By Jacek Kabziński
This contributed quantity is written by way of key experts operating in multidisciplinary fields in electric engineering, linking regulate thought, strength electronics, synthetic 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 profitable purposes. The offered options pay attention to 3 major components of interest:
· movement keep an eye on in complicated electromechanical platforms, together with sensorless control;
· fault analysis and fault tolerant keep an eye on of electrical drives;
· new keep an eye on algorithms for strength electronics converters.
The chapters and the total ebook own powerful monograph attributes. vital functional and theoretical difficulties are deeply and properly offered at the heritage of an exhaustive state-of the artwork evaluation. Many effects are thoroughly new and have been by no means released sooner than. recognized keep an eye on tools like box orientated regulate (FOC) or direct torque regulate (DTC) are referred as a place to begin for adjustments or are used for comparability. between various keep an eye on theories used to unravel specific difficulties are: nonlinear regulate, strong keep watch over, adaptive regulate, Lyapunov thoughts, observer layout, version predictive keep an eye on, neural keep an eye on, sliding mode regulate, sign filtration and processing, fault analysis, and fault tolerant control.
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Extra resources for Advanced Control of Electrical Drives and Power Electronic Converters
This means that the rotor flux is reduced in the phase system and do not 24 Fig. 5 Transients of the speed and the electromagnetic variables during starting and loading of machine Z. 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.
To remove the difﬁculties caused by the unknown control gain φ, the motion Eq. (2) is transferred into: l d v ¼ i À ATo nðx; vÞ; dt ð5Þ where: l¼ m ; u Ao ¼ 1 A: u ð6Þ The control objective is that the motor position has to follow a smooth, bounded reference xd ðtÞ: 30 J. Kabziński et al. jxd ðtÞj xmax : ð7Þ It is assumed that the derivatives of the reference are bounded as well. It is required that the tracking error denoted by: ex ¼ xd À x ð8Þ is constrained for any t by a pre-deﬁned, rigorous inequality: jex ðtÞj\Dex ; ð9Þ for any initial conditions that assure jex ð0Þj\Dex .
49) and (50) has the following form: 1 1 2 u12ðnÞ ¼ m12ðnÞ þ d8ðnÞ isðnÞ q11ðnÞ À d11ðnÞ q22ðnÞ þ d4ðnÞ q21ðnÞ q11ðnÞ ; d12ðnÞ Tm1ðnÞ ð61Þ u21ðnÞ ¼ 1 d10ðnÞ Àd7ðnÞ m21ðnÞ À d6ðnÞ q22ðnÞ : ð62Þ After application of (61) and (62) the linearized model has the following form: for all n. n dq11ð1Þ 1 X 1 ¼ q12ðnÞ À m0 ; J 1 J ds ð63Þ dq12ðnÞ 1 ¼ Àq12ðnÞ þ m12ðnÞ ; Tm1ðnÞ ds ð64Þ dq21ðnÞ ¼ À2d7ðnÞ Àq21ðnÞ þ m21ðnÞ ; ds ð65Þ Sensorless Control of Polyphase Induction Machines 17 Similarly to the system based on stator current and rotor flux vectors, Eqs.
Advanced Control of Electrical Drives and Power Electronic Converters by Jacek Kabziński