By Fouad Giri
The complexity of AC motor keep an eye on lies within the multivariable and nonlinear nature of AC computing device dynamics. fresh developments on top of things concept now give the opportunity to house long-standing difficulties in AC automobiles regulate. this article expertly attracts on those advancements to use a variety of model-based keep an eye on designmethods to quite a few AC cars. Contributions from over thirty best researchers clarify how sleek keep an eye on layout tools can be utilized to accomplish tight pace rules, optimum vigorous potency, and operation reliability and security, by means of contemplating on-line nation variable estimation within the absence of mechanical sensors, strength issue correction, desktop flux optimization, fault detection and isolation, and fault tolerant keep an eye on. Describing the total keep an eye on process, either controller and observer designs are confirmed utilizing complicated nonlinear equipment, balance and function are analysed utilizing robust suggestions, together with implementation concerns utilizing electronic computing potential. different key positive aspects: - Covers the most varieties of AC cars together with triphase, multiphase, and doubly fed induction vehicles, wound rotor, everlasting magnet, and inside PM synchronous cars - Illustrates the usefulness of the complicated keep an eye on equipment through commercial purposes together with electrical autos, excessive pace trains, metal turbines, and extra - contains precise specialize in sensorless nonlinear observers, adaptive and powerful nonlinear controllers, output-feedback controllers, fault detection and isolation algorithms, and fault tolerant controllers
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Extra resources for AC Electric Motors Control Advanced Design Techniques and Applications
It includes three regulators of rotor speed, DC link voltage, and PFC, respectively. The controller is formally shown to meet its objectives, that is, accurate motor speed-reference tracking, tight regulation of the DC Link voltage, and PFC. Chapter 14 is on FDI in induction motors. Both MB and data-driven (DD) methods are developed. The MB approach involves SM observers based on residual evaluation and thresholding. DD methods, also referred to as “motor current signature analysis” (MCSA), are designed using processing techniques based on FFT, Hilbert transforms, and more advanced time/frequency combined analysis techniques.
3c) The variables may be currents, voltages, or magnetic ﬂuxes. An inherent property to (balanced) three-phase systems is that their homopolar components, that is, x0 = xa + xb + xc , are null all the time. In the latter, this property will be systematically used because all involved three-phase systems will be balanced. 1) is associated to a (ﬁctive) three-coordinate frame, say abc. This frame is sometimes also said to be stationary or stator-related. Then, the Concordia transformation is resorted to project the abc-frame onto the ﬁxed two-coordinate αβ-frame (Blaschke 1972).
76) dirq γ2 = −γ1 i rq − (ωs − pωm )i rd + φsq + pωm γ2 φsd + γ3 vrq . 4 Identiﬁcation of Induction Motor Parameters In this section, an experimental procedure is described to get estimates of the mechanical and the electrical parameters of a squirrel-cage induction machine. 1. 1 Identification of Mechanical Parameters Deceleration Test The present experiment consists, in ﬁrst running the motor, being loadless (TL = 0). Then, at some time the stator supply voltage is suddenly turned off. 81 Pn Usn Isn f ωmn kW V A Hz rad/min denoted ωmo .
AC Electric Motors Control Advanced Design Techniques and Applications by Fouad Giri