Готові списки джерел за темами / Ferromagnetic rotor

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Добірка наукової літератури з теми "Ferromagnetic rotor"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Ferromagnetic rotor"

Zablodskiy, M. M., V. E. Pliuhin, S. I. Kovalchuk, and V. O. Tietieriev. "Indirect field-oriented control of twin-screw electromechanical hydrolyzer." Electrical Engineering & Electromechanics, no. 1 (February 17, 2022): 3–11. http://dx.doi.org/10.20998/2074-272x.2022.1.01.

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Goal. Development of a mathematical model of indirect field-oriented control of a twin-screw electromechanical hydrolyzer. Methodology. The paper presents a mathematical model of Indirect field-oriented control of twin-screw electromechanical hydrolyzer. The mathematical model was developed in the MATLAB / Simulink software environment. The determination of the main parameters of a twin-screw electromechanical hydrolyzer was carried out by developing a finite element model in the Comsol Multiphysics software environment. Results. Based on the results of a mathematical study, graphical dependences of the distribution of magnetic induction in the air gap of a ferromagnetic rotor, a spatial representation of the distribution of magnetic induction on a 3D model of a ferromagnetic rotor of a twin-screw electromechanical hydrolyzer were obtained. The results of finite element modeling were confirmed by a practical study of a mock-up of a ferromagnetic rotor of a twin-screw electromechanical hydrolyzer. By implementing the MATLAB / Simulink model, graphical dependences of the parameters of the ferromagnetic rotor of a twin-screw electromechanical hydrolyzer are obtained under the condition of a stepwise change in the torque and a cyclic change in the angular velocity. Originality. The paper presents an implementation of the method of indirect field-oriented control for controlling the ferromagnetic rotor of a twin-screw electromechanical hydrolyzer. The work takes into account the complex design of the ferromagnetic rotor of a twin-screw electromechanical hydrolyzer. Practical significance. The practical implementation of the results of mathematical modeling makes it possible to achieve effective control of a complex electromechanical system, allows further research to maintain the necessary parameters of the technological process and to develop more complex intelligent control systems in the future.

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SYTIN, A. V., А. А. KIRICHEK, N. V. TOKMAKOV, and O. V. YAKOVLENKO. "CALCULATION OF FLOOR BEARING WITH FERROMAGNETIC LIQUID OF TURBOGENERATORS OF POWER DISTRIBUTION SYSTEMS." Fundamental and Applied Problems of Engineering and Technology 3 (2021): 153–60. http://dx.doi.org/10.33979/2073-7408-2021-347-3-153-160.

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The article discusses ways to solve the problem of wear of the rotor bearings of turbine units at the moments of start–up and shutdown. The concept of a new type of elastic–damping combined sliding bearings, which combines the use of ferromagnetic fluids in the design of multi–blade bearings, is proposed. On the basis of this, a design of a petal bearing with an electromagnetic effect on elastic elements and a ferromagnetic lubricant has been proposed. The properties and features of the use of ferromagnetic fluids in precision engineering as a lubricant are described. A mathematical model of an electromagnetic petal bearing with a ferromagnetic fluid is proposed on the basis of the Reynolds equation from the course of magnetohydrodynamics, Maxwell's equations for a magnetic field, a system of equations in displacements based on the theory of cylindrical shells. An algorithm for the operation of the rotor support during start–up, shutdown, as well as when the power supply of the electromagnets is turned off.

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Шамин, Евгений, Evgeniy Shamin, Булат Зиганшин, Bulat Ziganshin, Галина Новикова, and Galina Novikova. "DEVELOPMENT OF MICROWAVE DRYERS FOR FUR MATERIALS." Vestnik of Kazan State Agrarian University 12, no. 3 (January 11, 2018): 86–90. http://dx.doi.org/10.12737/article_5a1d9b2ce8e734.23195358.

