Algorithms of synchronous vector modulation for hybrid multi-converter six-phase system

Abstract

Topology of dual three-phase (six-phase) adjustable speed motor drives can be based on two standard inverters and two neutral-point-clamped converters. Control of these systems in accordance with specialized schemes and techniques of synchronized pulsewidth modulation (PWM) allows providing elimination of the common-mode voltage and continuous symmetry of the output voltage waveforms during entire control region for any operating conditions. MATLAB-simulations illustrate behavior of hybrid multiinverter drive system with basic versions of synchronized PWM.