Modelling and analysis of six-leg interleaved boost converter for fuel cell HEV applications

This paper proposed a six-leg interleaved boost converter (SLIBC) in an integrated multi-level converter (IMLC) of switched reluctance motor (SRM) drives for the fuel cell hybrid electric vehicle applications (FCHEV). The fuel cell with the combination of supercapacitors acts as a source in order to observe the speed-torque characteristics of SRM drive. The IMLC is operated with switching positions of the front-end circuit to obtain the different multi-level voltages. The current controlling scheme is employed for speed control of the SRM drive. In the fuel cell driving mode, a supercapacitor is used to provide the phase voltage for quick demagnetisation and excitation. Furthermore, IMLC acts as a 4-level converter for producing multi-level output voltages. The proposed topology has output voltage and current of 875 V and 8.75 A respectively and the speed-torque characteristics are observed as 4,200 rad/s and 32 N-m compared to the operation with conventional FLIBC and Modified FLIBC topologies. The effectiveness of the system is validated through MATLAB/Simulink software.