An inductive AC and DC current transformer based on frequency voltage conversion

Shuai Gao; Xiaoli Zhang; Chengdong Niu; Lin Zhao; Yin Zhang; Min Yao; Xuepeng Wei

doi:10.1117/12.2640058

23 May 2022 An inductive AC and DC current transformer based on frequency voltage conversion

Shuai Gao, Xiaoli Zhang, Chengdong Niu, Lin Zhao, Yin Zhang, Min Yao, Xuepeng Wei

Proceedings Volume 12254, International Conference on Electronic Information Technology (EIT 2022); 122540L (2022) https://doi.org/10.1117/12.2640058
Event: International Conference on Electronic Information Technology (EIT 2022), 2022, Chengdu, China

Abstract

In order to solve problem of the complex structure of electromagnetic AC&DC current comparator, in this paper a principle of AC/DC current transformer based on self-excited oscillation frequency voltage conversion is proposed, and the basic principles of magnetic flux detection of AC/DC current transformer based on self-excited oscillation is introduced. The gain and sampling circuit of the current transformer is proposed to make the output voltage more accurate. According to the principle, the circuit schematic is given, after preliminary tests, the DC current measurement error of the transformer can reach 3%, and the measurement error of AC current is not more than 7% within the range of 1000Hz.

Citation Download Citation

Shuai Gao, Xiaoli Zhang, Chengdong Niu, Lin Zhao, Yin Zhang, Min Yao, and Xuepeng Wei "An inductive AC and DC current transformer based on frequency voltage conversion", Proc. SPIE 12254, International Conference on Electronic Information Technology (EIT 2022), 122540L (23 May 2022); https://doi.org/10.1117/12.2640058

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