A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects

Heidari, Hamidreza; Rassõlkin, Anton; Razzaghi, Arash; Vaimann, Toomas; Kallaste, Ants; Andriushchenko, Ekaterina; Belahcen, Anouar; Lukichev, Dmitry V.

doi:10.3390/electronics10080933

Cited by 9 publications

(6 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various factors are taken into account [3], among which:  design features of the investigated LIM: SLIM [15, 21,32], DLIM [27], cross-shaped LIM [6,33], solid rotor [34] and others, transverse edge shape of secondary aluminum plate and its temperature secondary part without slit structure [35], etc. ;  presence of transverse and longitudinal edge effects [18,26];  skin effect [28].…”

Section: Equivalent Circuit Models Of Linear Induction Motorsmentioning

confidence: 99%

Method of Cylindrical Linear Induction Motor Equivalent Circuit Parameters Determination and Performance Calculation Algorithm

Okhrimenko,

Zbіtnieva,

Glebova

et al. 2022

LEPE

View full text Add to dashboard Cite

Cylindrical linear induction motors (LIM) are currently used in many industrial applications. Task of modeling of electrical machine is of great importance for optimization of processes of design and manufacture of engines with optimal technical characteristics. Traditional approach of construction of mathematical models of asynchronous machines based on classical theory of electrical machines, in comparison with methods of field theory and numerical methods, is much simpler. Structurally cylindrical LIM are distinguished by the absence of transverse edge effects, which contributes to the use of the methods of the classical theory of electrical machines for construction of their mathematical models. In this paper proposes an analytical method of calculation of parameters of equivalent circuit and operating characteristics of cylindrical LIM. In work engine was studied, movable part of which is made in the form of solid steel bar with a copper coating. Equivalent circuits of linear induction motors of various designs (one-sided, two-sided, cruciform, cylindrical) are considered, and assessment of the possibility of their application for research motor is made. Work of cylindrical LIM on industrial mechanisms is characterized by relatively small value of working stroke. For such engines, it is difficult to carry out standard tests, in particular idle stroke test, in order to obtain data for calculation of parameters of the equivalent circuit. The paper proposes a method of experimental determination of parameters of the equivalent circuit. Stator active resistance is measured at direct current, and stator reactance is measured using out-of-rotor method. The remaining parameters of equivalent circuit are calculated according to short circuit experience and engine work mode without load (is taken as an idle stroke experience). It is shown that exact G-shaped equivalent circuit, when calculation of parameters of which active and reactive components of correction factor and active resistance of magnetization branch are taken into account, provides acceptable accuracy in determination of values of equivalent circuit parameters. Algorithm of calculation of work characteristics of cylindrical LAM based on equivalent circuit data is presented. Comparison of calculated and experimental data showed satisfactory results, error is not more than 7%. A new model for decomposition of the total power losses, which includes four components is proposed. Each of the components of the proposed model has a certain physical meaning due to the nature of electromagnetic processes in a three-phase four-wire system. Definitions to describe each of the proposed components are formulated. It is shown that each of supplementary components of the total loss power is proportional to the minimum possible loss power and to the square of the RMS value of the power, which is caused by its occurrence in three-phase four-wire power supply system, and it is inversely proportional to the mean square of the net power loss. The synthesized Matlab-model for verification of the four-component structure of power losses showed a high degree of its adequacy. The proposed model allows us to rethink the description of power losses in three-phase AC circuits and can be used in specialized measuring instruments for electrical networks monitoring. Using the information obtained in the monitoring process, it is possible to plan technical measures to reduce losses of electrical energy in the power supply system, as well as to estimate the capital costs of these measures.

show abstract

Section: Equivalent Circuit Models Of Linear Induction Motorsmentioning

confidence: 99%

Method of Cylindrical Linear Induction Motor Equivalent Circuit Parameters Determination and Performance Calculation Algorithm

