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Добірка наукової літератури з теми "Coil armature"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Coil armature"

Liu, Peng, Liyun Fan, Qaisar Hayat, De Xu, Xiuzhen Ma, and Enzhe Song. "Research on Key Factors and Their Interaction Effects of Electromagnetic Force of High-Speed Solenoid Valve." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/567242.

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Analysis consisting of numerical simulations along with lab experiments of interaction effects between key parameters on the electromagnetic force based on response surface methodology (RSM) has been also proposed to optimize the design of high-speed solenoid valve (HSV) and improve its performance. Numerical simulation model of HSV has been developed in Ansoft Maxwell environment and its accuracy has been validated through lab experiments. Effect of change of core structure, coil structure, armature structure, working air gap, and drive current on the electromagnetic force of HSV has been analyzed through simulation model and influence rules of various parameters on the electromagnetic force have been established. The response surface model of the electromagnetic force has been utilized to analyze the interaction effect between major parameters. It has been concluded that six interaction factors including working air gap with armature radius, drive current with armature thickness, coil turns with side pole radius, armature thickness with its radius, armature thickness with side pole radius, and armature radius with side pole radius have significant influence on the electromagnetic force. Optimal match values between coil turns and side pole radius; armature thickness and side pole radius; and armature radius and side pole radius have also been determined.

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Zheng, Fangzheng, Runxiang Jiang, Mengkun Lu, Hanning Qian, and Feihong Yue. "Study on the influence of different thickness of armature structure on the emission performance of electromagnetic induction coil launcher." Journal of Physics: Conference Series 2247, no. 1 (April 1, 2022): 012025. http://dx.doi.org/10.1088/1742-6596/2247/1/012025.

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Abstract In the armature structure of traditional electromagnetic induction coil launcher, the armature tail melted due to heat accumulation. In this paper, three new armature structures are proposed. Based on the finite element software maxwell2D, the single-stage electromagnetic induction coil launcher, model is established. The performance indexes of traditional and new armature structures are compared, and the influence of the thickness of traditional armature structure and the side thickness of new structure on temperature rise and electromagnetic performance is studied. On the basis of Maxwell-thermal finite element, the correctness of the temperature field conclusion is verified. The simulation results show that the traditional armature structure has the optimal thickness and the armature performance remains unchanged when the weight ratio and the mechanical strength of the armature are considered. Structure 3 and Structure 4 of the new structure significantly improve the temperature rise of the armature and enhance its emission performance. Due to the eddy current, the optimum side thickness of the new structure 3 and structure 4 is slightly larger than 1/2 of the armature length.

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Liao, Ping, Su Yang Ma, Jing Feng Mao, Guo Qing Wu, and An Dong Jiang. "Fault-Tolerant Permanent Magnet Synchronous Linear Motor." Advanced Materials Research 201-203 (February 2011): 1181–87. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1181.

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The principle and characteristics of Fault-tolerant Permanent Magnet Synchronous Linear Motor are introduced. The design or computational method of the polar distance of concentrated winding coil, the armature parameters, the armature winding parameters, the coil diameter, the distance from the adjacent armature windings are given. The magnetic thrust equation is derived, and the core issues are analyzed. It provided theoretical basis for structural optimization of the Fault-tolerant Permanent Magnet Synchronous Linear Motor.

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Sulaiman, Erwan, Hassan Ali, Mubin Aizat, and Zhafir Aizat. "Improved Design of Three Phase Hybrid Excitation Flux Switching Motor with Segmental Rotor." Applied Mechanics and Materials 785 (August 2015): 295–99. http://dx.doi.org/10.4028/www.scientific.net/amm.785.295.

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This paper presents the new design of Hybrid Excitation Flux Switching Motor (HEFSM) using segmental rotor structure. HEFSMs are those that consist all the excitation flux sources at their stator with robust rotor structure. The rotor is designed as segmental due to the reason that segmental rotor has ability to yield the magnetic path for conveying the field flux to nearby stator armature coil with respect to the rotation of the rotor. This design gives the clear advantage of shorter end winding compared to the toothed rotor as there is no overlap winding between field excitation coil (FEC) and armature coil. In this paper the initial design of HEFSM with segmental rotor has been improved by changing segment span, FEC slot area and armature slot area until maximum torque and power of 33.633 Nm and 8.17 KW respectively have been achieved. Moreover coil test analysis, induced voltage, cogging torque, magnetic flux characteristics, torque vs. field current density and torque vs. power speed characteristics are examined on the basis of 2-D finite element analysis (FEA).

