On Harmonic Properties of Carrier-Based Asynchronous Modulation Strategies for Dual-Inverter Topology

The dual-inverter topology is a key solution for high-performance motor drives, offering reliability and efficient DC-bus voltage utilization. This paper focuses on the isolated DC source configuration, known for its fault tolerance and suitability for applications like electric vehicles. Unlike common DC source setups, it eliminates the zero-sequence current path. This study explores the harmonic properties of popular carrier-based asynchronous modulation techniques (SVPWM, DPWM1, and DPWM2) in dual-inverter systems. While these techniques are well-studied in conventional inverters, their behavior in dual-inverter setups remains underexplored. The investigation includes different reference vector distributions and compares results with conventional inverters. The findings enhance our understanding of harmonic behavior in dual-inverter configurations, providing insights for optimizing motor drives and power electronics applications.