Traction linear induction motor of urban MAGLEV transport

Background: Currently, great attention is paid to the problem of increasing the efficiency of transport in cities. The use of urban Maglev transport with linear traction motors will improve the transport infrastructure of megacities. Aim: The use of magnetic-levitation transport with linear induction motors (LIM) is proposed. It is proposed to use traction linear induction motors (LIM) for urban Maglev transport, increasing the safety of a new type of transport. Materials and Methods: In this work, the design of a linear traction induction motor was proposed, which can increase lateral stabilization forces and safety of traffic by performing the lateral parts of the secondary element of a linear induction motor in the form of short-circuited windings. Results: Improving efforts of the lateral stabilization improve crew safety.

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Adjustable Squirrel-Cage Linear Induction Motor for Magnetic Levitation Transport

Transportation systems and technology ◽

10.17816/transsyst201734127-149 ◽

2017 ◽

Vol 3 (4) ◽

pp. 127-149 ◽

Cited By ~ 1

Author(s):

Vladimir A Solomin ◽

Anastasia A Bichilova ◽

Larisa L Zamshina ◽

Nadezhda A Trybitsina

Keyword(s):

Induction Motor ◽

High Speed ◽

Induction Motors ◽

Magnetic Levitation ◽

Frequency Control ◽

Linear Induction ◽

Linear Induction Motor ◽

Squirrel Cage ◽

Secondary Element ◽

Linear Induction Motors

The article deals with linear induction motor (LIM) with a squirrel-cage winding of the secondary element (SE), which functions as the armature of the machine. Linear location of squirrel-cage winding of the secondary element of LIM allowed suggesting a number of options for the regulation of the winding resistance of SE. Objective. Development and research of LIM with adjustable winding resistance of the secondary element for magnetic levitation transport, and the study of the properties of adjustable LIM. At the modern level of development of the electrical engineering, asynchronous electric drive and magnetic levitation transport, the primary method of changing the frequency rotation of motor and speed of linear motion of high-speed transport vehicles is frequency control. Frequency control allows changing the frequency of rotation of the machine and linear speed of LIM smoothly and in broad diapason. The high cost of static electronic converters of high power limits the large-scale application of frequency control. The increase of the current frequency also leads to lower torque and traction. Results. According to the authors, the application of the adjustable linear induction motors with variable resistances of short-circuited windings of the secondary elements will allow to expand the range of control of LIM, intended for high-speed magnetic levitation transport with the realisation of large traction, including the start (starting the vehicle) by means of current displacement in the groove of the secondary element of the LIM. Conclusion. The linear induction motors of this type, as well as the calculation of the magnetic field in the groove of the secondary element, and evaluation of the influence of the current displacement on the starting and controlling features of the machine are considered.

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Linear Induction Motors without Longitudinal Edge Effect

Transportation systems and technology ◽

10.17816/transsyst20195260-69 ◽

2019 ◽

Vol 5 (2) ◽

pp. 60-69 ◽

Cited By ~ 1

Author(s):

Vladimir A. Solomin ◽

Andrei V. Solomin ◽

Anastasia A. Chekhova ◽

Larisa L. Zamchina ◽

Nadezda A. Trubitsina

Keyword(s):

Edge Effect ◽

Induction Motors ◽

Magnetic Levitation ◽

Track Structure ◽

Linear Induction ◽

Linear Induction Motor ◽

High Speeds ◽

Longitudinal Edge ◽

Secondary Element ◽

Linear Induction Motors

Background: At high speeds of motion of the magnetic-levitation transport (MLT), linear induction motors (LIM) have a secondary longitudinal edge effect (SLEE). SLEE occurs when magnetic field of inductor interacts with the currents of the secondary element (SE) outside the MLT crew. SLEE reduces the efficiency of traction LIM. Therefore, the task of reducing the influence of SLEE is relevant. Aim: Development and research of a linear induction motor without a secondary longitudinal edge effect. Methods: To achieve this aim, new designs of linear induction motors have been proposed, which do not have a SLEE. The secondary element of the LIM (track structure of the MLT) is made of cylindrical conductive rods installed with the possibility of rotation. Traction LIM of the MLT equipped with two brushes that close the rods of the SE within the length of the inductor. When the MLT crew moves, the rods outside the inductor are not closed by brushes and there is no current in them. There will be no SLEE. Another method to solve this problem is using reed switches to close and open the rods of the secondary element. Results: The possibility of increasing the efficiency of the LIM has been achieved.

