Mathematical modeling of electromechanical characteristics of linear electromagnetic and induction-dynamic motors

The calculations of the electromechanical characteristics of the pulse action linear motor (PALM) with cylindrical symmetry are performed. The case of the motor power from the capacitor bank of a given capacitance is considered. The model of "field-circuit"was used for electromechanical characteristics modeling. The electromagnetic field was calculated by finite difference method taking into account the displacement of the secondary element (SE). The problem of circuit theory was solved together with the field problem (via flow coupling) in order to determine temporal dynamics of the current and voltage. The current and voltage in the primary circuit of the PALM, the force in the SE of the PALM, the value of the SE displacement was calculated for each time point. It is shown that the electromechanical characteristics depend on the design and material of the SE. © Published under licence by IOP Publishing Ltd

Research of heating procesess of linear induction motor

The report presents a simplified mathematical model of linear induction motor to study its thermal regimes. The model takes into account the heat removal from the active zone due to the movement of the secondary element. The estimation of influence of motor speed on the temperature of the elements of its design.В данной работе предлагается упрощенная математическая модель линейной индукционной машины для анализа тепловых режимов. Модель учитывает вынос тепла из активной зоны во время движения вторичного элемента. Оценивается влияние скорости ВЭ на нагрев движущихся частей при проектировании

Temperature calculation for linear induction motor in transport application with multiphysics approach

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. © Published under licence by IOP Publishing Ltd

Review of Multifunctional Melting Aggragate on Basis of Induction Crucible Furnace with Electromagnetic Rotator

In this paper, the liquid-phase reduction of metal is considered. A multifunctional melting aggregate is considered for this operation. The review of its operating modes and the relevance of the application at the metallurgical enterprises have been made. Two basic types of design are considered: with side and bottom electromagnetic rotators. The results of calculation and simulation of the device are presented.В данном докладе рассмотрен вопрос жидкофазного восстановления металла. Для данной операции рассмотрен многофункциональный плавильный агрегат. Произведен обзор режимов его работы и актуальность применения на металлургических предприятиях. Рассмотрены два основных типа конструктивного исполнения с боковым или торцевым электромагнитным вращателем. Представлены результаты расчета и моделирования устройства

Mathematical modeling of a tractional linear asynchronous motor

The results of modeling a linear induction motor using the method of detailed equivalent circuit