3- PWM Pulse-width modulation control method and device for achieving constant DC-side currents in three-level converter

摘要

The present invention relates to a pulse-width modulation (PWM) control method for making direct current side current of a three-level converter constant which can control so that DC side current becomes constant on average for every switching cycle in a three-level converter which converts alternating current into direct current or direct current into alternating current, and a device thereof. To this end, the PWM control device comprises: a modulation function generator; a d_0 generator; a duty ratio generator; and a gating signal generator.