Design and Modeling of Low-Inductive Busbars for a Three-Level ANPC Inverter


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Abstract


Laminated busbars are extensively used to connect components in hard-switched power inverters due to their low stray inductance. The objective of this paper is to demonstrate the design procedure and modeling of laminated busbars of a three-level three-phase Active Neutral Point Clamped (ANPC) inverter, with special emphasis placed on ensuring low stray inductance at an early design stage. In the paper, the partial inductances of the busbars are estimated using an ANSYS Q3D software tool. The stray inductance of the commutation loops is determined analytically and by cosimulation with ANSYS Simplorer and Q3D. Cosimulation allows analysis of the influence of the stray inductance on the performance of the inverter. The modeling results show that the laminated busbars proposed in this paper have low stray inductance. The stray inductances of the commutation loops were measured before the inverter is assembled to verify the modeling results. The approach used reduces the need for late-stage modifications based on prototype testing
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Keywords


Busbars; Converters; Impedance Measurement; Inductance

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References


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