By Jacek Kabziński
This contributed quantity is written through key experts operating in multidisciplinary fields in electric engineering, linking keep watch over thought, energy electronics, man made neural networks, embedded controllers and sign processing. The authors of every bankruptcy document the cutting-edge of some of the themes addressed and current result of their very own learn, laboratory experiments and winning functions. The provided strategies pay attention to 3 major components of interest:
· movement regulate in complicated electromechanical structures, together with sensorless control;
· fault analysis and fault tolerant regulate of electrical drives;
· new keep watch over algorithms for strength electronics converters.
The chapters and the entire publication own powerful monograph attributes. vital useful and theoretical difficulties are deeply and properly offered at the heritage of an exhaustive state-of the paintings evaluation. Many effects are thoroughly new and have been by no means released earlier than. famous keep watch over equipment like box orientated regulate (FOC) or direct torque keep an eye on (DTC) are referred as a place to begin for adjustments or are used for comparability. between quite a few keep watch over theories used to resolve specific difficulties are: nonlinear keep watch over, strong regulate, adaptive keep watch over, Lyapunov strategies, observer layout, version predictive keep watch over, neural keep watch over, sliding mode keep watch over, sign filtration and processing, fault prognosis, and fault tolerant control.
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Extra resources for Advanced Control of Electrical Drives and Power Electronic Converters
The speed observer should be applied in the ﬁrst plane to estimate the rotor flux vector and the rotor speed. In the remaining planes the rotor speed from the ﬁrst plane may be used in the full order Luenberger observer. Acknowledgments The work was ﬁnancially supported by NCN grant no 2011/01/B/ST7. References 1. Levi E (2008) Multiphase electric machines for variable-speed applications. IEEE Trans Ind Electron 55(5):1893–1909 2. Abdel-Khalik AS, Masoud MI, Williams BW (2012) Improved flux pattern with third harmonic injection for multiphase induction machines.
The BLF designed system with position constraints demonstrates rapid changes of velocity near the constraint boundary accompanied by high values of the current. To sum up, the worse transient of the position error is observed for the QLF-designed system and the best transient is obtained for the BLF-designed system with position and velocity constraints. 46 J. Kabziński et al. 5 3 time [s] Fig. 25 QLF BLF with x constr. BLF with x and v constr. 02 QLF BLF with x constr. BLF with x and v constr.
5 Time (s) exceeds the rated value. The rotor flux is always kept on the value which assures operation of the machine in an unsaturated region. As it can be seen in the last chart of Fig. 6 the third harmonic of the stator current appearing in the second plane has a different angle in relation to the fundamental in consecutive time intervals. The angle depends on the machine torque. For the very low torque only the magnetizing current components appear in the phase current. For high values of the torque the active current is great and the third harmonic generated in second plane is synchronized with such the angle that the maximum value of the phase current is increased.