METHOD FOR CONTROLLING AN INVERTER UNDER CONSIDERATION OF ACTUATING AND MEASUREMENT DELAYS BY MEANS OF AN OBSERVER

摘要

In order to provide a method for controlling an inverter (1) comprising controllable power semiconductors, wherein actual state values x^(k) describing the state of the inverter (1) are compared to target state values x Soll(k) to obtain control difference values, the control difference values are fed to a control unit (14, 16) which generates actuating voltage values u(k) at the output, and a control electronics unit (19) supplies control signals depending on the actuating voltage values u(k) and transmits them to the power semiconductors (S1, S2) of the inverter (1), wherein the control unit (14, 16) generates such actuating voltage values u(k) that the control difference values are as small as possible, taking delay effects into consideration, it is proposed that the actual state values x^(k) are calculated by an observation unit (21) based on the actuating voltage values u(k), wherein the observation unit (21) models the inverter (1) and takes delay effects into consideration, so that the actual state values x^(k) of delay effects correspond to released non-delayed current measurement values.