Fault-Tolerant Reconfigured FBSRC Topologies for Induction Furnace with PI Controller

Present work describes a full bridge series resonant converter (FBSRC) for a 150 KW induction furnace. Resonant converter topologies are pretty common from few years in transmission of high-power applications: “pulse power supplies” and “particle accelerators”. The proposed converter topology is popular mainly in “applications of solid-state transformers” where fault tolerance is very much desired feature which is achieved from its redundancy without compromising efficiency of the system. This work explores full bridge SRC (FBSRC) used for transfer of “high voltage and power applications” with PI controller. It is also proposed to improve the fault tolerance of current converter by reconfiguration of the network during fault, which may negotiate the performance of the same but will prevent from halting. The FBSRC under open circuit fault is reconfigured in to half bridge SRC (HBSRC). The proposed work is implemented in MATLAB/SIMULINK environment. Various configurations are proposed with PI controllers for 150 KW induction furnace when FBSRC is experiencing open-circuit fault. Also, the switching losses with and without resonant converter are addressed.