scholarly journals Theoretical and Experimental Research of Synchronous Reluctance Motor

2017 ◽  
Vol 54 (5) ◽  
pp. 38-47 ◽  
Author(s):  
R. Dobriyan ◽  
S. Vitolina ◽  
L. Lavrinovicha ◽  
J. Dirba
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Electromagnetic Torque ◽  
The Finite Element Method ◽  
Magnetomotive Force ◽  
Research On Evaluation ◽  
Stator Windings ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Experimental Values

Abstract The paper presents the research on evaluation of accuracy of magnetic field calculations of synchronous reluctance motor in comparison with the results obtained in experiments. Magnetic field calculations are performed with the finite element method to determine values of the magnetic flux and electromagnetic torque according to the current value in motor stator and load angle between the rotor direct-axis and axis of stator magnetomotive force (MMF). Experimental values of magnetic flux and electromagnetic torque are obtained on motor with locked rotor while equivalent direct current is applied to the stator windings. The research shows that the results obtained from the magnetic field calculations coincide well with the experimental data.

scholarly journals Study of the Synchronous Reluctance Motor Design

2016 ◽  
Vol 53 (4) ◽  
pp. 22-29 ◽  
Author(s):  
J. Dirba ◽  
L. Lavrinovicha ◽  
R. Dobriyan
Keyword(s):  
Magnetic Flux ◽  
Torque Ripple ◽  
Electromagnetic Torque ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Motor Design ◽  
Twofold Decrease ◽  
External Rotor

AbstractThe paper focuses on studying the external-rotor synchronous reluctance motor. The analysis is performed to estimate the influence of the number of stator slots and non-magnetic areas in the rotor (i.e., flux barriers) on the electromagnetic torque and torque ripple of the studied motor. It is concluded that the increase in the number of stator slotsZ= 6 toZ= 18 causes an approximately twofold decrease in the ripple factor, but torque increases by 5 %. Electromagnetic torque will be increased approximately by 24 %, if non-magnetic flux barriers are created in the rotor of the studied synchronous reluctance motor.

scholarly journals Physical and Technical Energy Problems

2013 ◽  
Vol 50 (3) ◽  
pp. 3-11 ◽  
Author(s):  
N. Levin ◽  
V. Pugachev ◽  
J. Dirba ◽  
L. Lavrinovicha
Keyword(s):  
Service Life ◽  
Magnetic Flux ◽  
Low Cost ◽  
Simple Design ◽  
Electromagnetic Torque ◽  
Electric Motors ◽  
Household Appliances ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Production Solutions

The paper presents an overview of brushless electric motors used in hand electric tools and household appliances. Analysis of the motor types has shown that synchronous reluctance motors are the most reliable for lowpower drives of such tools and appliances due to their simple design, long service life and low cost of production. Solutions are proposed for significant decrease in the quadrature-axis magnetic flux of the synchronous reluctance motor. The motors are shown to develop the specific electromagnetic torque up to 0.35÷0.4 Nm/kg.

scholarly journals Design of Low-Torque-Ripple Synchronous Reluctance Motor with External Rotor

2017 ◽  
Vol 54 (1) ◽  
pp. 23-30
Author(s):  
L. Lavrinovicha ◽  
J. Dirba ◽  
R. Dobriyan
Keyword(s):  
Magnetic Field ◽  
Torque Ripple ◽  
Numerical Calculations ◽  
Electromagnetic Torque ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Low Torque ◽  
External Rotor

Abstract The paper presents new designs for synchronous reluctance motors that have external rotor (segment-shaped rotor, rotor with additional non-magnetic space to the quadrature axis of the rotor, and rotor with several flux barriers). Impact of the external rotor configuration on the electromagnetic torque and torque ripple is analysed. Electromagnetic torque ripple factor is calculated for each studied motor using the results of magnetic field numerical calculations.

Basic Statements of Research and Magnetic Field of Axial Excitation Inductor Generator

2011 ◽  
Vol 28 (1) ◽  
pp. 49-52
Author(s):  
Igors Stroganovs ◽  
Andrejs Zviedris
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Flux ◽  
Magnetic System ◽  
System Optimization ◽  
Magnetic Saturation ◽  
The Finite Element Method ◽  
Flux Linkage ◽  
Axial Excitation

Basic Statements of Research and Magnetic Field of Axial Excitation Inductor GeneratorIn this work the main features of axial excitation inductor generators are described. Mathematical simulation of a magnetic field is realized by using the finite element method. The objective of this work is to elucidate how single elements shape, geometric dimensions and magnetic saturation of magnetic system affect the main characteristics of the field (magnetic induction, magnetic flux linkage). The main directions of a magnetic system optimization are specified.

