为了计算印制版空芯变压器的自感和互感，提出一个以纽曼公式为基础的新的计算方法，并给出了测试方法和测试电路。
To calculate self and mutual inductance of coreless transformer in printed circuit board, The author offered a new method to calculate based on Neumann equation as well as testing process and circuit.
因而用自感电动势、互感电动势建立微分方程的方法既可以讨论含铁芯变压器，亦可用于对空芯变压器的探讨，因此是一个最基本的分析方法。
The consistent results indicate that the former method can be used to study not only iron-core transformer, but also non-core transformer, and therefore, is a basic analytical method.
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