Performance characterization of a new discrete pulse-modulated current regulator

Abstract

A novel discrete pulse-modulated current regulator, which controls a space vector that describes the load current, is introduced. This controller uses no additional state feedback and results in better performance than the current regulated delta modulator (CR Delta M). The proposed adjacent state discrete time current regulator, which switches between adjacent switching vectors and the zero state on the basis of the state chosen by the CR Delta M scheme, contains most of the operating characteristics of a cost function regulator, which utilizes full state feedback. Simulation results of this new regulator are compared to the CR Delta M and the cost function discrete time current regulator. The same ideas used in the discrete pulse case can be extended to form a new hard-switched hysteresis-type current regulator. In either case, the regulator is easily implemented, requiring no calculation of counter-EMF (electromotive force) or Delta I. In addition, a modified sigma/delta modulated voltage regulator that satisfies the pulse polarity consistency rule is derived. Finally, complete experimental results are given.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>