Author(s): Bingqi Ouyang

Doi: 10.7508/aiem.03.2024.241.244

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

In this paper, a novel measurement method of multiphase coupled inductor parameters under high-current DC bias is proposed. The method deduces the measurement theory of coupled inductors, and based on the traditional voltage-current method, a measurement scheme is designed for the self-inductance and mutualinductance parameters of each phase of the coupled inductor. The inductance values at the measurement points are obtained by designing the combination of the application points of multiple measurement circuits and the application points of DC current bias circuits, and then the self-inductance and mutual-inductance parameters of the coupled inductors under large DC bias are obtained by combining the deduced relationship equations of the inductance values and self-inductance and mutual-inductance at the measurement points. The proposed measurement method is accurate and reliable, without complex protection circuits, and with low cost and risk. It has theoretical significance and practical value for the design of magnetic components for high-power power electronic circuits.

KEYWORDS:
Coupled inductors; high-power power electronic circuits; magnetic component measurement; DC bias