Relevant bibliographies by topics / Homopolar generators

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Homopolar generators'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Homopolar generators"

1

McNab, I. R. "Homopolar generators for electric guns." IEEE Transactions on Magnetics 33, no. 1 (1997): 461–67. http://dx.doi.org/10.1109/20.560056.

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Perkins, D., K. Nalty, and W. Walls. "Self excitation of iron core homopolar generators." IEEE Transactions on Magnetics 22, no. 6 (November 1986): 1653–57. http://dx.doi.org/10.1109/tmag.1986.1064671.

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Bostick, W. H. "The Hubble expansion as ascribed to mutual magnetic induction between neighboring galaxies." Laser and Particle Beams 6, no. 3 (August 1988): 405–8. http://dx.doi.org/10.1017/s0263034600005346.

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A 32-year-old hypothesis of the formation of barred-spiral galaxies (Bostick 1957, 1958, 1986; Laurence, 1956) which become coherent-self-exciting homopolar generators has recently gained confirmative support from 3-D, particle-in-cell computer simulations (Nielsen et al. 1979; Buneman et al. 1980; Peratt et al. 1980, 1984, 1986). Such galaxies should be able to convert an appreciable fraction, f, of the energy from their gravitationally-collapsing plasmas to coherently-increasing magnetic energy via their coherent, self-exciting, homopolar-generator action. The following simple calculation shows that the resulting mutually-induced magnetic repulsions (Len's law) between neighboring galaxies is greater than the gravitational attractive forces between the galaxies. The observed expansion of the Universe can be thus simply accounted for without recourse to the ‘Big Bang’ hypothesis, with its unaccounted-for mysteries.
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Engel, Thomas G., and Evan A. Kontras. "Modeling and Analysis of Homopolar Motors and Generators." IEEE Transactions on Plasma Science 43, no. 5 (May 2015): 1381–86. http://dx.doi.org/10.1109/tps.2015.2405531.

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Kalsi, Swarn, Kent Hamilton, Robert Buckley, and Rodney Badcock. "Superconducting AC Homopolar Machines for High-Speed Applications." Energies 12, no. 1 (December 28, 2018): 86. http://dx.doi.org/10.3390/en12010086.

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This paper presents a novel high-speed alternating current (AC) homopolar motor/generator design using stationary ReBCO excitation windings. Compact, lightweight, high-efficiency motors and generators are sought for a multitude of applications. AC homopolar synchronous machines are an ideal choice for such applications as these machines enable very high rotational frequencies. These machines include both AC armature winding and direct current (DC) excitation winding within the stationary part of the machine. The stationary excitation winding magnetizes a solid steel rotor, enabling operating speeds limited only by the mechanical stress limit of the rotor steel. The operating speeds are many multiples of conventional power 50/60 Hz machines. Significant cooling requirements limit machines of this type utilizing copper excitation windings to only a few kilowatts. However, megawatt ratings become possible when superconductor coils are used. This paper describes the design and analysis of an AC homopolar machine in the context of developing a 500 kW flywheel system to be used for energy recovery and storage in commuter rail subway systems. Different approaches are discussed for an AC armature employing conventional copper coils. Challenges of building and cooling both armature and field coils are discussed and preferred approaches are suggested. Calculations of the machine performance are then made.
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Makel, D. "Thermal design and development of actively cooled brushes for compact homopolar generators." IEEE Transactions on Magnetics 22, no. 6 (November 1986): 1603–8. http://dx.doi.org/10.1109/tmag.1986.1064691.

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Dmitrievskii, Vladimir, Vladimir Prakht, Alecksey Anuchin, and Vadim Kazakbaev. "Design Optimization of a Traction Synchronous Homopolar Motor." Mathematics 9, no. 12 (June 11, 2021): 1352. http://dx.doi.org/10.3390/math9121352.

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Synchronous homopolar motors (SHMs) have been attracting the attention of researchers for many decades. They are used in a variety of equipment such as aircraft and train generators, welding inverters, and as traction motors. Various mathematical models of SHMs have been proposed to deal with their complicated magnetic circuit. However, mathematical techniques for optimizing SHMs have not yet been proposed. This paper discusses various aspects of the optimal design of traction SHMs, applying the one-criterion unconstrained Nelder–Mead method. The considered motor is intended for use in a mining dump truck with a carrying capacity of 90 tons. The objective function for the SHM optimization was designed to reduce/improve the following main characteristics: total motor power loss, maximum winding current, and torque ripple. One of the difficulties in optimizing SHMs is the three-dimensional structure of their magnetic core, which usually requires the use of a three-dimensional finite element model. However, in this study, an original two-dimensional finite element model of a SHM was used; it allowed the drastic reduction in the computational burden, enabling objective optimization. As a result of optimization, the total losses in the motor decreased by up to 1.16 times and the torque ripple decreased by up to 1.34 times; the maximum armature winding current in the motor mode decreased by 8%.
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Dmitrievskii, Vladimir, Vladimir Prakht, and Vadim Kazakbaev. "Design Optimization of a Synchronous Homopolar Motor with Ferrite Magnets for Subway Train." Mathematics 11, no. 3 (January 22, 2023): 589. http://dx.doi.org/10.3390/math11030589.