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Abstract. The developed plant belongs to drying equipment and can be used in farms for drying and disinfecting skins of rabbits, nutria, mink, fox, Arctic fox, sable, otter, muskrat, etc. A microwave dryer of a fur raw material of the rotor type comprises a cylindrical shielding element 1, inside of which a cylindrical non-ferromagnetic drum 9 is coaxially disposed, perforated non-ferromagnetic plates are welded to the shell, forming compartments. The drum 9 with the compartments represents the rotor 2, and the compartments serve as the mobile resonators 3. The average perimeter of the annular space between the shielding unit 1 and the drum 9 is equal to a multiple of half the wave length. The rotor 2 rotates from the electric motor 4, installed under the lower base of the shielding uni 1, containing the discharge nozzle 6. The depth of the compartments along the vertical is greater than the width of the bottom base of the trapezoidal radio-transparent rule, and the radial depth of the compartments is greater than the height of the rule. On the upper base of the shielding unit 1, containing the loading branch pipe 7, there are mounted microwave generators 8 and an exhaust fan 10. The branches function as transverse waveguides.

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Khan, M. R., I. Husain, and M. F. Momen. "Lightly Ferromagnetic Rotor Bars for Three-Phase Squirrel-Cage Induction Machines." IEEE Transactions on Industry Applications 40, no. 6 (November 2004): 1536–40. http://dx.doi.org/10.1109/tia.2004.836226.

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SMIRNOV, Alexsander Yu, Yekaterina N. ALEKSANDROVA, and Andrey Yu ZIMIN. "Refining the Torque Calculation Models in Designing Salient-Pole Inductor Motors." Elektrichestvo 11, no. 11 (2020): 53–59. http://dx.doi.org/10.24160/0013-5380-2020-11-53-59.

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The article suggests a procedure for designing salient-pole inductor motors with developed tooth structures on the rotor and stator, which is supplemented by nonlinear calculation of a fragmentary magnetic circuit model with subsequently refining the saturation coefficient. The calculation is carried out using the semigraphical method before and after displacement of the rotor from the position of maximum air gap permeance by half the rotor tooth division with respect to teeth on the stator pole extension. Owing to introducing a weakly branched nonlinear magnetic circuit model into the design algorithm, in became possible to elaborate detail designs of motors for important electric drives of automatic systems, which confirmed their declared characteristics. It is noted that demagnetization of the magnetic circuit ferromagnetic areas, which is determined by calculation on the nonlinear model after turning the rotor by half the tooth division from the coaxial position, is the criterion of the correctly selected tooth area geometric parameters and electromagnetic loads.

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Iskierka, Sławomir. "Finite element analysis of the performance of a ferromagnetic solid-rotor motor." Finite Elements in Analysis and Design 11, no. 1 (May 1992): 1–8. http://dx.doi.org/10.1016/0168-874x(92)90024-7.

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Jiang, Weilun, Gaopei Pan, Yuzhi Liu, and Zi-Yang Meng. "Solving quantum rotor model with different Monte Carlo techniques." Chinese Physics B 31, no. 4 (April 1, 2022): 040504. http://dx.doi.org/10.1088/1674-1056/ac4f52.

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Анотація:

We systematically test the performance of several Monte Carlo update schemes for the (2 + 1)d XY phase transition of quantum rotor model. By comparing the local Metropolis (LM), LM plus over-relaxation (OR), Wolff-cluster (WC), hybrid Monte Carlo (HM), hybrid Monte Carlo with Fourier acceleration (FA) schemes, it is clear that among the five different update schemes, at the quantum critical point, the WC and FA schemes acquire the smallest autocorrelation time and cost the least amount of CPU hours in achieving the same level of relative error, and FA enjoys a further advantage of easily implementable for more complicated interactions such as the long-range ones. These results bestow one with the necessary knowledge of extending the quantum rotor model, which plays the role of ferromagnetic/antiferromagnetic critical bosons or Z 2 topological order, to more realistic and yet challenging models such as Fermi surface Yukawa-coupled to quantum rotor models.

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Yang, Chao Jun, Dan Lu, You Hu, Xiao Ping Chen, Ru Yu Ma, and Ling Ying Kong. "Magnetic-Field Modulation Principle and Transmission Ratio Calculation of Field-Modulated Asynchronous Magnetic Coupling." Applied Mechanics and Materials 535 (February 2014): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amm.535.48.

