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In order to improve the redundancy performance, Linear Induction Motor (LIM) could be designed to have m primaries (m is an integer and m≥2) and just one secondary. When anyone of the primaries runs in failure model, other remanent primaries could accomplish the scheduled target. The paper represents equivalent circuit of double primaries coupling (m=2) LIM based on the research of mathematic model...
Rotary machines have limitations at linear moving systems. So linear motors make good used of linear actuator. The purpose of this paper is concerned with the characteristic analysis to thickness of secondary conductor in TLIM using axisymmetric model. Characteristic equations of TLIM are obtained from voltage equation. Using finite element method (FEM), parameters of voltage equation are calculated...
The linear induction motor (LIM) drives using conventional direct thrust control (DTC) schemes have drawbacks of large thrust ripples in low speed range and so on. In this paper, the thrust ripples of the DTC-based LEVI drives are theoretically analyzed. A novel switching scheme using synthesized voltage vector and magnitude modulation method is proposed to replace the conventional switching table...
Based on magnetic circuit complex power method, through analyzing linear induction motor two dimensional magnetic flux density equations, this paper achieves T model equivalent circuit considering end effects, primary half filled slots, yoke magnetic saturation and back iron resistance. The method uses four coefficients to describe influence on mutual inductance and secondary resistance brought by...
This paper presents an intelligent single neuron (SN) vector control scheme for the linear induction motors (LIM) in order to achieve a higher performance. The dynamic model of LIM taking into account end-effects is derived. The supervisory Delta study rule was combined with non-supervisory Hebb study rule and the improved study and control algorithms are adopted to achieve the parameter optimum and...
This paper presents the analysis of single-sided linear induction motors (SLIMs) for the application in various systems demanding direct linear motion. In order to investigate the characteristics of linear induction motor according to secondary conductor structures, five types of secondary slot shape usually used in rotary motors, were set and the equivalent circuit of SLIM is proposed and the equivalent...
A method for calculating the performance of double-sided linear induction motor (DLIM) with short secondary is presented in this paper. The analytical solution of air gap flux density is firstly deduced from one-dimensional (1-D) electromagnetic field equations, then in the equivalent circuit of the motor, to take both longitudinal and transverse end effects into account, the correction coefficients...
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