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

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.

scholarly journals Traction linear induction motor of urban MAGLEV transport

2020 ◽  
Vol 6 (1) ◽  
pp. 120-128
Author(s):  
Anastasia A. Chekhova ◽  
Andrei V. Solomin
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Magnetic Levitation ◽  
Transport Infrastructure ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Traction Motors ◽  
New Type ◽  
Secondary Element ◽  
Linear Induction Motors

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.

scholarly journals Adjustable Squirrel-Cage Linear Induction Motor for Magnetic Levitation Transport

2017 ◽  
Vol 3 (4) ◽  
pp. 127-149 ◽  
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.

scholarly journals Linear Induction Motors without Longitudinal Edge Effect

2019 ◽  
Vol 5 (2) ◽  
pp. 60-69 ◽  
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.

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

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.

scholarly journals Classification of high-speed transport systems

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.

The Proactive Desk: A New Haptic Display System for a Digital Desk Using a 2-DOF Linear Induction Motor

2004 ◽  
Vol 13 (2) ◽  
pp. 146-163 ◽  
Author(s):  
Haruo Noma ◽  
Shunsuke Yoshida ◽  
Yasuyuki Yanagida ◽  
Nobuji Tetsutani
Keyword(s):  
Induction Motor ◽  
Haptic Feedback ◽  
Induction Motors ◽  
Physical Object ◽  
Haptic Display ◽  
Display System ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Physical Objects ◽  
First Time

The Proactive Desk is a new digital desk with haptic feedback. The concept of a digital desk was proposed by Wellner in 1991 for the first time. A typical digital desk enables a user to seamlessly handle both digital and physical objects on the desk with a common GUI standard. The user, however, handles them as virtual GUI objects. Our Proactive Desk allows the user to handle both digital and physical objects on a digital desk with a realistic feeling. In the Proactive Desk, two linear induction motors are equipped to generate an omnidirectional translational force on the user's hand or on a physical object on the desk without any mechanical links or wires, thereby preserving the advantages of the digital desk. In this article, we first discuss applications of a digital desk with haptic feedback; then we mention the design and structure of the first trial Proactive Desk, and its performance.

scholarly journals Linear Induction Motors in Transportation Systems

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2549
Author(s):  
Ryszard Palka ◽  
Konrad Woronowicz
Keyword(s):  
Induction Motors ◽  
Prediction Method ◽  
Transportation System ◽  
Transportation Systems ◽  
Urban Transport ◽  
Major Constituent ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Rotary Machine ◽  
Linear Induction Motors

This paper provides an overview of the Linear Transportation System (LTS) and focuses on the application of a Linear Induction Motor (LIM) as a major constituent of LTS propulsion. Due to their physical characteristics, linear induction motors introduce many physical phenomena and design constraints that do not occur in the application of the rotary motor equivalent. The efficiency of the LIM is lower than that of the equivalent rotary machine, but, when the motors are compared as integrated constituents of the broader transportation system, the rotary motor’s efficiency advantage diminishes entirely. Against this background, several solutions to the problems still existing in the application of traction linear induction motors are presented based on the scientific research of the authors. Thus, solutions to the following problems are presented here: (a) development of new analytical solutions and finite element methods for LIM evaluation; (b) comparison between the analytical and numerical results, performed with commercial and self-developed software, showing an exceptionally good agreement; (c) self-developed LIM adaptive control methods; (d) LIM performance under voltage supply (non-symmetrical phase current values); (e) method for the power loss evaluation in the LIM reaction rail and the temperature rise prediction method of a traction LIM; and (f) discussion of the performance of the superconducting LIM. The addressed research topics have been chosen for their practical impact on the advancement of a LIM as the preferred urban transport propulsion motor.

scholarly journals Combination Traction and Lateral Stabilisation System for Magnetic Levitation Transport

2017 ◽  
Vol 3 (4) ◽  
pp. 107-126
Author(s):  
Andrey V Solomin
Keyword(s):  
Mathematical Model ◽  
Magnetic Flux ◽  
Induction Motor ◽  
Transverse Magnetic ◽  
Air Gap ◽  
Human Society ◽  
Magnetomotive Force ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Secondary Element

The problems of improvement of modern types of transport and creation of new ones are important and topical for the human society development. One of the most promising and environmentally-friendly modes of transport is the high-speed maglev transport, moving at speeds of approximately 500 km/h. Objective. Justification of linear induction motor, development and research of various constructions of this type of motors. Methods. Description of linear induction motor with longitudinal and transverse magnetic flux for combined traction and lateral stabilisation system of maglev transport, having increased lateral stabilisation forces. The mathematical modelling of magnetomotive force (MF) in the air gap of traction linear motor of this type has been conducted. To analyse the MF the assumption has been made about even distribution of magnetic induction in the air gap in transverse direction and its sinusoidal longitudinal direction, making it possible to develop new mathematical model of MF distribution in the air gap of linear induction motor with longitudinal and transverse magnetic flux Results. The developed mathematical model for calculation of MF on traction linear machine will enable increasing accuracy of traction and lateral stabilisation combined system forces for maglev transport. The same relates to mutual location of inductor to the secondary element. All this proves the successful ten-year commercial operation experience of magnetically suspended train carrying passengers from an airport to Shanghai, P.R. China. The values of traction and lateral stabilisation forces of linear induction motor with longitudinal and transverse magnetic flux is greatly influenced by the character of current distribution in the secondary element. The character itself is influenced by MF distribution in the air gap.

Sign in / Sign up

Export Citation Format

Share Document