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This paper presents input-series–output-parallel (ISOP) configuration for single-phase front-end buck rectifiers (BRs). The configuration is especially suitable for traction applications, where the complete rectification system needs to withstand high ac voltages and supply medium-power loads. The primary rectification module of the proposed configuration is based on pulsewidth-modulated BR (current...
Traditionally, in ac-supplied traction systems the available catenary voltage, 25 kV/50 Hz; 16 kV/16.7 Hz is stepped down by a line-frequency transformer, before the final rectification stage. This results in large volume and weight, as well as poor efficiency and lack of redundancy in the system. To obviate this transformer, some medium rated converters are connected in input series and output parallel...
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