Abstract
The article describes the implementation of the mathematical model of the interrelated electromechanical and thermal processes in a linear induction motor using simulation software MATLAB-Simulink. The developed model consists of electromechanical model, thermal model and cooling system (hydraulic) model which all affect each other. Temperature calculations of the traction single-sided linear induction motor for urban transportation system are performed for different regimes. The calculation results using the developed thermal model based on the thermal detailed equivalent circuit demonstrate a close concurrence with the finite element model, temperature values differ less than in 3.8-4.8%. Safe operation range for a traction linear induction motor was determined taking into account the uneven longitudinal heating using different variants of cooling systems and coolant flow values. Recommendations on their selection were formulated. Based on the calculations and following experimental testing it was determined that operation with the maximum load with current of 270 A and load force of 8,000 N is possible with the cooling air flow rate of at least 2.2 m3/s.
Highlights
Linear induction motors (LIM) are a high potential type of the electric drive motor for the vehicular application, for the high-speed passenger transport
Investigations of the LIM are complicated by the fact that they noticeably differ from the rotary electric motors by the course of the electromagnetic processes, due to the longitudinal and transverse edge effects
LIM have significant differences in principles of thermal processes caused by construction features, as well as electromagnetic asymmetry lengthwise due to the longitudinal edge effect [11]
Summary
Linear induction motors (LIM) are a high potential type of the electric drive motor for the vehicular application, for the high-speed passenger transport. This type of transport is highly relevant to the modern metropolitan cities. Investigations of the LIM are complicated by the fact that they noticeably differ from the rotary electric motors by the course of the electromagnetic processes, due to the longitudinal and transverse edge effects. These effects and peculiarities of LIM are well-studied and described in [6,7,8,9,10].
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