Optimization of the internal admittance load of an inductive voltage divider for low ratio error

摘要

The distributed capacitances between the strands of an inductive voltage divider degrade the voltage ratio. A calculation scheme to convert the distributed capacitances into equivalent concentrated capacitances at the taps is given. An optimized connection scheme for the strands is calculated to produce concentrated capacitances which are as equal and as small as possible. Capacitors are added at the taps for optimum equalization. The relative error of the output voltage for a 120-V:10-V divider has been reduced to less than 1*10/sup -7/ in phase and less than 1 mu rad in quadrature, at a frequency of 50 Hz.