scholarly journals INCREASED RELIABILITY OF THE BEARING UNIT OF A TRACTION MOTOR OF THE SWITCHED RELUCTANCE TYPE FOR TRANSPORT SYSTEMS

2021 ◽  
Vol 6 (4(54)) ◽  
pp. 29-32
Author(s):  
Ekaterina Evgenievna Miroshnichenko
Keyword(s):  
Switched Reluctance Motor ◽  
Air Gap ◽  
Transport Systems ◽  
Traction Motor ◽  
Switched Reluctance ◽  
Magnetic Attraction ◽  
Bearing Unit ◽  
Reluctance Motor ◽  
The Subject

The subject of research is the traction switched reluctance motor for transport systems with uneven air gap. The calculation of the forces of one-way magnetic attraction during displacement of the rotor is carried out. It has been shown that these forces reach high values and exert an influence on the bearings leading to their premature wear. Measures are proposed to reduce the influence of one-way magnetic attraction forces and to increase the reliability of the bearing unit.

scholarly journals Effect of the forces of one-way magnetic attraction on the reliability of the bearing unit of the traction switched reluctance motor

2021 ◽  
Vol 2131 (4) ◽  
pp. 042078
Author(s):  
Y Y Miroshnichenko
Keyword(s):  
Rotation Axis ◽  
Switched Reluctance Motor ◽  
Air Gap ◽  
Switched Reluctance ◽  
Design Elements ◽  
Magnetic Attraction ◽  
Axis Of Rotation ◽  
First Case ◽  
Reluctance Motor ◽  
Axis Of Symmetry

Abstract The subject of the research is a traction switched reluctance motor with an uneven air gap. The main purpose of the work is to determine the forces of one-way magnetic attraction, evaluate and analyze these forces, develop measures to reduce the forces to an acceptable value. In the article, the forces of disbalancement and the forces of one-way magnetic attraction are considered in the relationship. The finite element method was used to determine the main parameters of the switched reluctance motor. The studies were carried out for two idealized variants of the location of the rotor rotation axis. In the first case, the axis of rotation is combined with the axis of symmetry of the stator. The second option considers the case of displacement of the axis of rotation together with the axis of symmetry of the rotor. It is determined that the resulting force of one-way magnetic attraction with an uneven air gap reaches significant values and significantly exceeds the permissible values. An algorithm for calculating the characteristics of a switched reluctance motor is proposed, which takes into account the tolerances for the manufacture of its design elements. The algorithm allows you to adjust the requirements for the bearings used, ensure the required level of reliability of the traction switched reluctance motor (SRM) and predict the level of vibration and noise.

scholarly journals Switched reluctance traction motor with improved indicators of the reliability of bearing units for an electric rolling stoсk

2021 ◽  
Vol 7 (2) ◽  
pp. 97-105
Author(s):  
Ekaterina E. Miroshnichenko
Keyword(s):  
Rolling Stock ◽  
Production Cycle ◽  
The Finite Element Method ◽  
Traction Motor ◽  
Switched Reluctance ◽  
Magnetic Attraction ◽  
Bearing Unit ◽  
Electric Rolling Stock ◽  
Reluctance Motor

Aim: Establishment of preconditions for the introduction of a switched reluctance motor into the system of traction drive of an electric rolling stock by improving the performance of the bearing unit. Methods: Calculations were carried out using the finite element method. Results: It was found that the calculated values ​​of force of a one-way magnetic attraction applied to the bearing unit are tens of times higher than the permissible values. The result is accelerated wear and failure of the bearings. An algorithm is proposed which takes into account the influence of one-way magnetic attraction forces in an uneven air gap. Conclusion: The algorithm makes it possible to change the production cycle and improve the consumer quality of the switched reluctance traction motor.

Analysis of Main Dimensions Effects on Performance of Transverse Flux Switched Reluctance Motors

2011 ◽  
Vol 383-390 ◽  
pp. 1921-1925
Author(s):  
Zhi Gang Wang ◽  
Ping Tan ◽  
Sui Chun Qu
Keyword(s):  
Switched Reluctance Motor ◽  
Air Gap ◽  
Switched Reluctance Motors ◽  
Stator Core ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Transverse Flux

The transverse flux switched reluctance motor (TFSRM) has the advantage of switched reluctance motors and transverse flux motor. This paper examines the effects of the main dimensions such as the polar distance, the stator core, the length of air gap ,etc, on the performance.

