Extraction of DC busbar parasitics in PWM inverters

Abstract

Purpose

The purpose of this paper is to present and apply a parasitic extraction approach for the calculation of DC busbar inductances.

Design/methodology/approach

A computational approach based on the finite integration technique and computed magnetic energy is developed to extract parasitic inductances. The finite integration analysis is conducted via the magnetoquasistatic solver of CST EM Studio^® capturing the 3D geometrical effects of the design, as well as the skin and proximity effects.

Findings

The method is applied successfully to evaluate the leakage inductances of two printed circuit boards structures; a backplane sample for the verification purpose and a real DC bus employed in a three‐phase pulse width modulation inverter.

Research limitations/implications

The paper demonstrates that the method calculates the loop inductances accurately. It does not, however, verify the used technique to split loop inductances into partial inductances.

Practical implications

The extraction method is easy‐to‐use and able to handle complex geometries within acceptable computation time and accuracy.

Originality/value

The paper introduces a way to compute the parasitic inductances from the results of a numerical electromagnetic field solver.

Citation

Çay, Z., Henze, O. and Weiland, T. (2009), "Extraction of DC busbar parasitics in PWM inverters", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 28 No. 4, pp. 1033-1043. https://doi.org/10.1108/03321640910959080