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A field-modulated asynchronous magnetic coupling is a new type of composite magnetic transmission mechanism, which is based on the principles of magnetic field modulation and electromagnetic induction. The rotational velocity and direction of the inner conductor rotor could be changed, since the magnetic field generated by permanent magnet outer rotor is modulated by ferromagnetic pole-pieces. Therefore, the couplings can meet special conditions with special requirements for load and speed. The formula of the modulated magnetic flux density of inner air gap is analyzed through magnetic field analytic approaches, and then the formula of transmission ratio is also deduced by introducing slip ratio in the mean time. Finally, experimental research of the coupling is conducted. The results show that the transmission ratio of the coupling is not only related to the ratio of the number of pole pairs on outer permanent magnet rotor and the number of pole pairs of magnetic field flux density harmonic, but also related to the slip ratio. Besides, the transmission ratio of the coupling increases non-linearly with the slip ratio.

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Meyer, Alexander, and Jörg Franke. "Towards an Energy Efficient Series Production of High Performance Permanent Magnet Synchronous Motors by Selective Magnet Assembly." Applied Mechanics and Materials 882 (July 2018): 111–18. http://dx.doi.org/10.4028/www.scientific.net/amm.882.111.

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Анотація:

When installing magnets on synchronous rotors, the target values of energy efficiency, vibration, noise emissions, power density and synchronism are decisively influenced by the quality of the rotor magnetic field. This depends on the real position of the magnets after mounting, on the polarization of the magnet and on the direction of magnetisation. However, large component tolerances in the magnet bodies also require tolerances in the rotor magnetic field. The quality assurance in the field of rotor production, which is largely lacking in the current state of the art, is compensated for by robust motor designs in order to keep the rejects low. Unconventional machine designs, such as the Halbach arrangement of the magnets, exploit optimization potential in terms of power density by eliminating the ferromagnetic component in the rotor and reduce harmonics due to the almost sinusoidal field shape, so that more efficient winding processes, such as linear winding in the stator with a constant low torque ripple compared to distributed winding, are used. At the same time, however, the requirement for homogeneity of the magnetic field increases due to the matching pairing of the magnets and the correct magnetic position when using sintered, isotropic rare earth magnets. By 100 % testing of magnets and rotors, it is possible on the one hand to exploit these design potentials and on the other hand to estimate the performance data of the motor before the final assembly test by means of data mining. In the framework of the E|MagTol project, the process feasibility of a logistics solution for storing magnetized goods has already been successfully investigated. In order to extend the potential uncovered in the previous project, it is necessary to record all process data of the rotor assembly process such as magnet geometry, magnet position, polarization and magnetization direction. The aim of E|S2MART is on the one hand to increase machine efficiency by compensating for component deviations by adapting or matching the magnetic position and magnetic parameters in a closed-loop control loop in the assembly process and on the other hand to significantly increase the energy efficiency of the assembly process. This is done by optimizing the magnetization process and coupling with inductive heating to replace the furnace process during the bonding process and to reduce the energy consumption during magnetization. On the basis of the existing process experience, the savings potential in the assembly process is estimated to be at least 70 % compared to conventional processes.

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von Pfingsten, Georg, Martin Marco Nell, and Kay Hameyer. "Hybrid simulation approaches for induction machine calculation." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (September 3, 2018): 1744–54. http://dx.doi.org/10.1108/compel-01-2018-0015.

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Purpose Induction machines for traction applications are operated at working points of high ferromagnetic saturation. Depending on the working point, a broad spectrum of harmonic frequencies appears in the magnetic flux density of induction machines. Detailed loss analysis therefore requires local and temporal highly resolved nonlinear field computation. This loss analysis can be performed in the post processing of nonlinear transient finite element simulations of the magnetic circuit. However, it takes a large number of transient simulation time steps to build up the rotor flux of the machine. Design/methodology/approach In this paper, hybrid simulation approaches that couple static FEA, transient FEA and analytic formulations to significantly decrease the number of simulation time steps to calculate the magnetic field in steady state are discussed, analyzed and compared. Findings The proposed hybrid simulation approaches drastically decrease the simulation time by shortening the transient build-up of the rotor flux. Depending on the maximum error of the rotor flux linkage amplitude compared to the steady state value, a reduction of simulation time steps in the range of 55.5 to 98 per cent is found. Originality/value The presented hybrid simulation approaches allow efficient performing of the transient FE magnetic field simulations of induction machines operated as traction drives.

