Design and Performance of Miniature Rogowski Coil for Heavy Current Measurement

A kind of miniature Rogowski coil which measures high frequency and heavy current is introduced,and the principle of work of Rogowski coil is analyzed.The influence of non-uniform laying of the miniature Rogowski coil,including the biased laying and the inclined laying on the electric current survey performance is discussed.In order to reduce the influence of the coil laying on the capriciousness,the coil may be wound thread or increased evenly from the integral coefficient.The Rogowski coil of the hollow multi-layer circles reduces the coil stray capacity in the manufacture process.The design project of coil is proposed,the current waveform is tested by using many kinds of structures of the coil,and the massive test data are obtained.Through comparing the overseas standard electric current test and head test data of the probe,the current coil design is improved unceasingly.The test using magnetic material can enhance the coil actually from the integral criterion function,but the used magnetic material should have saturation induction density and consider its working band.