An investigation of operating algorithms of a five-phase converter in the vector pulse-width modulation mode

Abstract

Seven control algorithms of a five-phase converter running on a five-phase symmetrical load have been analyzed. A theoretical study of the formation of resultant rotating vector of current when implementing seven control algorithms has been carried out. The space of states of the resulting rotating vectors of a five-phase converter includes six switching sequences: three sequences of five keys, one sequence of three keys, and one sequence of two keys. Each of these switching sequences can be used to form a symmetrical five-phase voltage required for feeding a five-phase motor. The sequence of commutations that generate voltage that is symmetrical in time, but do not provide the formation of a circular rotating field using the five-phase winding, has been investigated. Experimental results confirming theoretical studies are given.