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Більше джерел

Дисертації з теми "Ferromagnetic rotor"

Zablodskiy, Nikolai, and V. Pliugin. "3D magnetic filed distribution in a screw double-stator induction motor." Thesis, Lviv Polytechnic National University, 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/25052.

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Тези доповідей конференцій з теми "Ferromagnetic rotor"

Lavrinovicha, Ludmila, Uldis Brakanskis, and Janis Dirba. "Synchronous reluctance motor without rotor ferromagnetic yoke." In IEEE EUROCON 2013. IEEE, 2013. http://dx.doi.org/10.1109/eurocon.2013.6625106.

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Nikolaj, Zablodskij, Pliugin Vladyslav, Fligl Stanislav, and Lettl Jiri. "Dynamic simulation of the double-stator induction electromechanical converter with ferromagnetic rotor." In 2013 IV International Conference on Power Engineering, Energy and Electrical Drives (POWERENG). IEEE, 2013. http://dx.doi.org/10.1109/powereng.2013.6635828.

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Heikkinen, Janne E., and Siavash Pakdelian. "Rotordynamics of a Trans-Rotary Magnetic Gear Rotor." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63813.

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Trans-Rotary Magnetic Gear (TROMAG) has recently been introduced as a reliable and efficient way of converting low-speed, high-force translation into high-speed, low-torque rotation, or vice versa. The gear can be used in any high force linear motion application; specifically, it would be a strong contender for wave energy harvesting. The TROMAG consists of two main parts: a rotor and a translator, both of which are formed by furnishing tubular ferromagnetic iron cores with helically-disposed permanent magnets. In this paper, the dynamics of the rotor is studied by employing the Finite Element Method (FEM) and using a simplified model where a flexible rotor is spinning on the flexible isotropic bearings. The rotor system has non-idealities that may excite the system to vibrate. In addition, the non-idealities in geometry cause uneven magnetic pulling force that is considered as an external force. The transient response of the rotor-bearing system is studied by varying the eccentricity of the rotor with respect to the translator. The vibration characteristics of the rotor-bearing system of the TROMAG are evaluated and presented in this paper.

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Firdaus, R. N., M. Norhisam, N. Mariun, I. Aris, M. Nirei, and H. Wakiwaka. "Comparison of the torque characteristics of ferromagnetic rotor double stator brushless DC permanent magnet motor." In 2012 IEEE International Conference on Power and Energy (PECon). IEEE, 2012. http://dx.doi.org/10.1109/pecon.2012.6450247.

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Krishnasamy, Jay, and Jairo Moura. "Modeling of the Axial and Tilt Stiffness Between a Magnet Track and a Ferromagnetic Backing." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42329.

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Анотація:

This paper consists of modeling and analysis of the axial and radial forces as well as axial and tilt stiffness between a magnetic track and a ferromagnetic backing. The proposed model utilizes the concept of Maxwell stress tensor and simplified reluctance models in order to predict the magnetic interactions between the rotor and the stator. In other to verify the model developed, finite element models and experiments are performed for the case of a linear magnetic track. The results can be applied to the case of rotary tracks without loss of generality. Applications of this work can be used in the design of magnetic bearings or servo motors with ferromagnetic stators.

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Zhao, Haisen, Chengyang Chu, Hassan H. Eldeeb, Yang Zhan, Guorui Xu, and Osama A. Mohammed. "Optimal Design of High-speed Solid Rotor Cage Induction Motors Considering Ferromagnetic Materials Behavior and Manufacturing Process." In 2019 IEEE Industry Applications Society Annual Meeting. IEEE, 2019. http://dx.doi.org/10.1109/ias.2019.8912422.

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Gao, Jianmin, Xiaomei Zhu, Ray McCafferty, and Nigel Leighton. "A Generalized Nonlinear Model for Active Magnetic Bearings." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0291.

