Desired Current pattern generation using Adaptive Voltage Sources in ACT4

This paper focuses on an approach involving application of multiple current patterns using multiple voltage sources in ACT4 system. Application of multiple current patterns is known to suppress the high spatial frequency noise over the application of voltage patterns. Since current sources are difficult and expensive to build, several algorithms were developed in order to apply multiple current patterns using voltage sources. One such iterative algorithm developed by Choi et al was incorporated in ACT4’s user interface so that the necessary voltage patterns are generated that result in the application of the desired current patterns. Results are presented from the experimental studies performed using different loads. These experimental results are used to illustrate the convergence of the output current with the desired current.