Abstract: The invention relates to a current-controlled converter and a method for controlling a converter of this type (U) comprising three phase outputs (R, S, T). The method comprises the following steps: a) application of a test current signal (ip) to a first (R) and a second (S) phase output of the three phase outputs (R, S, T) and isolation of the third phase output (T), when the converter (U) is activated for operation; b) respective measuring of the test signal (ip) and generation of a measuring signal (imR, imS) that is proportional to the measured test signal (ip) for both the first (R) and the second (S) phase output; c) determination of a correction value (?g1) that is dependent on said measuring signals (imR, imS); and d) control of the converter (U) in accordance with the determined correction value (?g1). The inventive method is used in particular in a converter for controlling a three-phase motor (M).

Abstract: A method and system for screening out empirically data collected from various steps of a technical process operating based on a first set of parameters, by utilizing a screening algorithm to reduce the size of the empirical data set, thus improving the modeling and revising of the technical process. The algorithm utilizes various classes associated with the empirical values and within each class performs an assessment with respect to preselected threshold values. The algorithm also performs an assessment with respect to another preselected threshold value, for the class as a whole.

Abstract: A method of controlling a four-dimensional vector for a controlled system by means of a discrete-value control element with a limited switching frequency. Reference values of a four-dimensional vector of the controlled system at the chosen switching time are calculated as a function of a selected reference switching status with its associated switching time. These reference values are used to calculate the time remaining to the next switching operation, thus enabling the energy difference to be minimized. The actual switching time and the required switching status are determined by a plausibility check. This provides a modulation and control method for high-power drives which combines the high steady-state quality of optimized pulse patterns with the high dynamic characteristics of multi-dimensional, status-oriented on-line control.