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Qi, Chao, Ye Wang, Wei Jian Liu, and Yong Quan. "Research and Progress of Electromagnetic Coil Gun Ranging." Advanced Materials Research 1049-1050 (October 2014): 1176–80. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.1176.

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The armature trigger position of multi-stage electromagnetic coil gun has great influence on the exit velocity of projectile. The energy conversion efficiency of the coil gun can be improved effectively if the armature is triggered in the optimum position. So it is important to detect the projectile position in time. Several typical electrical and optical methods for position detection are summarized in this paper. The advantages and disadvantages of each method are analyzed and evaluated. And a new laser scattering measurement method is proposed. Results show that optical detection method is simple and easy to implement, but it is susceptible to environmental impacts.

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Vertelis, Vilius, Saulius Balevicius, Voitech Stankevic, Nerija Zurauskiene, and Markus Schneider. "The Application of a CMR-B-Scalar Sensor for the Investigation of the Electromagnetic Acceleration of Type II Superconductors." Sensors 21, no. 4 (February 11, 2021): 1293. http://dx.doi.org/10.3390/s21041293.

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In this paper, we investigated the behavior of a type II superconducting armature when accelerated by a pulsed magnetic field generated by a single-stage pancake coil. While conducting this investigation, we performed a numerical finite element simulation and an experimental study of the magnetic field dynamics at the edge of the pancake coil when the payload was a superconducting disc made from YBa2Cu3O7−x, cooled down to 77 K. The magnetic field measurements were performed using a CMR-B-scalar sensor, which was able to measure the absolute magnitude of the magnetic field and was specifically manufactured in order to increase the sensor’s sensitivity up to 500 mT. It was obtained that type II superconducting armatures can outperform normal metals when the launch conditions are tailored to their electromagnetic properties.

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Zhang, Yadong, Min Xiong, and Xiong Lin. "Research on Armature Recovery of a Coil Launcher." IEEE Transactions on Plasma Science 48, no. 6 (June 2020): 2324–29. http://dx.doi.org/10.1109/tps.2020.2992932.

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Zhang, Yadong, Jiangjun Ruan, Ying Wang, Yujiao Zhang, and Shoubao Liu. "Armature Performance Comparison of an Induction Coil Launcher." IEEE Transactions on Plasma Science 39, no. 1 (January 2011): 471–75. http://dx.doi.org/10.1109/tps.2010.2049753.

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Khan, Faisal, Erwan Sulaiman, Md Zarafi Ahmad, and Zhafir Aizat. "Parameter Sensitivity Study for Optimization of 12Slot-8Pole Three-Phase Wound Field Switched-Flux Machine." Applied Mechanics and Materials 695 (November 2014): 765–69. http://dx.doi.org/10.4028/www.scientific.net/amm.695.765.

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This paper presents parameter sensitivity study and performance analysis of 12Slot-8Pole three-phase wound field switched-flux machine (WFSFM). The proposed machine consists of 6 armature slots, 6 field-excitation coil (FEC) slots and 8 rotor poles. All active parts such as armature coil and FEC are located on the stator, while the rotor part consists of only single piece iron. This makes the machine becoming more robust and more suitable to be apply for high speed motor drive system applications. The deterministic design optimization approach is used to treat several design parameters defined in rotor, armature and FEC slot area to achieve better results than initial design. 2-D finite element analysis (FEA) is used to study various characteristics of machine. Since the initial design fail to attain the maximum torque and power, therefore the performance of machine is enhanced by refinement of several design parameters. After design refinement, WFSFM has achieved the maximum torque of 22.34 Nm and power of 5.27 kW at maximum field current density, Je of 30 A/mm2 and armature current density, Ja of 30Arms/mm2 which is approximately 3 times the torque and 2 times the power of initial design.

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Morishita, Mimpei, and Takayuki Fukuda. "The Design Method for Actuators with Field Magnets of Dual Halbach Arrays." Applied Mechanics and Materials 416-417 (September 2013): 227–32. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.227.

