Characteristic Analysis of Vernier Motor with Permanent Magnets in Stator Core

This paper presents torque characteristic analysis of synchronous induction motors called “IM/PM hybrid motors” by using the two-dimensional finite element method taking terminal voltage into account. The slip characteristics are analyzed by using multi-meshes corresponding to each rotor position, because the transient numerical analysis is quite difficult due to slip even two-dimensional analysis. There are many researches on IM/PM hybrid motors, however the torque characteristics when they are operating as an induction motor have not yet examined sufficiently. In this paper, we tried to explore how to improve the torque characteristics even operating as an induction motor by incorporating the embedded permanent magnets. The results show that the arrangement of the permanent magnets is very important to improve whole torque characteristics.

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An Electromagnetic Moment in Short Circuits in Electrical Rotating Machines with High-Coercivity Permanent Magnets

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v7.i2.pp483-491 ◽

2017 ◽

Vol 7 (2) ◽

pp. 483 ◽

Cited By ~ 1

Author(s):

Flyur Ismagilov ◽

Irek Khayrullin ◽

Vyacheslav Vavilov ◽

Valentina Ayguzina

Keyword(s):

Computer Model ◽

Permanent Magnets ◽

Short Circuit ◽

High Coercivity ◽

Magnetic Flux Density ◽

Simulation Data ◽

Stator Core ◽

Rotating Machine ◽

Electromagnetic Moment ◽

Short Circuits

<p>This paper presents a computer model of an electrical rotating machine with high-coercivity permanent magnets and research of various short-circuit types in the electrical rotating machine with high-coercivity permanent magnets, including turn-to-turn short circuit. Diagnostic criteria of short circuits are revealed. There are the electromagnetic moment and the magnetic flux density in the stator core back. With comparison the experiment and computer modeling results, it was found that the created computer model is highly accurate and completely repeats the experiment results. The numerical discrepancy between the experimental data and the simulation data is below 5%. The obtained results can be used in practice in the design of the electrical rotating machine with high-coercivity permanent magnets.</p>

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Torque Characteristic Analysis of a Transverse Flux Motor Using a Combined-Type Stator Core

Applied Sciences ◽

10.3390/app6110342 ◽

2016 ◽

Vol 6 (11) ◽

pp. 342 ◽

Cited By ~ 7

Author(s):

Xiaobao Yang ◽

Baoquan Kou ◽

Jun Luo ◽

Yiheng Zhou ◽

Feng Xing

Keyword(s):

Characteristic Analysis ◽

Stator Core ◽

Transverse Flux

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Construction of a New Type of Modular Tubular Machine

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.8-9.437 ◽

2013 ◽

Vol 8-9 ◽

pp. 437-444

Author(s):

Dan Cristian Popa ◽

Vasile Ioan Gliga ◽

Lorand Szabo

Keyword(s):

Composite Material ◽

Permanent Magnets ◽

Experimental Tests ◽

Magnetic Composite ◽

Modular Construction ◽

Soft Magnetic ◽

Electromagnetic Excitation ◽

Stator Core ◽

Soft Magnetic Composite ◽

New Type

A new type of tubular machine in modular construction that can work either like motor or generator is presented in the paper. It belongs to the transverse flux machines class and operates based on the variable reluctance principle. Two topologies of the machine, with and without permanent magnets (PM), are approached here. A prototype of the tubular machine with electromagnetic excitation, having a stator core built from laminated sheets and the mover core made of soft magnetic composite material, was built and is shown in the paper. The use of the new soft magnetic composite material, Somaloy 700 HR, having 3D magnetic isotropy, brings important advantages in building the structure. The innovative construction, implying the alternation of the magnetic pieces called modules with no-magnetic spacers, has very good performances. A prototype of this machine was built and a test bench equipped with control and monitoring devices in order to perform experimental tests. Some possible applications showing the potential of the proposed machine are also presented.

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Design and Analysis of a Magnetic QZS Vibration Isolator

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.470.484 ◽

2013 ◽

Vol 470 ◽

pp. 484-488 ◽

Cited By ~ 2

Author(s):

Hui Li ◽

Jing Zhang

Keyword(s):

Dynamic Analysis ◽

Permanent Magnet ◽

Permanent Magnets ◽

Approximate Expression ◽

Repulsive Force ◽

Vibration Isolator ◽

Coil Spring ◽

Characteristic Analysis ◽

Unique Relationship

In this paper, a novel nonlinear magnetic vibration isolator is developed. The developed isolators possess the characteristic of quasi-zero stiffness (QZS). It is obtained by connecting a vertical coil spring with two permanent magnet springs in couple with three permanent magnets. Firstly, the permanent magnet spring is introduced, and approximate expression of repulsive force in the permanent magnet spring is proposed. Secondly, characteristic analysis of system is investigated. It is shown that there is a unique relationship between the stiffness of vertical spring and parameters of system that yields a QZS system. The approximate stiffness of QZS system can be used instead of the analytical stiffness in dynamic analysis.

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Method of winch drive permanent magnet inverted motor design

Vestnik IGEU ◽

10.17588/2072-2672.2019.2.051-058 ◽

2019 ◽

pp. 51-58

Author(s):

M.V. Sakharov ◽

V.N. Karaulov

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Thermal State ◽

Supply Voltage ◽

Cooling System ◽

Technical Specification ◽

Synchronous Machines ◽

Stator Core ◽

Design Project ◽

Technical Specifications

Designing a permanent magnet synchronous motor (PMSM) of a winch drive needs to take into account the features of this machine. The engine has an inverted design with limited dimensions, is powered by a fre-quency converter, runs at the nominal power frequency and nominal load without using the damping winding and frequency start, and provides the required range of rope winding speeds. There is no specialized engi-neering design methodology for the winch drive PMSM. It is required to make changes and additions to the existing methods of designing synchronous machines when solving the problem of designing a winch drive PMSM. Design and validation calculations were performed in the Mathcad environment based on the tech-nique of designing machines with V.A. Balagurov’s permanent magnets and methods of designing general-purpose industrial synchronous machines with electromagnetic excitation. Field models of PMSM were used for modelling electromechanical processes and thermal status. The developed technique of designing the winch drive permanent magnet inverted motor is different from the known methods and due to this allows accounting for the design features of PMSM in the calculation of the size of the machine, the magnets, the stator core, the choice of electromagnetic loads, the design of the stator winding, the choice of the cooling system and the steel grade of the stator core. The specific requirements of the technical specification are taken into account when calculating the number of poles and the frequency of the supply voltage. A design project of the inverted PMSM of the winch drive has been developed. And the paper presents the design and verification calculations results. The reliability of the results was checked by field modeling of electromechanical processes and the thermal state of the PMSM. The study has solved the problem of no specialized engineering design techniques of the winch drive PMSM. The technique can be used by electromechanical engineers in solving the problem of designing winch drive PMSM as it allows making a design project of the PMSM corresponding to the requirements of the technical specifications and operation feature.

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