Adaptive input-output linearizing control of induction motors

Robust nonlinear control strategy to maximize energy capture in a variable speed wind turbine with an internal induction generator

“…The mechanical subsystem dynamics in (5) can be utilized to show that τem(t) is bounded. Above boundedness statements can be utilized along with (24), (25), and (33) to show that Ψs(t), Ψr(t), ωs(t) ∈ L∞. Since ω(t) andω(t) are bounded, it is clear thatρz( · ) ∈ L∞.…”

“…A two-phase equivalent machine representation was introduced in [29] and is utilized in this paper with the assumptions of equal mutual and autoinductances as well as a linear magnetic circuit. The electrical dynamics of the internal induction generator can be described by the following dynamic equations (for the exact transformation of three-phase variables into two-phase ones used in this paper, refer to [24]): I r Ī raĪr b T ∈ R 2 are the stator and rotor currents, re-…”

“…The most commonly used generator is the induction generator, of which the types include cage, wound rotor and doubly fed induction generator (DFIG). The dynamic modeling [16][17][18][19][20] and control [21][22][23][24][25][26][27][28] of induction machines have been extensively researched. Thringer and Luomi [16] examined the validity of various dynamic models of induction machines to include the fifth-order Park model and other reduced order models by predicting the low frequency dynamic response of a 15 kW induction machine and comparing results to actual measurements.…”

An online rotor time constant estimator for induction machine

“…Consider a state-space model of the system given by (cf. [2], [17], [18]) (1) where with as the position of the rotor, is the number of pole pairs, are the (two-phase equivalent) stator currents, are the (two-phase equivalent) rotor flux linkages, and are the (two-phase equivalent) stator voltages.…”

Cascade sliding mode control of a field oriented induction motors with varying parameters

“…In the last few years, many versions of a nonlinear state feedback control schemes, such as, input-output feedback linearization ( (Marino et al, 1993)), passivity-based control ( (Ortega & Espinoza, 1993;Ortega et al, 1996)) and Backstepping (Kanellakopoulos et al (1991); Krstic et al (1995)) have been applied to the IM drive. Adaptive versions of most of those nonlinear control schemes are also available for the effective compensation of the parameter uncertainties and disturbances in the induction motor systems (Ebrahim & Murphy (2006); Marino et al (1993); ; Rashed et al (2006)). A fundamental problem in the design of feedback controllers is that of stabilizing and achieving a specified transient performance in the presence of external disturbances and plant parameter variations.…”