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Solid state transformer topologies (SST) have gained great attention because of having features such as reactive power compensation, output voltage regulation and smart grid operation etc. Among SST topologies, three-stage topologies have been mainly focused because there are many appropriate topologies for each conversion stages. However, conventional three-stage topologies may bring complex closed...
This paper presents a transformerless solution for front-end rectification, which is particularly suitable for traction applications, requiring high voltages to be stepped down to appropriate dc voltage. The proposed topology is based on pulsewidth-modulation buck rectifier (current source inverter topology) and is capable of rectification and stepping down of single-phase ac supply, in a single stage...
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