘要

FIELD: electricity.;SUBSTANCE: proposed method of converting dc voltage into quasi-sinusoidal voltage with pulse-width modulation can be used in control systems of frequency converters. The conversion method involves matching the positive half-wave of the drive (sinusoidal) signal with the base saw-tooth signal, and the negative half-wave with the signal of the saw-toothed voltage, which is generated by shifting the base saw-toothed signal in time by a value, calculated in each cycle of the drive signal.;EFFECT: increased quality of operation of an electric drive in steady state and transient conditions due to elimination of dc components in the output voltage of the autonomous inverter at subfrequencies.;4 cl, 7 dwg