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The proposed magnetic circuit precisely evaluates magnetic fluxes between the field magnets of dual Halbach arrays. In the case that an actuator is configured with the dual Halback arrays and the armature coils between them, the air gap length between the dual Halbach arrays gives the maximum number of interlinkage magnetic fluxes with the armature coil through algebraic approach. The new design method is on the basis of the proposed magnetic circuit. This method makes it clear that the air gap length should be more than 1.2 times longer than the permanent magnet poles length. The utility of this design method is verified through designing cylindrical linear synchronous motor provided with the dual Halbach arrays.

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Більше джерел

Дисертації з теми "Coil armature"

Karim, A. H. M. "Gate-Turn-Off thyristor commutation of DC machines : the development of a rotating DC machine with static commutation of armature coil current using Gate-Turn-Off thyristor devices." Thesis, University of Bradford, 1986. http://hdl.handle.net/10454/3371.

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The thesis Is concerned with the development of a separately excited DC machine In which gate turn-off thyristor devices with their associated firing and protective circuits are used to provide the static commutation of armature coil current. The developed machine has Its armature winding with 24 tapping points located on the stator and Interconnected In "Lop" configuration. The Initiation of the conduction periods of armature switching devices Is defined by a digital control logic circuit. In conjunction with an Incremental rotary encoder which provides the necessary feedback Information relating to shaft speed and shaft angular position. This Is arranged such that, under normal running conditions of the machine, the axis of the radial field of the armature winding maintains the normal space-quadrature relationship with that of the main field winding, giving the optimal torque angle of 000. Provision Is made, however, within the digital control circuit for controlled departure of the armature switch tapping points from the quadrature axis positions, and the effect of this, In Improving commutation Is Investigated. The effect of Interpoles Is also explored. On the basis of the analysis carried out, a proposal Is made for the future development of the machine employing a reduced number of armature switching devices without the need for Interpole windings.

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Кочерга, Олександр Іванович. "Підвищення ефективності лінійних імпульсних електромеханічних перетворювачів за рахунок мультиякірних конфігурацій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/49201.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.01 "Електричні машини й апарати" (14 – Електрична інженерія) – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2020 р. Дисертаційна робота присвячена удосконаленню лінійних імпульсних електромеханічних перетворювачів силового та швидкісного призначення за рахунок використання декількох якорів, що взаємодіють з обмоткою індуктора. В дисертаційній роботі проведено аналіз конструкцій та сфер використання лінійних імпульсних електромеханічних перетворювачів індукційного, електромагнітного та електродинамічного типів в якості ударно-силових та прискорювальних пристроїв. Реалізовано в програмному середовищі COMSOL Multiphysics математичну модель лінійного імпульсного електромеханічного перетворювача мультиякірної конфігурації, яка враховує взаємопов’язані електричні, магнітні, механічні і теплові процеси, нелінійні магнітні та теплофізичні залежності. Розроблено класифікацію електромеханічних перетворювачів, які включають феромагнітний, котушковий та суцільний електропровідний якоря. Встановлено особливості протікання електромагнітних процесів та визначені електричні, магнітні та силові показники електромеханічних мультиякірних конфігурацій. Запропоновано комплексний критерій оцінювання ефективності, за допомогою якого проведено порівняльний аналіз перетворювачів мультиякірних конфігурацій з перетворювачами, що мають один якір. Встановлено вплив форми струму збудження на ефективність перетворювачів мультиякірних конфігурацій. Проведено експериментальні дослідження електромеханічних перетворювачів силового та швидкісного призначення з одночасним вимірюванням електричних, магнітних механічних та теплових параметрів. На базі електромеханічних перетворювачів мультиякірних конфігурацій розроблено оригінальні конструкції та випробувано моделі електромагнітної катапульти для БПЛА, магнітно-імпульсного пресу для керамічних порошкових матеріалів, електромеханічного пристрою для скидання ожеледних і снігових відкладень з проводу лінії електропередачі та пристрою для знищення інформації на твердотільному цифровому SSD накопичувачі.
The dissertation for the degree of Candidate of Technical Sciences in the specialty 05.09.01 “Electric machines and apparatus” (14 - Electrical Engineering) - National Technical University “Kharkov Polytechnic Institute”, Kharkov, 2020. The dissertation is devoted to the improvement of linear pulsed electromechanical converters due to multi-dia configurations. In the dissertation work the analysis of designs and spheres of use of linear pulse electromechanical converters of induction, electromagnetic and electrodynamic type as shock-power and accelerating devices is carried out. Developed and implemented in the COMSOL Multiphysics software environment, a mathematical model of linear pulse electromechanical converters multi-core configuration, which takes into account the interconnected electrical, magnetic, mechanical and thermal processes, nonlinear magnetic and thermophysical dependences. The classification of electromechanical converters which includes ferromagnetic, coil and massive electrically conductive anchors is developed. The peculiarities of the course of electromagnetic processes are established and the electrical, magnetic and power indicators of electromechanical converters of multi-core configurations are determined. A complex criterion for evaluating the efficiency is proposed, by means of which a comparative analysis of electromechanical converters of multicore configurations with electromechanical converters having one anchor is carried out. The influence of the form of excitation current on the efficiency of electromechanical converters of multicore configurations is established. The method is developed and experimental researches of electromechanical converters of power and speed appointment with simultaneous measurement of electric, mechanical and thermal parameters are carried out. On the basis of electromechanical converters multi-core configurations, original designs of electromagnetic catapult models for UAVs, magnetic-pulse press for ceramic powder materials and electromechanical device for discharge of ice and snow deposits from the power line wire were developed and tested.

