Patent ID: 6462974
Filing Date: 2002-10-08
Classification: H02M,Y02B

Abstract:
A method for controlling a three-phase pulse-width-modulated alternating current voltage regulator to obtain an output voltage of a desired magnitude and phase in a system including a set of four-quadrant switches, said method comprising the steps of:defining a set of active switching states and a set of zero switching states based on configurations of the set of four-quadrant switches; associating each active switching state with two of six space vectors, wherein the six space vectors delineate the voltage plane into six sectors; identifying one of the six sectors based on a position of the desired output voltage space vector; identifying two active switching states from the set of active switching states associated with the identified sector; identifying an appropriate zero switching state from the provided zero switching states based on the identified active switching states; and alternating between the two identified active switching states and the identified appropriate zero switching state to obtain the desired output voltage.