Output and power performances of twelve-phase compensated rectifiers with vectorial control

Abstract

A circuitry of twelve-phase compensated rectifier with vectorial control is presented. The circuitry includes compensating device that filters in commutating capacitors both odd-multiple and even-multiple harmonics of rectifier assembliy input currents in certain ratio (combined compensating device). Quasi-steady state electromagnetic processes of the rectifier in basic mode were studied using high-power converter assumptions. The study was performed by means of numerical analytic method. The theory of steady-state electromagnetic processes of compensated rectifier was generalized for the case of twelve-phase rectifier with vectorial control. Output and power performances of the rectifier were determined. The paper presents conclusions about possible decrease of compensating device total capacity at combined usage, and output current range expansion for basic mode in comparison with network frequency compensating devices.