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Bissal, Ara. "On the Design of Ultra-fast Electro-Mechanical Actuators." Licentiate thesis, KTH, Elektroteknisk teori och konstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121181.

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The continuously increasing demand for connecting electric grids with remote renewable energy sources such as wind power and photovoltaic cells has rekindled interest in high voltage direct current (HVDC) multi-terminal networks. Although HVDC networks have numerous benefits, their adoption relies entirely on the availability of HVDC circuit breakers which, compared to traditional alternating current circuit breakers, have to operate in a time frame of milliseconds. This thesis deals with the design of ultra-fast electro-mechanical actuators based on the so-called Thomson coil (TC) actuator. The simulation of a (TC) actuator constitutes a multi-physical problem where electromagnetic, thermal, and mechanical aspects must be considered. Moreover, it is complex since all those variables are co-dependent and have to be solved for simultaneously. As a result, a multi-physics simulation model that can predict the behavior and performance of such actuators with a high degree of accuracy was developed. Furthermore, other actuator concepts were also investigated and modeled in light of searching for a drive with a superior efficiency. The theory behind the force generation principles of two different types of ultra-fast electromechanical actuators, the TC and the double sided coil (DSC), were compared by the use of static, frequency, and comprehensive transient multi-physics finite element simulation models. Although, simulation models serve as a powerful tool for modeling and designing such state of the art actuators, without validation, they are weak and prone to errors since they rely on approximations and simplifications that might not always hold. Therefore, a prototype was built in the laboratory and the model was validated experimentally. Finally, it is important to note that the drives in this thesis are intended to actuate metallic contacts. As such, their behavior and performance upon mechanical loading was studied. Furthermore, some scaling techniques were applied to boost their performance and efficiency.

QC 20130422

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Bissal, Ara. "Modeling and Verification of Ultra-Fast Electro-Mechanical Actuators for HVDC Breakers." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162921.

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The continuously increasing demand for clean renewable energy has rekindled interest in multi-terminal high voltage direct current (HVDC) grids. Although such grids have several advantages and a great potential, their materialization has been thwarted due to the absence of HVDC breakers. In comparison with traditional alternating current (AC) breakers, they should operate and interrupt fault currents in a time frame of a few milliseconds. The aim of this thesis is focused on the design of ultra-fast electro-mechanical actuator systems suitable for such HVDC breakers.Initially, holistic multi-physics and hybrid models with different levels of complexity and computation time were developed to simulate the entire switch. These models were validated by laboratory experiments. Following a generalized analysis, in depth investigations involving simulations complemented with experiments were carried out on two of the sub-components of the switch: the ultra-fast actuator and the damper. The actuator efficiency, final speed, peak current, and maximum force were explored for different design data.The results show that models with different levels of complexity should be used to model the entire switch based on the magnitude of the impulsive forces. Deformations in the form of bending or elongation may deteriorate the efficiency of the actuator losing as much as 35%. If that cannot be avoided, then the developed first order hybrid model should be used since it can simulate the behavior of the mechanical switch with a very good accuracy. Otherwise, a model comprising of an electric circuit coupled to an electromagnetic FEM model with a simple mechanics model, is sufficient.It has been shown that using a housing made of magnetic material such as Permedyn, can boost the efficiency of an actuator by as much as 80%. In light of further optimizing the ultra-fast actuator, a robust optimization algorithm was developed and parallelized. In total, 20520 FEM models were computed successfully for a total simulation time of 7 weeks. One output from this optimization was that a capacitance of 2 mF, a charging voltage of 1100 V and 40 turns yields the highest efficiency (15%) if the desired velocity is between 10 m/s and 12 m/s.The performed studies on the passive magnetic damper showed that the Halbach arrangement gives a damping force that is two and a half times larger than oppositely oriented axially magnetized magnets. Furthermore, the 2D optimization model showed that a copper thickness of 1.5 mm and an iron tube that is 2 mm thick is the optimum damper configuration.

