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
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