A Novel Induction Machine Model and its Application in the Development of an Advanced Vector Control Scheme

Abstract

A novel induction motor model, that fully accounts for both the fundamental iron loss and main flux saturation, is derived. The model is then applied to the design of a modified rotor flux oriented control scheme. A rotor flux estimator and a rotor resistance identifier are both developed using the novel model, so that simultaneous compensation of main flux saturation, iron loss and rotor resistance variation is achieved.

Development of a mathematical model of frequency controlled induction electric drive

“…To determine the dependence , it is necessary to carry out a calculation and analysis of mechanical characteristics for each investigated mechanism. For example, under centrifugal loading, the moment of resistance of the mechanism is a complex function of speed [17]. In addition, for the numerical solution of the system of differential equations of the drive, it is necessary to write in an analytical form (calculate) the first derivative ( ⁄ value).…”

Grid synchronisation enhancement of a wind driven DFIG using adaptive sliding mode control

“…In addition, the machine parameters are obtained by identification experiments in which errors are unavoidable, and furthermore, these parameters may vary with ambient temperature, skin effect and exciting saturation. Considering the uncertainties of the machine parameters, it is assumed that the machine parameters in (18) are bounded as follows:…”

“…2. The following set of differential equations of the DFIG can be expressed as [18]:…”

Direct Torque Control of AC Machines

“…ð5:39Þ Figure 5.65 Space vector dynamic equivalent circuit of induction machine in an arbitrary reference frame [23] 0 ¼ dc am dt À R Fe i as À R Fe i ar þ R Fe L m c am…”

“…The equivalent iron loss resistance as a function of stator frequency is [23] R Fe ¼ 128:92 þ 8:242f þ 0:0788f 2 W ð Þ; f 50 Hz…”