Dynamic behaviour of a linear induction motor

Abstract

Although conventional rotating machines have been largely used to drive underground transportation systems, linear induction motors are also being considered for future applications owing to their indisputable advantages. A mathematical model for the transient behavior analysis of linear induction motors, when operating with constant r.m.s. currents, is presented in this paper.. Operating conditions, like phase short-circuit and input frequency variations and also some design characteristics, such as air-gap and secondary resistivity variations, can be considered by means of this modeling. The basis of the mathematical modeling is presented. Experimental results obtained in the laboratory are compared with the corresponding simulations and discussed in this paper.

A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects

“…Dynamic and steady-state modeling of the LIM has been widely addressed in the literature. In this regard, the literature can be divided into four categories, including modified mechanical equation-based models (MMEMs) [4][5][6], winding function-based models (WFMs) [7][8][9], field theory-based models (FTMs) [10][11][12][13][14], and Duncan's approach based models (DAMs) [15][16][17][18][19][20].…”

“…The braking force due to the end effect has been modeled by using the Taylor series, which is a function of linear velocity [4,5]. In [6], the resultant propulsive force was calculated using the air-gap flux density with consideration of the longitudinal end effect. The MMEMs are simple and can also predict the dynamic performance of LIMs.…”

Speed Control of Linear Induction Motor using Sliding Mode Controller Considering the End Effects

“…In contrast, a thrust correction coefficient introduced by [12] can be used to calculate an actual thrust to compensate for the end effect. A related method to deal with the problem is the introduction of an external force corresponding to the end effect into the RIM model to provide a more accurate modeling of an LIM considering the end effect, as shown in [13]. In another work [14], the authors proposed a new type of end-effect compensator.…”

Adaptive Approach to Motion Controller of Linear Induction Motor with Friction Compensation

“…On the other hand, there is a thrust correction coefficient introduced by [7] and [8] to calculate the actual thrust to compensate for the end effect. A related method to deal with the problem is that an external force corresponding to the end effect is introduced into the RIM model to provide a more accurate modeling of an LIM under consideration of the end effect as shown in [9]. In another work [10], [21], [22], extra compensating-winding was proposed to alleviate such problem.…”