By Fouad Giri
The complexity of AC motor regulate lies within the multivariable and nonlinear nature of AC computing device dynamics. contemporary developments up to speed thought now give the opportunity to house long-standing difficulties in AC cars keep an eye on. this article expertly attracts on those advancements to use quite a lot of model-based keep an eye on designmethods to a number of AC vehicles. Contributions from over thirty most sensible researchers clarify how smooth keep watch over layout tools can be utilized to accomplish tight pace rules, optimum full of life potency, and operation reliability and defense, by way of contemplating on-line country variable estimation within the absence of mechanical sensors, strength issue correction, computing device flux optimization, fault detection and isolation, and fault tolerant keep watch over. Describing the total regulate strategy, either controller and observer designs are tested utilizing complex nonlinear tools, balance and function are analysed utilizing robust strategies, together with implementation concerns utilizing electronic computing capacity. different key positive factors: - Covers the most forms of AC automobiles together with triphase, multiphase, and doubly fed induction automobiles, wound rotor, everlasting magnet, and inside PM synchronous cars - Illustrates the usefulness of the complicated keep watch over tools through business functions together with electrical autos, excessive pace trains, metal generators, and extra - contains distinct specialise in sensorless nonlinear observers, adaptive and strong nonlinear controllers, output-feedback controllers, fault detection and isolation algorithms, and fault tolerant controllers
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Additional info for AC Electric Motors Control Advanced Design Techniques and Applications
2000). Then, the obtained models turn out to be linear and of quite limited use. , De Leon et al. 2001). Furthermore, these nonlinear models proved to be tractable and thus have been widely AC Electric Motors Control: Advanced Design Techniques and Applications, First Edition. Edited by Fouad Giri. © 2013 John Wiley & Sons, Ltd. Published 2013 by John Wiley & Sons, Ltd. 18 AC Electric Motors Control used in control design. That is, most control designs presented in this book are based on the models that are by now standard.
69) 32 AC Electric Motors Control dφsq Msr 1 i rq + vsq , = − φsq − ωs φsd + dt τs τs dird γ2 = −γ1 i rd + (ωs − pωm )i rq + φsd − pωm γ2 φsq − γ2 vsd + γ3 vrd , dt τs dirq γ2 = −γ1 i rq − (ωs − pωm )i rd + φsq + pωm γ2 φsd − γ2 vsq + γ3 vrq . 72) The parameters γ1 , γ2 , γ3 , σ , and τs are deﬁned as follows: γ1 = Rr L 2s +Rs Msr2 , σ L r L 2s γ2 = Msr , σ Ls Lr γ3 = 1 , σ Lr σ =1− Msr2 , Ls Lr τs = Ls . Rs By choosing a reference frame linked to the stator voltage, the stator and grid currents are made directly related to the active and reactive powers.
To achieve these objectives, an adaptive control strategy is developed, based on a nonlinear model of the whole “converter-motor” set. The adaptation feature is motivated by the uncertain nature of some motor characteristics, for example, mechanical parameters. The closedloop system stability and performance properties are formally analyzed using averaging theory. 5 Industrial Applications of AC Motors Control The last part of the book consists of three chapters devoted to applications of AC motors in some industrial ﬁelds.
AC Electric Motors Control Advanced Design Techniques and Applications by Fouad Giri