Improvement of the cancellation performance of the loop-current array shielding module

Abstract

Cancellation performance of a loop-current array shielding module depends on the overcompensation method used to adjust current in the loops. In previous experiments we used a single value as an overcompensation factor to all of the loops in the array. In this paper a new method of the overcompensation is proposed and verified numerically. In this method overcompensation factors are calculated independently for each of the loop-current. Simulation results show almost two times improvement in the attenuation ratio and 6-8 times expanding of the best cancellation area by the new method. An example of the implementation of the proposed overcompensation method is described in the paper.