| Abstract |
To achieve a high-performance index and accurate controllability of power electronics converters (PEC), generalized small-signal analysis of the closed-loop PEC is a key aspect. This article presents a detailed generalized small-signal averaged switch model (GSSASM) of a Wide Bandgap (WBG)-based Interleaved Bidirectional Buck converter (IBBC) for electric vehicle drivetrains (EVs) to better understand the circuit characteristics, performance, stability and control. The derived GSSASM considers the power electronics device (switch & diode), the parasitic of inductor and source and equivalent series resistance of the capacitor, which results in attaining an accurate mathematical model close to real-time (RT) system. The proposed model can be utilized for any number of phases in IBBC. Furthermore, a field-programmable gate array-based (FPGA) programming board of dSPACE MicroLabBox, is used to implement a dual-loop discrete controller to formulate the proper compensators for achieving high dynamic performance in the RT prototype system. Finally, the performance of the proposed mathematical model in the transient and steady-state condition is verified with a 30-kW SiC-based IBBC laboratory prototype. |
