A CSI-Based Medium Voltage Multi-Motor Drive

摘要

A Current Source Inverter (CSI) based multi-induction motor drive is presented. An active damping control is incorporated into the constant V/f control for drive stability improvement and LC resonance suppression. The dynamic performance of the dc link is improved by an inverter side dc voltage feedforward control. A new space vector switching pattern is developed such that the proposed control scheme can be implemented with a low switching frequency (500Hz), which makes the proposed drive suitable for medium voltage and high power applications. The experimental results based on a 20kVA GTO prototyping drive using a TMS320C31 DSP controller are included.