High order distribute circuit model of laminated busbars and its order reduction techniques for simulating fast turn-on and turn-off transients

Abstract

A high order distribute circuit model of a laminated busbar is proposed in order to accurately simulate the fast turn-on and turn-off transients of a modern power electronic device. In the model, the predominant stray parameters of the loop inductance and the stray capacitance are considered. Moreover, a model order reduction (MOR) technique using the zero-pole elimination technique is presented to combat the high complexity of the extremely computationally expensive circuit model. The MOR methodology is implemented in two phases. The first phase is to compute the reduced order frequency model. In the second phase, this reduced model is synthesized into a circuit model in a netlist representation (RLC elements), which can be integrated in any SPICE-like circuit solver. Finally, the proposed model and methodology are used to solve the transient performances of a prototype IGBT based inverter, showing excellent agreements with the experimental results.