Abstract
A method is for controlling a three-phase current converter. First, subtract a second reference current signal representing the predict current of the three-phase terminals in the next switching cycle from a first reference current signal representing the predict current of the three-phase terminals in the present switching cycle to obtain a predict variation. Then, subtract a feedback current signal representing the feedback current of the three-phase terminals in the previous switching cycle from the second reference current signal delayed by one switching cycle to obtain a current error. Add the predict variation to the current error multiplied by an error coefficient to obtain a current variation. Finally, obtain the duty ratio of a plurality of switches, according to the current variation and inductance of the first to the third inductor. The three-phase current converter converts electric power between a dc terminal and the three-phase terminals, according to the duty ratio.