Thermal and Magnetisms Design of an Inductor Using Finite Element Method

2012 ◽  
Vol 622-623 ◽  
pp. 130-135
Author(s):  
K.K. Boo ◽  
Ovinis Mark ◽  
Nagarajan Thirumalaiswamy
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Thermal Stress ◽  
Magnetic Flux ◽  
Thermal Transition ◽  
The Finite Element Method ◽  
Element Method

Thermal stress points in an inductor can cause insulation deterioration and ageing, leading to winding faults, while high magnetic flux causes interference. In this paper, the thermal and magnetic behaviors of inductors with different winding geometries are investigated using the Finite Element Method (FEM) based on 2-Dimension and 3-Dimension model of an inductor. Inductors with different winding geometries have different thermal envelopes and the geometry with the slowest thermal transition has fewer thermal stress points potentially reducing winding faults at the conductor. Furthermore, slow thermal transition would result in greater magnetic field coverage with no magnetic flux outside boundary of the inductor.

scholarly journals Procedure for selecting optimal geometric parameters of the rotor for a traction non-partitioned permanent magnet-assisted synchronous reluctance motor

2021 ◽  
Vol 6 (8 (114)) ◽  
Author(s):  
Borys Liubarskyi ◽  
Dmytro Iakunin ◽  
Oleh Nikonov ◽  
Dmytro Liubarskyi ◽  
Vladyslav Vasenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mathematical Model ◽  
Finite Element ◽  
Permanent Magnets ◽  
Geometrical Parameters ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Electromagnetic Momentum ◽  
Conditional Optimization ◽  
Angle Of Rotation

This paper reports the construction of a mathematical model for determining the electromagnetic momentum of a synchronous reluctance motor with non-partitioned permanent magnets. Underlying it is the calculation of the engine magnetic field using the finite-element method in the flat-parallel problem statement. The model has been implemented in the FEMM finite-element analysis environment. The model makes it possible to determine the engine's electromagnetic momentum for various rotor geometries. The problem of conditional optimization of the synchronous reluctance motor rotor was stated on the basis of the rotor geometric criteria. As an analysis problem, it is proposed to use a mathematical model of the engine's magnetic field. Constraints for geometric and strength indicators have been defined. The Nelder-Mead method was chosen as the optimization technique. The synthesis of geometrical parameters of the synchronous reluctance motor rotor with non-partitioned permanent magnets has been proposed on the basis of solving the problem of conditional optimization. The restrictions that are imposed on optimization parameters have been defined. Based on the study results, the dependence of limiting the angle of rotation of the magnet was established on the basis of strength calculations. According to the calculation results based on the proposed procedure, it is determined that the optimal distance from the interpole axis and the angle of rotation of magnets is at a limit established by the strength of the rotor structure. Based on the calculations, the value of the objective function decreased by 24.4 % (from −847 Nm to −1054 Nm), which makes it possible to significantly increase the electromagnetic momentum only with the help of the optimal arrangement of magnets on the engine rotor. The results of solving the problem of synthesizing the rotor parameters for a trolleybus traction motor helped determine the optimal geometrical parameters for arranging permanent magnets.

Experimental and Theoretical Study on Magnetoelastic Buckling of a Ferromagnetic Cantilevered Beam-Plate

1978 ◽  
Vol 45 (2) ◽  
pp. 355-360 ◽  
Author(s):  
K. Miya ◽  
K. Hara ◽  
K. Someya
Keyword(s):  
Magnetic Field ◽  
Theoretical Study ◽  
Critical Value ◽  
The Finite Element Method ◽  
Wide Face ◽  
Field Distortion ◽  
Cantilevered Beam ◽  
Magnetically Soft Material ◽  
Experimental Values ◽  
The Magnetic Field

When a cantilever of magnetically soft material is inserted with its wide face normal to a uniform magnetic field and the magnetic field is increased to a critical value the cantilever will buckle. The experimental magnetoelastic buckling fields and the theoretical ones differ by a factor of two. A magnetic field distortion near an edge of the specimen is here evaluated based on the finite-element method and the results are applied to the experimental results so as to explain the discrepancy between the experiment and the theory. The corrected experimental values are within 15 percent of the theoretical values. The effect of demagnetization on the buckling field is here demonstrated as well as the effect of specimen dimensions.

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