This lack of static, DC offset current in the output transformer means that the core can be made smaller, because it requires no air gap to prevent core saturation from the static DC offset current.

这种缺乏静态，直流偏移电流输出变压器的核心手段，可更小，因为它不需要空气间隙，以防止核心饱和从静态直流偏移电流。

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This paper introduces the principle and characteristic of the air-core coil current transformer, designs AC-sampling and processing circuit, and introduces the process of software detail.

介绍了空心线圈电流互感器的工作原理和特点，设计了适于此种互感器的交流采样和处理电路，详细介绍了软件的处理过程。

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