A new hybrid C-dump and buck-fronted converter for switched reluctance motors

This paper presents an experimentally verified single-pulse-operation switched reluctance motor converter topology based on the basic buck-fronted topology and the modified C-dump topology. Using only (n+1) power switches, this topology is able to achieve full single-pulse operation, thereby reducing switching losses and acoustic noise. It also achieves a greater demagnetizing voltage compared to the basic buck-fronted topology, without having to increase the DC-source voltage. The converter is more robust as its dump capacitor stops being charged if the chopper switch fails. The principle of operation, modes of operation, transient simulation results, and experimental results are presented.