Five level high power motor drive converter and control system

摘要: A high power motor drive converter includes: a five level hybrid NPC output conversion stage including three phase bridges having switches and coupled in wye configuration through neutral point, each bridge receiving on respective direct current bus; isolated split series-connected DC capacitor banks parallel to one of the bridges; controller for selecting switch positions with active control voltages. The is adapted select using feedforward sine-triangle modulation third harmonic injection, zero sequence and/or discontinuous injection.