METHOD FOR CONVERTING CONSTANT VOLTAGE INTO QUASI-SINUSOIDAL VOLTAGE WITH PULSE-WIDTH MODULATION (VERSIONS)

摘要

FIELD: electricity. ^ SUBSTANCE: method for converting constant voltage into quasi-sinusoidal voltage with pulse-width modulation can be used in frequency converter control systems. Conversion method consists in comparing sawtooth signal with positive and negative inverted half-waves of drive (sinusoidal) signal. In this process, when drive signal is crossing zero reference sawtooth signal is reset to initial state which is predetermined and lays in range from zero to maximum. ^ EFFECT: improvement of electric drive operation quality in sustained mode and transient modes due to excluding constant components from output voltage of stand-alone inverter at subfrequencies. ^ 2 cl, 5 dwg