Okhrimenko,

Zbіtnieva,

Glebova

et al. 2022

LEPE

View full text Add to dashboard Cite

show abstract

“…Electronics 2022, 11, x FOR PEER REVIEW while the proportion of new data is too small [14]. When there are model errors culation errors in the system, the effect of new observation data on state estimatio small to effectively suppress the influence of errors on state estimation, resultin tortion of the covariance matrix and a divergence of filtering [15][16][17].…”

Section: Pmlsm Mathematical Modelmentioning

confidence: 99%

“…The research shows that the EKF linearizes the estimated state vector at each sampling time. As K gets bigger, the ratio of historical data in the filtered value is too large, while the proportion of new data is too small [14]. When there are model errors and calculation errors in the system, the effect of new observation data on state estimation is too small to effectively suppress the influence of errors on state estimation, resulting in distortion of the covariance matrix and a divergence of filtering [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Speed Estimation Method of Linear Motor Extended Kalman Filter Based on Attenuation Memory

Zhang

Sun

et al. 2022

Electronics

View full text Add to dashboard Cite

In allusion to the phenomenon that the extended Kalman filter is easy to diverge in the mover position estimation of permanent magnet synchronous linear motor, a linear motor extended Kalman filter speed estimation method based on attenuation memory is designed. By setting the attenuation factor, α, the extended Kalman filter is introduced to increase the weight of the latest speed data and restrain the divergence of the filter, so as to achieve a better speed tracking effect. In the simulation experiment of the sensorless control of a linear motor, the AMEKF algorithm can significantly improve the speed estimation accuracy of standard EKF, and the speed estimation error is reduced by 0.75%. At the same time, it still maintains a good speed tracking effect and good dynamic performance under variable speed and different load conditions.

show abstract

“…The EC proposed in this paper is based on the T-Type equivalent circuit commented in [13,14]. In [15], EC based on a Quasi-Two-Dimensional vertical analytical model for the case of a double-sided LIM, both in dynamic and steady state, was developed. This model will be modified to include the intrinsic characteristics of the open-air gap structure presented in the LIMs.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Different Transverse Flux Linear Induction Motor Models to Improve the Performance of the Main Magnetic Circuit

Domínguez,

Duro,

Gaudioso

2024

Machines

View full text Add to dashboard Cite

This paper delves into the knowledge of transverse flux linear induction motors using three-dimensional finite element simulation tools. Original linear induction motors have a useful magnetic flux perpendicular to the movement. We propose some geometric changes to improve the main magnetic circuit of the machine and to ensure simultaneous operation between longitudinal and transverse magnetic fluxes. To obtain the main parameters of the equivalent electrical circuit in a steady state, we propose two steps. Firstly, replicate the classic indirect tests used in rotating machines. This represents a significant advantage since it allows several models to be experimentally tested to obtain the values of electrical parameters. Secondly, use the data from these tests to solve a particular system of equations using numerical methods. The solution provides the electrical elements necessary to generate the equivalent circuit proposed by the authors. A quantitative analysis of the main electrical parameters is also carried out, confirming the advantages of the changes introduced. With them, a significant improvement in thrust force is obtained, especially in stationary conditions and low speeds. Finally, we study, in detail, a set of specific phenomena of linear machines using two parameters: the secondary equivalent air gap and the secondary equivalent conductivity.

show abstract

A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects

Cited by 9 publications

References 29 publications

Method of Cylindrical Linear Induction Motor Equivalent Circuit Parameters Determination and Performance Calculation Algorithm

Method of Cylindrical Linear Induction Motor Equivalent Circuit Parameters Determination and Performance Calculation Algorithm

Speed Estimation Method of Linear Motor Extended Kalman Filter Based on Attenuation Memory

Finite Element Analysis of Different Transverse Flux Linear Induction Motor Models to Improve the Performance of the Main Magnetic Circuit

Contact Info

Product

Resources

About