A Method for Temperature Error Correction of Transfer Impedance of EMC Current Probe

doi:10.3969/j.issn.1000-1093.2016.04.020

Abstract

Abstract: In order to improve the measuring accuracy of current probe influenced by ambient temperature in field EMC (electromagnetic compatibility) test, the mechanism of temperature affecting on the transfer impedance of current probe is analyzed, and the quantitative relations among winding resistance, distributed resistance, distributed capacitance and temperature are given. A calibration method of current probe is presented based on the temperature error compensation, the law that transfer impedance changes with temperature and the curve of temperature error compensation are given, the validity and effectiveness of the proposed method is proved by comparing the test results with the laboratory results. The results show that the method can be used to expand service ambient temperature of the current probe from -40 ℃ to 50 ℃ on the premise of ensuring measuring accuracy, and reduce the measurement error in field test.

Key words: ordnance science and technology, electromagnetic compatibility, current probe, transfer impedance, temperature, correction, calibration

CLC Number:

TM930.1

HE Yang， GAO Wan-feng， ZHANG Jian-wei， ZHANG Chun-xi， LI Yan. A Method for Temperature Error Correction of Transfer Impedance of EMC Current Probe[J]. Acta Armamentarii, 2016, 37(4): 712-718.

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