Equivalent Circuits for Single-Sided Linear Induction Motors

Abstract

Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, especially in the intermediate speed range. They have merits such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius and flexible road line. The theory of operation for these machines can be directly derived from rotary induction motors, but several issues involving the transversal edge and the longitudinal end effects, and half-filled slots at the primary ends, need to be investigated. In this paper, a T model equivalent circuit is proposed which is based on onedimensional magnetic equations of the air-gap, where half-filled slots are considered by an equivalent pole number. Then, it deduces two-axis equivalent circuits to study the SLIM dynamic performance. The theoretical analyses have been validated by experimental results on SLIM prototypes.

A DSP-based Robust Position Controller of a Single-sided Linear Induction Motor for Automatic Picking System

“…The structure of a single-sided three-phase LIM is shown in Figure 1, which is composed of the primary and secondary sides [9]. Three-phase windings with sinusoidal distribution are placed on the primary side similar to the stator of a rotary motor.…”

Performance Analysis of the Linear Induction Motor for the Deep-Underground High-Speed GTX

“…It is quiet and runs smoothly (no mechanical couplings). Finally, it is cheaper to maintain [7,8]. Fig.…”

Modeling and Simulating of Single Side Short Stator Linear Induction Motor with the End Effect

“…On the other hand, in LIMs, these effects become increasingly relevant with the increase in the relative velocity between the primary and the secondary. Thus, the end effects will be analyzed as a function of the velocity [8] and [10]. Figure 4a shows a view of a LIM.…”

“…In recent decades, a number of papers on the LIM performance analysis, involving steady and dynamic states, have been available [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Gieras et al [4] and Faiz et al [5] developed an equivalent circuit by superposing the synchronous wave and the pulsating wave caused by the end effect.…”