Abstract
Multilevel voltage-source converter topologies are widely used today in high-power applications such as medium-voltage drives. On the other hand, studies on matrix converters (MCs) have been mainly limited to the low power range. With the intention to combine benefits from both multilevel structure and direct power conversion, this paper investigates the topologies and operating principles of multimodular MCs (MMMCs). Composed of three-phase-to-single-phase MC (3 × 2 MC) modules, two versions of MMMCs are presented and studied. Modulation schemes to synthesize sinusoidal waveforms on both input and output sides of the converters are elaborated. Having features such as modular design, relatively low switching frequency, and capability of using low-voltage power semiconductor devices, the presented MMMCs are intended for possible use in higher power applications where four-quadrant operation and fast dynamic response are expected. Simulation and experimental results are provided to verify the validity of the study.
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