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Electric Drive Systems Dynamics: Selected Problems [Kõva köide]

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Electric Drive Systems Dynamics: Selected Problems
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9780444988676.html
Märksõnad:
Most books concerning the dynamics of electromechanical power conversion are more or less based on the general approach to such systems, where the problem of electric drives is regarded as rather marginal, in spite of the fact that electric drives in modern industry take up about 80% of the total power used in a given plant. Recently, the field of electric drives has experienced rapid expansion caused mainly by the advances in semiconductors. This book characterizes the present state of knowledge on the dynamics of electric drives. The fundamental problems on the dynamics of electric driving systems, their analysis, synthesis and industrial applications are presented. The method of constructing mathematical models of electromechanical systems is described, based on the Hamilton principle; state variable equations; and the so-called ``independent'' equations. Conversely, the control of such systems is concerned with the problems of optimization, and some of the most commonly used methods of optimization concerning the d.c. and a.c. drives are described. The last chapter discusses some industrial applications of several structures of driving systems.
1 . Motion Equations and Mathematical Models of Electromechanical
Systems. Methods of construction of electromechanical system models. The
method of physical laws and principles. Hamilton's Principle.
Electromechanical motion equation for driving systems.
2. The Method of State
Spaces and Independent Equations for Analysis of Linear Stationary Systems.
States of dynamical systems. State space models of dynamic systems. Solving
state equations. The method of independent equations.
3. Separately Excited
d.c. Motors Operating under Stochastic Disturbances. The method of analysis.
Separately excited d.c. motors operating under stochastic disturbances.
4.
Transient States of a Ward-Leonard System. Open-loop systems. Block diagram
of an open-loop Ward-Leonard system. Block diagram of an open-loop
Ward-Leonard system with elastic driving shaft. Closed-loop systems. Choice
of regulator settings for Ward-Leonard systems. Digital dynamics simulation
of an open-loop Ward-Leonard system. Digital dynamics simulation of an
open-loop Ward-Leonard system with elastic driving shaft. Digital dynamics
simulation of a closed-loop Ward-Leonard system.
5. Parametric Optimization
of Electric Drives - Absolute Value and Symmetric Optima. Introduction:
Parametric optimization and optimal control. Parametric optimization -
Absolute value and symmetric optima. Absolute value optimum criterion.
Symmetric optimum criterion. Parametric optimization of systems using V
quadratic forms. Choosing regulators for driving systems with a subordinated
current regulation circuit. Conclusions. Methods of parametric optimization
of regulation systems under stochastic disturbances. Parametric optimization
of driving systems under random loads.
6. Optimal Control of Driving Systems.
Introduction. General formulation of the optimal control problem. Quality
indices of control. Minimum time control. Optimal control of separately
excited d.c. motors. Optimal control of systems with separately excited d.c.
motors. Optimal control of synchronous motors. Stabilization of the angular
velocity of induction motors. Determining optimal controls by Neuman Series.
7. Driving Systems with Elastic Elements. Free oscillation frequency of chain
systems. Analysis of the dynamics of systems with elastic shafts. Damping
properties of driving systems with d.c. Separately excited motors under
stochastic disturbances. Oscillations in chain systems of a motor-industrial
appliance under harmonic loads.
8. Examples of Electric Driving Systems for
some Industrial Appliances. Electric driving systems of paper-making
machines. Electric drives for printing machines. Electric drives for pumps
and fans. Electric drives for industrial robots. The technical and economic
parameters involved in selecting an electric driving system. References.
Symbols employed. Index.