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Abstract This paper describes a generalized nonlinear model of active magnetic bearings, for arbitrary number, size and position of pole-pairs, including the coordinate coupling between the vertical and horizontal directions, the nonlinearility of the power amplifier and the effect of finite permeability of the ferromagnetic bearing material. As an example, a practical magnetic bearing with four pole-pairs is examined. The predicted force from the model is quite consistent with experimental results. For the PD controller implemented for a horizontal rotor, the expectation of the equilibrium of the rotor also agrees quite well with the measurement.

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Modaresahmadi, Sina, Javad Khalesi, Joshua Kadel, and Wesley Williams. "Thermal Analysis of a Subscale Flux Focusing Magnetic Gearbox." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86876.

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Magnetic gears are non-contact means of torque transmission which utilize the interaction of magnetic fields in place of the meshing teeth of mechanical gears to achieve a change in rotational speed and scale up/down the torque. A subscale magnetic gearbox featured a radial flux focusing arrangement consisting of three main rotors in the active region called inner, cage and outer rotors. In this arrangement, ferromagnetic cage rotor poles modulate flux between the inner rotor and outer rotor permanent magnets to achieve the gear reduction. Replacing the solid metal bars with laminated stacks for the cage modulating pieces as well as retaining pieces of the inner and outer rotor magnets reduces eddy current losses in the axial direction, a main source of losses in magnetic gears, while preserving the magnetic flux directed in the radial direction. Both of these features are key for overall system performance. Given the potential of demagnetization of the permanent magnets and damage to the components at high temperature, multiphysics thermal analysis is conducted on a subscale flux focusing magnetic gearbox to predict temperature distribution and thermal stresses. A conjugate heat transfer (CHT) method is used in a 3D academic code, FLUENT, to predict heat flux and the coupled non-adiabatic external flow field and temperature field on the inner, cage and outer rotor with a Finite Volume Method (FVM). Thermo-elastic behavior of the laminated components are assigned through anisotropic materialistic characters in a finite element method (FEM), where the thermal and centrifugal stresses are calculated.

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Habermann, Helmut, and Maurice Brunet. "The Active Magnetic Bearing Enables Optimum Control of Machine Vibrations." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-221.

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Анотація:

The active magnetic bearing is based on the use of forces created by a magnetic field to levitate the rotor without mechanical contact between the stationary and moving parts. A ferromagnetic ring fixed on the rotor “floats” in the magnetic field generated by the electromagnets, which are mounted as two sets of opposing pairs. The current is transmitted to the electromagnetic coils through amplifiers. The four electromagnets control the rotor’s position in response to the signals transmitted from the sensors. The rotor is maintained in equilibrium under the control of the electromagnetic forces. Its position is determined by means of sensors which continuously monitor any displacements between rotor and stator through an electronic control system. As in every control system, damping of the loop is provided by means of a phase advance command from one or more differenciating circuits of the position error signal. The vibrations of the rotor and stator of a machine are generated by different forces: - centrifugal forces due to the misalignment between the geometrical axis and the inertial axis of the rotor (unbalance), - reaction forces due to aerodynamical forces on the rotor and stator blades. The active magnetic bearing allows the decrease and in many cases the fully cancelling of effects of these forces i.e. the vibrations of the machine. The inertial forces can be cancelled by shifting the axis of rotation of the rotor from the geometrical axis to the inertial axis (this system is usually called automatic balancing). The reaction forces due to aerodynamical effects can be cancelled by the creation by the magnetic bearings of forces in opposition. The vibrations are measured on the stator by accelerometers, and the signals drive magnetic bearings which generate forces having the same amplitude but in phase opposition. The improvement in vibrations amplitude usually ranges from 20 Db to 40 Db over a large band of frequencies.

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Potapov, L. A., G. A. Fedyaeva, and T. V. Smorudova. "Modeling electromagnetic processes in electromagnetic brakes and slip clutches with hollow ferromagnetic rotors." In 2016 2nd International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). IEEE, 2016. http://dx.doi.org/10.1109/icieam.2016.7911643.

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