An Enhanced Unified Space Vector Modulation Technique for Dual Converters with Isolated Voltage Supplies

Abstract

This paper presents an enhanced modulation technique for dual converters with isolated supplies. This unified modulation technique is applicable for any positive voltage ratio between the isolated supplies. The modulation technique enhances the quality of converter output voltage. The effectiveness of the proposed technique is validated and results are presented for an open-end winding induction motor to demonstrate the advantages.

Technical Review of Dual Inverter Topologies for More Electric Aircraft Applications

“…A varied voltage ratio was investigated in [16], which can enhance the DC-link voltage utilization by up to 60%. All the FC regulation methods in [16], [40]- [42], [90], [94] apply the decoupled modulation strategy that separately allocates the reference voltages for two inverters, but this strategy causes undesired voltage steps at the inverter output resulting in distortions [24], [95]. In this case, the DC-link voltage utilization of dual inverters can be increased, but their output quality is significantly compromised.…”