engleski

Influence of the axial inclination of primary conductor on mutual inductance of a precise Rogowski coil

In order to use Rogowski coil for the high-accuracy measurement of AC current (up to 20 A at power supply frequency, with the aiming uncertainty of 100 parts per million) all influencing quantities and their contribution should be recognized and analyzed. The same theoretical basis can be applied if the use of such transducer is planned for much higher currents and frequencies. Therefore, in this paper the analysis of the partial influence due to the angle of the primary conductor relatively to the secondary coil, with the nonhomogeneous density of secondary turns, is analyzed. The measured deviation of the mutual inductance showed agreement with the results of theoretical consideration, which shows that the careful construction of this sensor can provide the required accuracy.

AC current measurement ; mutual inductance ; precise Rogowski coil ; theorethical analysis

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