Patent ID: 9124195
Filing Date: 2015-09-01
Classification: H02M,H02P

Abstract:
1. A method for controlling a three-phase converter having a voltage intermediate circuit by means of pulse-width modulation for supplying a three-phase system, which comprises the steps of: operating the three-phase converter with at least two different modulation methods selected from the group of modulation methods consisting of single-phase clocking, two-phase clocking and three-phase clocking; making changeovers between the at least two different modulation methods depending on a rotating-field frequency of the three-phase system; operating the three-phase converter with a modulation method of the three-phase clocking during starting or at low rotating-field frequencies of the three-phase system; and operating the three-phase converter with the modulation method of the two-phase clocking above a minimum rotating-field frequency of the three-phase system.