Frequency analysis behavior of Hysteresis Current Control in VSI

This paper presents an analysis procedure for switching frequency in single and three-phase Voltage Sources Inverters (VSI), using Hysteresis Current Control (HCC). The instantaneous frequency profile, for synthesizing sinusoidal signals, and its behavior with several load variations, is presented. The analysis is performing with constant and proportional hysteresis bands, in single-phase VSI (with and without frequency limiters). Three-phase VSI, with independent HCC, and, Space Vector based hysteresis current controller are also shown.