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Starting forces of the traction linear induction motor with adjustable resistance of the short-circuited winding of the secondary element

Transportation systems and technology ◽

10.17816/transsyst20217287-96 ◽

2021 ◽

Vol 7 (2) ◽

pp. 87-96

Author(s):

Vladimir A. Solomin ◽

Andrei V. Solomin ◽

Anastasia A. Chekhova

Keyword(s):

Induction Motor ◽

Induction Motors ◽

Rolling Stock ◽

Traction Forces ◽

Linear Induction ◽

Linear Induction Motor ◽

Urgent Task ◽

Traction Drives ◽

Secondary Element ◽

Linear Induction Motors

Background: Development and research of linear traction drives for Maglev transport is an urgent task. Linear induction motors can be used as traction machines for advanced rolling stock. Aim: Study of the starting characteristics of an adjustable traction linear induction motor with variable resistance by a short-circuited winding of the secondary element. Methods: Theoretically, relations were obtained for calculating the traction starting forces of an adjustable linear induction motor with various designs of a short-circuited winding of the secondary element. Results: Based on the obtained ratios, the calculations of the starting traction forces of linear induction motors intended for use in promising modes of transport were performed. Conclusion: The results of calculating the starting traction forces of adjustable linear induction motors make it possible to reasonably select the modes of starting the motor depending on the design of the secondary winding.

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New technology for manufacturing inductors of linear induction motors for magnetic-levitation transport

Transportation systems and technology ◽

10.17816/transsyst201843s1351-364 ◽

2018 ◽

Vol 4 (3 suppl. 1) ◽

pp. 351-364

Author(s):

Vladimir A. Solomin ◽

Andrei V. Solomin ◽

Nadezda A. Trubitsina ◽

Larisa L. Zamchina ◽

Anastasia A. Chekhova

Keyword(s):

Induction Motor ◽

High Speed ◽

Induction Motors ◽

Magnetic Levitation ◽

New Technology ◽

Manufacturing Technology ◽

Magnetic Suspension ◽

Linear Induction ◽

Linear Induction Motor ◽

Linear Induction Motors

Abstract. Background: Significant economic growth in many countries of the world can contribute to an increase in the speed of movement of modern and fundamentally new vehicles. This will increase the turnover of goods during the transportation of goods, revive international trade, increase the comfort of passengers and reduce their travel time. Aim: The solution of this problem is the development and wide application of high-speed magnetic-levitation transport (HSMLT) with linear traction engines. It is promising to use linear induction motors (LIM) for the HSMLT drive, which can have various design versions. Linear induction motors come with a longitudinal, transverse and longitudinal-transverse closure of the magnetic flux. LIM inductors can be installed on both high-speed transport crews and in the HSMLT track structure, as it was done in the People’s Republic of China, where express trains on magnetic suspension connect Shanghai with the airport and reliably operate for more than 10 years. The main elements of the inductor of a linear induction motor are a magnetic core (ferromagnetic core) a multiphase (usually three-phase) winding. With the development of high-speed magnetic-levitation transport, the issues of improving the manufacturing technology of various HSMLT devices, including the methods for producing inductors of linear induction motors, will become increasingly relevant. Traditionally, LIM inductors are assembled from pre-manufactured individual parts. Methods: An integral technology for manufacturing inductors of linear induction motors for high-speed magnetic-levitation transport is proposed and considered by the method of spraying materials onto a substrate through replaceable stencils. The new technology eliminates the alternate manufacture of individual assemblies and parts and their subsequent assembly to obtain a finished product. A method for determining the size of stencils for manufacturing one of the inductor variants of a linear induction motor is proposed as an example. Conclusion: Integral manufacturing technology is promising for the creation of high-speed magnetic-levitation transport.

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Classification of high-speed transport systems

Transportation systems and technology ◽

10.17816/transsyst20162142-51 ◽

2016 ◽

Vol 2 (1) ◽

pp. 42-51

Author(s):

Vladimir A Solomin ◽

Vladimir N Noskov ◽

Andrey V Solomin ◽

Mikhail Yu Pustovetov ◽

Nikolay S Flegontov

Keyword(s):

High Speed ◽

Induction Motors ◽

Magnetic Levitation ◽

Transport Systems ◽

Linear Induction ◽

Linear Induction Motor ◽

Wheel Drive ◽

Secondary Element ◽

Linear Induction Motors

This article proposes the variant of classification of high-speed ground transport systems, taking into account the availability of such existing and future with wheel drive and a magnetic levitation. Authors offer promising designs in electric vehicles with linear induction motors are considered. Paying attention to a variety of inductors structures and secondary elements of linear induction motors for transport purposes. Secondary element of traction linear induction motor is mounted on a carriage and can be in the form of conductive bus-section and a resistance, which is equally across its length and width. The secondary element may be made of an electrically conductive bus-section and a resistance which uneven across its width. In this case, at the edges of the tire has a smaller cross section or edge portions may be made of a material with lower electric conductivity and provide increased transverse self-stabilization efforts suspended in a magnetic field vehicle and safety of its movement. In the case of a short-circuited secondary winding element with adjustable resistance can be increased efforts at the start of the vehicle and reduce speed when approaching the next station. The principle of transverse stabilization of the vehicle may be based on the use of a pair of oppositely traveling magnetic fields.