scholarly journals Torque Ripple Reduction of Switched Reluctance Motor with Non-Uniform Air-Gap and a Rotor Hole

Machines ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 348
Author(s):  
Grace Firsta Lukman ◽  
Jin-Woo Ahn
Keyword(s):  
High Performance ◽  
Switched Reluctance Motor ◽  
Torque Ripple ◽  
Air Gap ◽  
Switched Reluctance ◽  
Torque Ripple Reduction ◽  
Uniform Region ◽  
Reluctance Motor ◽  
Rotor Pole ◽  
Ripple Reduction

A switched reluctance motor has a very simple structure which becomes its key signature and leads to various advantages. However, because of its double saliency and switching principle, the motor is also known to have a relatively high torque ripple, and this hinders its use as a high-performance drive. In this paper, a method to reduce torque ripple while maintaining average torque is introduced. Two elements are used to achieve this, namely, a non-uniform air-gap on the rotor-pole face and one hole in each non-uniform region, which maintains the saturation level of the air-gap. This approach preserves the mechanical simplicity of the motor and is easy to implement. Simulations and experiments were performed to verify the effectiveness of the proposed design.

scholarly journals Optimization method for calculating the geometrical dimensions of the tooth zone of the switched reluctance motor

2020 ◽  
Vol 6 (1) ◽  
pp. 30-47
Author(s):  
Alexander V. Kashuba
Keyword(s):  
Optimization Algorithm ◽  
Switched Reluctance Motor ◽  
Optimization Method ◽  
Torque Ripple ◽  
Transport Systems ◽  
Electromagnetic Torque ◽  
Monte Carlo Optimization ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Geometrical Dimensions

Background: Switched reluctance motor (SRM) is a promising type of electromechanical energy converter. It is used in both motor and generator modes. SRM can be used not only in mechanisms with rotational motion, but also as linear motors, including maglev transport systems. A lot of publications are devoted to SRM design issues. In development of this direction, further improvement of the SRM design process is proposed using the optimization method of forming the geometrical dimensions of the tooth zone. Aim: Reducing of electromagnetic torque ripple SRM by optimizing the geometrical dimensions of the tooth zone. Materials and Methods: To simulate magnetic fields, the FEMM 4.2 program was used. The implementation of the optimization algorithm and the processing of the results of field calculations, was carried out in the MATLAB program. The Monte Carlo optimization methods (they rely on random sampling) was taken as the basis for developing the optimization algorithm, and its improvement was achieved using mathematical methods based on probability theory. Results: As a result of the optimization calculations, the tooth zone geometry was obtained, which provides a reduction in the pulsation of the SRM electromagnetic torque ripple from 122% to 40%. Conclusion: The studies presented in the paper indicate the effectiveness of using the optimization algorithm in designing SRM, as well as the feasibility of removing restrictions on the shape of the tooth SRM and the use of a curved tooth shape, which is determined in the process of solving the optimization problem by a determined criterion.

Flux density calculation of air gap for switched reluctance motor considering magnetic saturation based on sub-domain method

2018 ◽  
Vol 37 (6) ◽  
pp. 2081-2092
Author(s):  
Xianhai Pang ◽  
Haijun Zhang ◽  
Shuhong Wang ◽  
Hao Jing
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Density ◽  
Switched Reluctance Motor ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Magnetic Saturation ◽  
Content Type ◽  
Switched Reluctance ◽  
Reluctance Motor

Purpose The purpose of this paper is to study the saturation and nonlinear performance of magnetic field in the air gap of switched reluctance motor (SRM). Design/methodology/approach The analytical method of sub-domain combined with the saturation compensation method is used to determine the nonlinear distribution of air gap magnetic field in SRM. Also, the resolutions of the two-dimensional (2D) Laplace’s equation and Poisson’s equation in polar coordinates are used to obtain the simplified expression of magnetic flux density. Findings For verifying the effectiveness of analytical model, the results are compared with those obtained from the 2D finite element method (FEM). The influence of magnetic saturation is taken into account by associating the sub-domain analysis result with the nonlinear B-H properties of stator and rotor iron. The magnetic flux density in radial and tangential direction considering the saturation effect may be calculated accurately. It can be seen that one can easily determine the linear analytical results accurately, whereas it is difficult to determine the magnetic flux density with saturation influence; especially at some local positions, there is a larger difference between analytical and FE model due to the complex boundary conditions. Practical implications This paper presents the development and optimization design of high-performance SRM. Originality/value The magnetic saturation may be taken into account for the SRM and analytical models support to simulated system performance.

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