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Direct self-control (DSC) of inverter-fed induction machine

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1 Author(s)
M. Depenbrock ; Ruhr-Univ. Bochum, West Germany

The new direct self-control (DSC) is a simple method of signal processing that gives converter-fed three-phase machines an excellent dynamic performance. To control the torque of, say, an induction motor, it is sufficient to process the measured signals of the stator currents and the total flux linkages only. In the basic version of DSC, the power semiconductors of a three-phase voltage source inverter are directly switched on and off via three Schmitt triggers, comparing the time integrals of line-to-line voltages to a reference value of desired flux, if the torque has not yet reached an upper-limit value of a two-limit torque control. Optimal performance of drive systems is accomplished in steady state as well as under transient conditions by combination of several two-limit controls

Published in:

IEEE Transactions on Power Electronics  (Volume:3 ,  Issue: 4 )