The paper deals with a discrete pulse modulation strategy oriented to a digital control of quasi resonant inverter (QRI) feeding induction machines. As (QRI) is adopted a simple structure, which has a switch connected between dc voltage source and resonant inductor. The proposed digital predictive control algorithm is able to predict step by step the inverter state switching and to control inserted switch of the (QRI), according to field oriented strategy. Because of the different periods of the QRI resonant cycle and of the sampling interval of the adopted control algorithm the reference space vector is adequately modulated. The paper shows the bigger dynamic performances obtainable by means of the use of a full digital vectorial control of induction machines feed by a quasi resonant dc link inverter.
A MODULATION STRATEGY ORIENTED TO DIGITAL CONTROL OF QUASI RESONANT DC LINK INVERTER FEEDING ASYNCHRONOUS MOTORS
ATTAIANESE, Ciro;
1998-01-01
Abstract
The paper deals with a discrete pulse modulation strategy oriented to a digital control of quasi resonant inverter (QRI) feeding induction machines. As (QRI) is adopted a simple structure, which has a switch connected between dc voltage source and resonant inductor. The proposed digital predictive control algorithm is able to predict step by step the inverter state switching and to control inserted switch of the (QRI), according to field oriented strategy. Because of the different periods of the QRI resonant cycle and of the sampling interval of the adopted control algorithm the reference space vector is adequately modulated. The paper shows the bigger dynamic performances obtainable by means of the use of a full digital vectorial control of induction machines feed by a quasi resonant dc link inverter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
