A Resonant Approach to Transformer Loss Characterization
A Resonant Approach to Transformer Loss Characterization
复制标题
DOI：
10.1109/apec43599.2022.9773516
复制
发表时间：
2022-03
期刊：
影响因子：
--
通讯作者：
M. Solomentsev;Odinaka Okeke;Alex J. Hanson
中科院分区：
文献类型：
--
作者：
M. Solomentsev;Odinaka Okeke;Alex J. Hanson
虽然变压器的电感矩阵相对于驱动和频率（直到自谐振）是相当恒定的，并且可以使用网络分析仪进行测量，但其损耗是频率的非线性函数，因此难以表征，特别是在MHz及以上频率下。本文提出了一种谐振方法来测量变压器的损耗，包括两个绕组在特定工作点的耦合效应。我们进一步表明，在可接受的误差范围内，结果可以外推到不同的工作点。通过对几台变压器的性能表征，通过手工计算、有限元分析仿真和量热测量验证了该方法的有效性。这项工作能够准确和全面地表征高频状态下的变压器损耗。
While a transformer's inductance matrix is reason-ably constant with respect to drive and frequency (up until self-resonance) and can be measured using a network analyzer, its losses are nonlinear functions of frequency and therefore difficult to characterize, especially at MHz frequencies and above. This paper presents a resonant approach to measuring a transformer's losses, including the coupled effects of both windings, at a specific operating point. We further show that, to an acceptable error, the results can be extrapolated to different operating points. The method is experimentally validated by the characterization of several transformers whose losses are confirmed by hand calculation, finite element analysis simulation, and calorimetric measurement. This work enables accurate and full characterization of transformer losses in the high frequency regime.