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Brushless synchronous homopolar machines (SHM) have long been used as highly reliable motors and generators with an excitation winding on the stator. However, a significant disadvantage that limits their use in traction applications is the reduced specific torque due to the incomplete use of the rotor surface. One possible way to improve the torque density of SHMs is to add inexpensive ferrite magnets in the rotor slots. This paper presents the results of optimizing the performances of an SHM with ferrite magnets for a subway train, considering the timing diagram of train movement. A comparison of its characteristics with an SHM without permanent magnets is also presented. When using the SHM with ferrite magnets, a significant reduction in the dimensions and weight of the motor, as well as power loss, is shown.
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Appleton, A. D. "Superconducting Marine Propulsion Power." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 206, no. 2 (May 1992): 73–82. http://dx.doi.org/10.1243/pime_proc_1992_206_014_02.

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Over the last 25 years a large amount of research and development has been undertaken on the application of superconductors to marine propulsion systems and a number of superconducting homopolar motors and generators were constructed between the mid 1960s and the early 1980s. The paper reviews this work and shows that the technology had almost reached the point where industrial exploitation could have commenced. The reason why these machines did not reach the market place is discussed together with the impact which the recently discovered higher temperature superconductors may have upon future developments. Reference is made to a new ship which has been constructed in Japan and which derives its thrust directly from electrical energy using superconducting magnets in an engine based upon magnetohydrodynamics (MHD). With the exception of the MHD ship and the programme in the United States all of the work on d.c. machines described in this paper has been carried out by or under the direction of the author.
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Wu, A. Y., and K. S. Sun. "Formulation and implementation of the current filament method for the analysis of current diffusion and heating in conductors in railguns and homopolar generators." IEEE Transactions on Magnetics 25, no. 1 (1989): 610–15. http://dx.doi.org/10.1109/20.22610.

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Dissertations / Theses on the topic "Homopolar generators"

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Belarde, Gianetta Maria Engel Thomas G. "Modeling the behavior of a homopolar motor." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/5678.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on September 16, 2009). Thesis advisor: Dr. Thomas G. Engel. Includes bibliographical references.
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Chalasani, Dheeraj. "FEASIBILITY OF A PLASMA CONTACT FOR FARADAY GENERATORS." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1367560698.

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Baymani, Nezhad Mehdi. "Study of homopolar DC generator." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/study-of-homopolar-dc-generator(cf6b968e-9f64-4b3f-ac5e-6ea80d122317).html.

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The aerospace and marine sectors are currently using or actively considering the use of DC networks for electrical distribution. This has several advantages: higher VA rating per unit volume of cable and ease of generator connections to the network. In these systems the generators are almost exclusively ac generator (permanent magnet or wound field synchronous) that are linked to the dc network via an electric converter that transforms the ac generator output voltage to the dc rail voltage.The main objective of this project is to develop a Homopolar DC Generator (HDG) that is capable of generating pure DC voltage and could therefore remove the need for an electric converter and ease connection issues to a dc electrical distribution network. The project aim is to design, build and test a small technology demonstrator, as well as electromagnetic modeling validation.In Chapter 1, the initial generator concepts proposed to fulfill the aforementioned requirements of DC generator are presented, as well as an obscurity in electromagnetic induction law faced at the beginning of this project. Also the advantages, disadvantages and different applications of Homopolar DC Generators are covered in Chapter 1. In Chapter 2, Faraday's law of induction and the ways of using it properly are discussed using some example. The preliminary design calculations to construct the prototype HDG are presented in Chapter 3. Also the prototype construction and assembly procedure are discussed in this chapter. In this project, magnetostatics and current flow Finite Element (FE) simulations were used to assess the prototype HDG. In Chapter 4, the results of 2D and 3D-FE simulation are presented; furthermore the limitations of the FE simulations to assess the HDG performance are included. In Chapter 5, the results of the practical tests are demonstrated and assessed, as well as comparison between some of the results obtained practically and those obtained using FE-modeling. Using sliding contacts in the HDG is obligatory so some definitions corresponding to electrical contact resistances are given in Chapter 5. Final chapter is conclusions including the results assessments, future works to design, simulation and construction of the HDG.
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Pyc, Marcin [Verfasser]. "Development and Optimization of a Novel Homopolar Starter-Generator / Marcin Pyc." Aachen : Shaker, 2010. http://d-nb.info/1124364668/34.

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Books on the topic "Homopolar generators"

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The homopolar handbook: A definitive guide to Faraday disk and N-machine technologies. 2nd ed. Washington, D.C: Integrity Research Institute, 1998.

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2

Valone, Thomas. The Homopolar Handbook: A Definitive Guide to Faraday Disk & N-Machine Technologies. Integrity Research Institute, 1994.

