Development of an integrated high voltage 3-level converter-inverter system with sinusoidal input-output for feeding 3-phase induction motors

摘要

The authors describe an integrated high voltage 3-level converter-inverter system. The system is characterized by a capacitor DC link voltage and a current controller based on space vector modulation (SVM). Current drawn from the supply as well as current supplied by the inverter are sinusoidal with reduced harmonics. Through the current controller at the converter side, the system is forced to operate at unity power factor while the DC link voltage is observed dynamically and kept constant. Moreover the modulation at the inverter side is implemented using a single-chip 16-bit microcontroller (80196).