Review of current regulation techniques for three-phase PWM inverters

This paper presents a review of recently used current regulation techniques for voltage source pulse width modulated (VS-PWM) inverters. A variety of techniques, different in concept, are described as follows: on-off hysteresis free running and fixed frequency regulators (phase independent, look-up table based, space vector based); linear regulators (carrier based, working in stationary and rotating coordinates, PI and state feedback); predictive (minimum and constant switching frequency); and dead beat regulators. Also, recent trends in the current regulation-neural networks and fuzzy logic based regulators-are presented. Some oscillograms which illustrate the properties of the presented regulator groups are shown