QC 20150422

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Книги з теми "Coil armature"

Ilari, Virgilio. Il generale col monocolo: Giovanni de Lorenzo 1907-1973. Ancona: Nuove ricerche, 1994.

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Частини книг з теми "Coil armature"

Yang, Lin, Yanming Li, Shasha Wang, Yazhou Zhang, and Chengfei Zheng. "Force Analysis of Armature in Induction Coil Launcher and Design of Double-Layer Armature." In Lecture Notes in Electrical Engineering, 24–33. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1870-4_3.

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Yu, Qiang, Xuesong Wang, Yuhu Cheng, and Lisi Tian. "An Analytical Model of Concentric Layer Structure for Canned Machines, Part I: Armature Coils." In Analysis and Mathematical Models of Canned Electrical Machine Drives, 71–112. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2745-2_4.

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Kawai, Masamichi, Masafumi Fujita, Junji Ohmori, Tadashi Tokumasu, Motoaki Terai, and Akihiko Miura. "The Electromagnetic Analysis for MAGLEV Train under Short-circuit of the Armature Coil." In Advanced Computational and Design Techniques in Applied Electromagnetic Systems, 483–86. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-444-82139-3.50128-2.

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Flowers, Thomas H. "Colossus." In Colossus. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780192840554.003.0016.

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Machines such as counters, computers, and Colossus process information. Items of information are given a physical identity which can be recognised and transmitted over distance. The identity is transmitted by what is called a signal and the relationship between the signals and the information they represent is called a code (as distinct from a cipher). Certain types of numbers are commonly used to identify items of information, because they are universally known and endless in quantity: the information, processors, and processing are then said to be digital. Processing consists of logical operations carried out serially on the numbers until a conclusion has been reached, expressed in numbers which can be converted to information by the code. Automatic number processors may be wholly or in part mechanical, electromechanical, or electronic. For the present purpose, electromechanical operation is the easiest to describe and to understand and so will be used as the starting point of this exposition. Electromechanical processors comprise electrical circuits consisting of switches interconnected by wire conductors. A switch is a device which can be set into one of two states, the unoperated or OFF state and the operated or ON state. The earliest switches used movable metal elements called contacts which could be pressed together to connect, or separated to disconnect, two wires that were attached to the contacts. Some metal contact switches used electric motors to operate them. All switches are stable in their OFF states. In their ON states, they may be stable only so long as the operating force is maintained. When this force is removed, they may remain in the ON state or revert to the OFF state. An electric light switch is an example of a manually operated switch which is stable in both the OFF and the ON states. A bell ‘push-button to ring’ switch reverts to the OFF state when the operating force is removed. Electromechanical (i.e. electromagnetically operated) switches usually take the form of relays, each of which consists of a U-shaped iron structure, as shown in Figure 1, around part of which a coil of wire has been wound. A hinged iron armature bridges the open end of the U.

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Hong, Soon–Heum, Song–Yop Hahn, and Guee–Soo Cha. "Analysis of electromagnetic forces of EDS with quadruple armature coils." In Advanced Computational and Design Techniques in Applied Electromagnetic Systems, 479–82. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-444-82139-3.50127-0.

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Тези доповідей конференцій з теми "Coil armature"

Xiang, Hongjun, Jiansheng Yuan, Xinbao Gao, and Zhiyuan Li. "Matching Characteristics of Driving Coil Turns and Armature Velocity for Electromagnetic Inductive Coil Launcher." In 2012 Sixth International Conference on Electromagnetic Field Problems and Applications (ICEF). IEEE, 2012. http://dx.doi.org/10.1109/icef.2012.6310296.

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Hong, Shane Y., SeongChan Jun, Mark Bordner, Roderick Fair, and Chris Weatherbie. "Coil Winding Tension Control." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0735.

