Abstract:
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Inductive voltage dividers (IVDs) are one of the important equipment in the field of alternating current (AC) measurements. IVDs are used as a voltage ratio standard and as a component of impedance bridges. In particular, if an IVD is used for an impedance-to -voltage conversion circuit, it should have a high input impedance. On the other hand, a commercially available IVD can maintain a high input impedance only at the resonance frequency. Therefore, if an IVD with a high input impedance is required over a wide range of frequencies, we will have to prepare several IVDs. In this paper, new winding method for special IVD is presented. As a result, the developed IVD maintains a high input impedance at frequencies up to 10 kHz using only one IVD. Furthermore, the voltage ratio errors of this IVD are within 1 ppm of input for in-phase and within 5 ppm of input for quadrature at frequencies from 50 Hz to 1 kHz. In this paper, the details of new winding method for maintaining a high input impedance and its performance are described.
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