The modelling of active rectifier circuits which have unit factor for the feeding of nonlinear loads

In the circuits (inverters) which provides dc-ac transformation, because of the diode-capacitor structure used in the input stage, the current which drawned from the grid can not be sinusoidal. In this study; it is designed GFD circuit at the input of inverter in order to bring the same shape the current and voltage drawed from source. In the design GFD circuit, controller of voltage is performed first PI and then via PI like fuzzy logic. For current controller it is used the hysteresis band control method. For the different switching frequency and the different voltage values, the design of GFD circuit succes is tested via simulation. The tension which provided from GFD circuit is applied to the input stage of inverter. It is also feed a three-phase asynchron motor by tension which is obtained from inverter. The whole simulation works have been designed in the Matlab/Simulink environment.