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Mathematical Modeling of Currents in Secondary Element of Linear Induction Motor with Transverse Magnetic Flux for Magnetic-Levitation Transport

2019 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM) ◽

10.1109/icieam.2019.8742920 ◽

2019 ◽

Author(s):

Vladimir A. Solomin ◽

Andrei V. Solomin ◽

Larisa L. Zamshina

Keyword(s):

Mathematical Modeling ◽

Magnetic Flux ◽

Induction Motor ◽

Magnetic Levitation ◽

Transverse Magnetic ◽

Linear Induction ◽

Linear Induction Motor ◽

Secondary Element

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Design and Construction of a Mini Magnetic Levitation Train

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.891.253 ◽

2019 ◽

Vol 891 ◽

pp. 253-262

Author(s):

Sakhon Woothipatanapan ◽

Poonsri Wannakarn

Keyword(s):

Induction Motor ◽

Induction Motors ◽

Magnetic Levitation ◽

The Body ◽

Test Results ◽

Linear Induction ◽

Linear Induction Motor ◽

Drive Speed ◽

The Magnetic Field ◽

Design And Construction

This article presents the design and construction of a mini magnetic levitation train. The design of the train is based on the theory of 3-phase Linear Induction Motor (LIM). The train consists of two main sections. The first part is the linear induction motor, which is the part that drives the train to move. The second part is the magnetic field winding, which is the part that raises the body of the train to float over the rails. Such train can move forward/backward in the same principle as forward/reverse rotation control of 3-phase induction motors. For that reason, this research controls the forward/backward movement of the train with a magnetic contactor set by using the same circuit as the control of the rotation of the 3-phase induction motor. The designed train can lift 1 mm above the rails and move within a distance of 1.48 m along the length of the rails. The test results showed drive voltage, drive force, average time and drive speed of the train. From the details and results of this article can be used as a guide to create a larger magnetic levitation train, which can be used more effectively.

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Multifunctional linear induction motor with longitudinal-transverce magnetic flux for magnetic-levitational transport

Transportation systems and technology ◽

10.17816/transsyst201842167-179 ◽

2018 ◽

Vol 4 (2) ◽

pp. 167-179

Author(s):

Vladimir A. Solomin ◽

Andrei V. Solomin ◽

Victor V. Koledov ◽

Nadezda A. Trubitsina

Keyword(s):

Magnetic Flux ◽

High Speed ◽

Transverse Direction ◽

Induction Motors ◽

Magnetic Levitation ◽

Transverse Magnetic ◽

Track Structure ◽

Linear Induction ◽

Linear Induction Motor ◽

Linear Induction Motors

Background: Traction linear induction motors (LIM) at the current stage of human society development are the most promising for high-speed magnetic-levitation transport (MLT) and are already used in a number of commercial projects. Linear induction motors can be executed with longitudinal, transverse and longitudinal-transverse magnetic flux and have a large number of design options. Aim: In addition to traction efforts, LIM develops the forces of magnetic-levitation and lateral stabilization (self-stabilization). The efforts of magnetic-levitation of linear induction motors with longitudinal and transverse magnetic flux are very significant in the zone of large slides (at low speeds) and decrease with increasing speed of the magnetic-levitation transport. To a lesser extent, the decrease in slip (at high speeds) affects the magnetic-levitation forces developed by a number of design variants of linear induction motors with a longitudinal-transverse magnetic flux, in which magnetic fields traveling in a transverse direction towards each other are additionally used. This is explained by the fact that at high and low velocities MLT, the LIM slip will be equal to unity relatively oppositely running in the transverse direction of the magnetic fields and the magnetic suspension forces will be maximum. Materials and Methods: Running towards each other in the transverse direction of the MLT movement, magnetic fields cross the electrically conductive secondary element (playing the role of the track structure of the high-speed transport system) and induce electromotive forces in it, under the influence of which currents will flow. Results: As a result, cross counter-directional mechanical forces are created which, in the symmetrical arrangement of the MLT crew relative to the track structure, are mutually balanced and do not have any effect on the motion of the magnetic-levitation transport. At lateral (transverse) displacement of the high-speed transport on the magnetic suspension relative to the track structure, the equilibrium of the transverse mechanical forces is disrupted and, under the effect of the effort difference, the MLT crew will be automatically returned to the original symmetrical position. Conclusion: The distribution of magnetomotive forces (MMF) of a linear induction motor with a longitudinal-transverse magnetic flux, whose magnetic system is formed by the combination of longitudinally and transverse laminated cores, on the teeth of which the coils of a concentrated three-phase winding are located, is considered. The relations are represented in the form of a double Fourier series for calculating the resultant MMF value in the air gap of a linear induction motor with a longitudinal-transverse magnetic flux.

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