Download e-book for kindle: AC Electric Motors Control Advanced Design Techniques and by Fouad Giri

By Fouad Giri

The complexity of AC motor keep watch over lies within the multivariable and nonlinear nature of AC desktop dynamics. contemporary developments up to speed concept now give the chance to accommodate long-standing difficulties in AC vehicles keep watch over. this article expertly attracts on those advancements to use quite a lot of model-based keep watch over designmethods to numerous AC vehicles. Contributions from over thirty most sensible researchers clarify how sleek regulate layout tools can be utilized to accomplish tight pace rules, optimum lively potency, and operation reliability and safeguard, via contemplating on-line nation variable estimation within the absence of mechanical sensors, strength issue correction, laptop flux optimization, fault detection and isolation, and fault tolerant keep watch over. Describing the entire keep an eye on strategy, either controller and observer designs are confirmed utilizing complex nonlinear equipment, balance and function are analysed utilizing robust recommendations, together with implementation concerns utilizing electronic computing capability. different key gains: - Covers the most forms of AC automobiles together with triphase, multiphase, and doubly fed induction automobiles, wound rotor, everlasting magnet, and inside PM synchronous vehicles - Illustrates the usefulness of the complex regulate equipment through commercial functions together with electrical automobiles, excessive pace trains, metal generators, and extra - contains precise concentrate on sensorless nonlinear observers, adaptive and strong nonlinear controllers, output-feedback controllers, fault detection and isolation algorithms, and fault tolerant controllers

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Specifically, one has εo = K o (εa + εb + εc ) for some proportional constant K o to be defined later. To the fictive MMF εo is associated a fictive current, denoted i o , referred to homopolar. Accordingly, one has εo = n 2 i o . 12) the MMFs by the corresponding currents one gets the following relation between the three-phase current (i a , i b , i c ) (traversing n 1 turns) and the equivalent two-phase current (i d , i q ) (traversing n 2 turns): ⎡ ⎤ cos(ψ) id n 1 ⎢ ⎣ iq ⎦ = ⎣ − sin(ψ) n2 io K ⎡ o 2π 3 − 2π 3 cos ψ − − sin ψ Ko 4π 3 − 4π 3 cos ψ − − sin ψ Ko ⎤⎡ ⎤ ia ⎥⎣ ⎦ ⎦ ib .

The models thus obtained prove to be reasonably accurate and tractable for control design. 5; and a conclusion and a reference list end the chapter. 2 Synchronous Machine Structures Like all rotating electrical machines, the synchronous machine is an energy converter. It is reversible in the sense that it can operate either as a current generator (alternator) or as a motor. 1). The stator is composed of three identical windings symmetrically distributed in space (120◦ between them). The windings are fixed in notches on the magnetic circuit.

1 Modeling Assumptions The following assumptions will prove to be useful in simplifying the machine modelling procedure, leading to tractable models: A1: The induced electromagnetic force is assumed to be sinusoidal (with quasisinusoidally distributed stator winding). A2: Iron permeability in the machine is assumed to be infinite. Therefore, the reluctance of the flux path is composed solely of the air gap and leakage reluctances. This amounts to supposition of the magnetic characteristic to be linear and ignore magnetic saturation.

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AC Electric Motors Control Advanced Design Techniques and Applications by Fouad Giri


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