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Abstract This paper analyzes the current coil-winding machine to determine the wire tension occurring at various locations along the winding apparatus. The goal is to make possible design improvements for better wire tension control at the armature to prevent wire breakage and to enable high-speed winding. A typical commercial winding machine was analyzed. The computer simulation result suggests design modification is needed. Three new design concepts are presented. In the new designs, the path of the flier end pulley is no longer fixed. This allows the flier arm to deflect in response to tension fluctuations to achieve a more uniform tension during the winding process.

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Li San-qun, Guan Xiao-cun, Lin Zhi-yuan, and Han Wei. "Analyses of the armature temperature field of synchronouslyinduction coil launcher." In 2008 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2008. http://dx.doi.org/10.1109/vppc.2008.4677810.

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Engel, T. G., W. C. Nunnally, J. M. Gahl, and W. Clay Nunnally. "Medium-Bore Helical-Coil Electromagnetic Launcher with A Liquid Nitrogen Cooled Armature." In 15th IEEE International Pulsed Power Conference. IEEE, 2005. http://dx.doi.org/10.1109/ppc.2005.300497.

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Luo, Meizhu, Zijiao Zhang, and Chaoqun Luo. "Analysis and Optimization on Armature Reaction of a Rotary-Linear Voice Coil Motor." In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2019. http://dx.doi.org/10.1109/icems.2019.8922140.

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Xiang, Hongjun, Jiansheng Yuan, and Zhiyuan Li. "Analysis of the force characteristic on the armature of inductive coil launcher and trigger strategy." In 2011 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2011. http://dx.doi.org/10.1109/iceceng.2011.6057736.

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Tessarolo, Alberto, Mario Mezzarobba, and Michele Degano. "Analytical calculation of air-gap armature reaction field including slotting effects in fractional-slot concentrated-coil SPM multiphase machines." In 2011 International Conference on Power Engineering, Energy and Electrical Drives (POWERENG). IEEE, 2011. http://dx.doi.org/10.1109/powereng.2011.6036542.

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Elez, Ante, Stjepan Car, and Zlatko Maljkovic. "Detection of inter-coil short circuits in synchronous machine armature winding on the basis of analysis of machine magnetic field." In 2010 XIX International Conference on Electrical Machines (ICEM). IEEE, 2010. http://dx.doi.org/10.1109/icelmach.2010.5607675.

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Popham, Vernon W., Christopher C. Lawrenson, Ronald F. Burr, and Bart Lipkens. "Variable Gap-Reluctance Linear Motor With Application to Linear Resonance Compressors." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/nca-23518.

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Abstract Variable gap-reluctance linear motors operate on the principle of electromagnetic attraction across an air gap between a moving armature and a stator and coil, which minimizes reluctance or stored magnetic energy. The direction of motion, force and magnetic field are aligned and are perpendicular to the air gap. When the air gap and corresponding stroke are moderate, large amounts of force and power can be delivered from a compact design. Several sizes of a new variable gap-reluctance linear motor design have been developed, characterized and applied. Practical application is demonstrated for linear resonance diaphragm refrigerant and gas compressors. A leaf spring suspension is used to dynamically match the motor to the resonance compressor load. Analysis and experimental results are combined to develop and characterize both the basic motor and integrated compressor designs.

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Kramer, Thomas, Jürgen Weber, Günther Pflug, and Bodo Harnisch. "Investigations on Condition Monitoring and Potential Energy Savings of Bi-Stable Process Valves Using Position Estimation." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4272.

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Bi-stable latching valves are an energy efficient alternative to mono-stable switching valves especially in applications of process technology requiring low switching frequencies. The bi-stability of such valves may be disadvantageous. Valve’s states may not only change by controlling the coil current, but also by undesired external forces. A sensorless position determination by detecting the armature position allows condition monitoring. Additionally, an appropriate power supply for switching the valve’s state increases the energy efficiency even further and can be realized by detecting the end stop with the basics of the position estimation method. The paper deals with simulation-based investigations of a promising sensorless position determination of a novel bi-stable valve, which is partly manufactured from injection moldable magnetic material. The constraints and potentials of the estimation method are described, especially according to condition monitoring the valve’s state. Selected simulation results are validated by measurements. Furthermore, simulations of the magnetic behavior and the mechanical motion are performed demonstrating the potential for detection of the motion’s end stop to apply only the required switching energy to the actuator.

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