By Fouad Giri
The complexity of AC motor keep watch over lies within the multivariable and nonlinear nature of AC laptop dynamics. fresh developments on top of things conception now give the chance to accommodate long-standing difficulties in AC vehicles regulate. this article expertly attracts on those advancements to use a variety of model-based keep an eye on designmethods to numerous AC automobiles. Contributions from over thirty most sensible researchers clarify how glossy regulate layout equipment can be utilized to accomplish tight velocity legislation, optimum vigorous potency, and operation reliability and security, through contemplating on-line kingdom variable estimation within the absence of mechanical sensors, energy issue correction, computer flux optimization, fault detection and isolation, and fault tolerant keep an eye on. Describing the entire keep an eye on method, either controller and observer designs are tested utilizing complicated nonlinear tools, balance and function are analysed utilizing robust ideas, together with implementation concerns utilizing electronic computing capability. different key positive aspects: - Covers the most kinds of AC cars together with triphase, multiphase, and doubly fed induction cars, wound rotor, everlasting magnet, and inside PM synchronous vehicles - Illustrates the usefulness of the complicated regulate equipment through commercial purposes together with electrical autos, excessive velocity trains, metal generators, and extra - comprises exact 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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Extra resources for AC Electric Motors Control Advanced Design Techniques and Applications
2. The components of the two-phase current (i d , i q ) have the same amplitude as those of the triphase current (i a , i b , i c ), that is, current amplitude is preserved by the Park transformation. The ﬁrst requirement leads to the following double equality: io = 1 n1 K o (i a + i b + i c ). (i a + i b + i c ) = 3 n2 24 AC Electric Motors Control This yields n1 1 Ko = . 14) The amplitude preservation requirement immediately entails the following expressions: i a (t) = Im cos(ωt), i b (t) = Im cos ωt − i d (t) = Im cos(ωt − ψ), 2π 3 i c (t) = Im cos ωt − , i q (t) = Im sin(ωt − ψ).
In the blocked rotor operation, the slip s is equal to 1. 9. The measurements to be performed in this test are the following: • • • • The three-phase active power Pbl . The three-phase reactive power Q bl . The line voltage Vbl . The line current Ibl . R and N can be calculated from the following equations: Pbl R = 2 − Rs , 3Ibl Vbl Ibl N= 2 −(R+Rs )2 ωs . 95) As N = σ L r ( ML srs )2 and R = Rr ( ML srs )2 , the knowledge of R and N allows to calculate the rotor time constant and the parameter σ , using the expressions Tr = Ls + N , R σ = N .
2006; Traore et al. 2008; El Fadili et al. 2012a). These problems are generally dealt with using model-based control approaches, that is, the controller or the observer design relies upon a given model that is supposed to accurately describe the machine of interest. , Lubineau et al. 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.
AC Electric Motors Control Advanced Design Techniques and Applications by Fouad Giri