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Book chapters on the topic "Homopolar generators"

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"Feasibility Study on using Homopolar Motors Coupled to Synchronous Generators to Convert DC Power from a Liquid- Metal MHD System to AC Power." In Liquid Metal Flows: Magnetohydrodynamics and Application, 308–21. Washington DC: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/5.9781600865862.0308.0321.

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Luguang, Yan, Liu Decheng, Li Yiping, Lin Qitang, Qin Jie, and Yi Changlian. "SUPERCONDUCTING MAGNET No. 1 FOR 300 KW HOMOPOLAR GENERATOR." In Proceedings of the Twelfth International Cryogenic Engineering Conference Southampton, UK, 12–15 July 1988, 763–67. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-408-01259-1.50148-0.

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Conference papers on the topic "Homopolar generators"

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Bianchini, Claudio, Fabio Immovilli, Alberto Bellini, Emilio Lorenzani, Carlo Concari, and Marco Scolari. "Homopolar generators: An overview." In 2011 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2011. http://dx.doi.org/10.1109/ecce.2011.6063962.

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Engel, T. G., and E. A. Kontras. "Analysis and design of homopolar motors and generators." In 2014 17th International Symposium on Electromagnetic Launch Technology (EML). IEEE, 2014. http://dx.doi.org/10.1109/eml.2014.6920662.

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In-Soo Kim, Dong-gyun Choe, Sang-ho Choi, and Se-jin Seong. "Modeling, Simulation and Analysis of a Homopolar Generator with Input Limiter." In International Electric Machines and Drives Conference. IEEE, 2005. http://dx.doi.org/10.1109/iemdc.2005.195832.

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Tomino, J., K. Yosizue, A. Chiba, and T. Fukao. "Output DC voltage control system of a doubly salient-pole homopolar generator." In 6th International Workshop on Advanced Motion Control. Proceedings. IEEE, 2000. http://dx.doi.org/10.1109/amc.2000.862939.

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Khatri, Rasish, Larry Hawkins, Massimiliano Ortiz Neri, Francesco Cangioli, and Davide Biliotti. "Design and Prototype Test Data for a 300 kW AMB-Supported Turbine Generator for Natural Gas Pressure Letdown." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91172.

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Abstract A 300 kW integrated and fully-sealed turbine generator for natural gas pressure letdown (PLD) was developed by Baker Hughes, a GE company (BHGE), in conjunction with Calnetix Technologies. This paper describes the design and analysis of the generator, magnetic bearings, and touchdown bearings, with a focus on the dynamic performance and key characteristics of the machine. The permanent magnetic (PM) synchronous generator is supported by PM-biased, homopolar magnetic bearings and has a maximum continuous operating speed (MCOS) of 31.5 krpm. A touchdown bearing system is implemented using rolling element bearings, with soft mount supports. Also described is a thrust load balancing scheme that uses the thrust bearing coil current for reference. A time transient simulation showing the effect of process conditions on the AMB dynamics is shown. Preliminary data from the prototype mechanical run test are shown, including transfer functions measured using the magnetic bearings, Campbell diagram, and touchdown bearing drop test results.
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Afjei, E., H. Moradi, and A. Siadatan. "The efficiency estimation of 15–10 double salient-pole Homopolar Brushless dc Generator." In 2012 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM 2012). IEEE, 2012. http://dx.doi.org/10.1109/speedam.2012.6264371.

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Walls, W. A., J. H. Gully, W. F. Weldon, and H. H. Woodson. "A 1 GJ pulsed homopolar generator technology demonstration for the IGNITEX ignition experiment." In 1990 Plasma Science IEEE Conference Record - Abstracts. IEEE, 1990. http://dx.doi.org/10.1109/plasma.1990.110530.

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Sledge, R. L., G. W. Brunson, W. A. Walls, M. D. Werst, and W. F. Weldon. "Energy transfer from a homopolar generator to a single turn coil toroidal field magnet." In 1990 Plasma Science IEEE Conference Record - Abstracts. IEEE, 1990. http://dx.doi.org/10.1109/plasma.1990.110531.

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Vannini, A., L. Papini, A. Marfoli, C. Gerada, and P. Bolognesi. "Concept and Preliminary Sizing of a Dual DC-Bus Homopolar Generator Using Diode Rectifiers." In 2022 International Conference on Electrical Machines (ICEM). IEEE, 2022. http://dx.doi.org/10.1109/icem51905.2022.9910897.

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Amirat, Yassine, Vincent Choqueuse, and Mohamed Benbouzid. "Wind turbine bearing failure detection using generator stator current homopolar component ensemble empirical mode decomposition." In IECON 2012 - 38th Annual Conference of IEEE Industrial Electronics. IEEE, 2012. http://dx.doi.org/10.1109/iecon.2012.6389263.

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Reports on the topic "Homopolar generators"

1

Knoth, Edward A., and David P. Bauer. Long Pulse Homopolar Generator. Fort Belvoir, VA: Defense Technical Information Center, August 1988. http://dx.doi.org/10.21236/ada205452.

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