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Monday, May 4, 2020 | History

2 edition of Superconducting DC and AC machines. found in the catalog.

Superconducting DC and AC machines.

Robert A. Hein

Superconducting DC and AC machines.

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  • 37 Currently reading

Published by U.S. Office of Naval Research, London Branch in London .
Written in English


Edition Notes

Discussion held at the International cryogenics exhibition, Brighton, 1971.

SeriesLondon conference report -- 10-71
ContributionsUnited States. Office of Naval Research. London Branch., International Cryogenics Exhibition (1971 : Brighton)
The Physical Object
Pagination6 p.
ID Numbers
Open LibraryOL19484001M


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Superconducting DC and AC machines. by Robert A. Hein Download PDF EPUB FB2

Superconducting electric machines are electromechanical systems that rely on the use of one or more superconducting elements.

Since superconductors have no DC resistance, they typically have greater most important parameter that is of utmost interest in superconducting machine is the generation of a very high magnetic field that is not possible in a conventional machine.

The one thing for anyone considering this book is "this it is a college textbook" that is extremely heavy on math. As a matter of fact, it is hard to even find a page in this book that is not inundated with math formulas. Plus, the price is "college publishers price" that is horrible at $$ dollars/5(7).

subdivided into machines with a superconducting DC rotor and a normal conducting AC stator or into machines with a normal conducting A C rotor and a sup erconducting DC stator. The. The only book on the market that emphasizes machine Superconducting DC and AC machines.

book beyond the basic principles of AC and DC machine behavior. AC electrical machine design is a key skill set for developing competitive electric motors and generators for applications in industry, aerospace, and by: An overview of the R&D needs for superconductors in the power grid is presented, as well as more detailed case studies into the implementation of four major superconducting initiatives in China: (1) superconducting power substations, (2) fault current limiters, (3) DC power cables, and (4) superconducting magnetic energy storage.

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 by: 1. Superconducting AC Homopolar Machines for High-Speed Applications These machines include both AC armature winding and direct current (DC) excitation winding within the stationary part of the.

The operation of a SMES system is simple. A source voltage is fed into the superconducting coil. Whenever the voltage from the source is AC voltage, it must be converted to DC. Most renewable energy application sources do supply DC voltage Because of Superconducting DC and AC machines.

book power transfer from the source to the coil. Superconducting Machines and Devices: Large Systems Applications J. Powell (auth.), Simon Foner, Brian B. Schwartz (eds.) This book presents detailed discussions of several of the large scale applications of superconductivity Superconducting DC and AC machines.

book will have major economic impact on technical developments in. Superconducting machines became possible with Superconducting DC and AC machines. book development of type 2 superconductors, initially with niobium-zirconium, now with niobium-titanium and perhaps in the future niobium-tin.

The potential of superconductors to electrical engineers is graphically illustrated in Fig. 1 which compares the current carrying capacities of copper and Cited by: 2.

This book provides design and analysis for various devices and includes examples of devices built over the last decade. Starting with a complete overview of HTS, the subsequent chapters are dedicated to specific devices: cooling and thermal insulation systems; rotating AC and DC machines; transformers; fault current limiters; power cables; and.

There is a growing interest in ac superconducting machines. Of several new concepts proposed for these machines in the last years one of the most promising seems to be the ''three elements'' concept which allows the cancellation of the torque acting on the superconducting field winding, thus.

This new and extensive white paper covers the basics of coreless DC motors, and the advantages Superconducting DC and AC machines. book the coreless self-supporting rotor. This in-depth. Superconducting motors are new types of Superconducting DC and AC machines. book synchronous motors that employ HTS (high temperature superconductor) windings in place of conventional copper coils.

Because HTS wire can carry significantly larger currents than can copper wire, these windings are capable of generating Superconducting DC and AC machines. book more powerful magnetic fields in a given volume of : American Superconductor. Superconducting motors have the potential to significantly reduce losses, Figure 5, thereby delivering high energy savings.

The competing technology, iron-core induction motors, generally have. Corresponding author e-mail address: [email protected] Abstract – In this paper, the authors investigate a number of design and market considerations for an axial flux superconducting electric machine design that uses high temperature superconductors.

The authors firstly investigate the applicability of this. This book presents detailed discussions of several of the large scale applications of superconductivity which will have major economic impact on technical developments in the industrial world. The wor Superconducting DC Machines. Appleton.

Pages Applications of Superconductivity to AC Rotating Machines. Joseph L. Smith Jr. @article{osti_, title = {Electric machines and power systems}, author = {Del Toro, V.}, abstractNote = {In this book an analysis of a-c and d-c electric machines is presented.

All aspects of machine theory and applications are covered including electronic control of a-c and d-c motors as well as the novel stepper motors. 1: Large Scale Applications of Superconductivity.- 2: Practical Superconducting Materials.- 3: Superconducting Magnets.- 4: Superconducting DC Machines.- 5: Applications of Superconductivity to AC Rotating Machines.- 6: High Speed Magnetically Levitated and Propelled Mass Ground Transportation.- 7: Transmission of Electrical Energy by.

Pei, X, Smith, AC & Barnes, MSuperconducting interface for a DC circuit breaker. in Power Electronics, Machines and Drives (PEMD ), 8th IET International Conference on. CP edn, vol.Institution of Engineering and Technology, 8th IET International Conference on Power Electronics, Machines and Drives, PEMDGlasgow, UK Author: X.

Pei, A.C. Smith, M. Barnes. III. Resistive States in Wear Link Junctions.- A. The Current-Voltage Characteristics and the Resistive-Superconductive Region of a Single Superconducting Weak Link.- B. The Double Point Contact in the Resistive Superconducting Region, the dc SQUID.- 3: Superconducting Quantum Interference Devices for Low Frequency Measurements.- I.

The Hunt for Compact Power The design marries a conventional ac stator and a superconducting dc rotor. As for speed control, superconducting ac machines could be driven by pulse-width modulated converters using the latest insulated gate bipolar transistor, or IGBT, technology, just like ordinary motors, Gamble said.

Cited by: 1. This book presents detailed discussions of several of the large scale applications of superconductivity which will have major economic impact on technical developments in the industrial world. The world­ wide concern with energy problems makes this work particularly timely.

Some of the large scale. superconducting materials, the second type of research is focused on optimum thermo-mechanical procedures for the manufacture of the powder-in-tube and coated conductors using doped and substituted Mg-B compounds.

In this chapter we are discussing the second approach where one is going to design and manufacture conductors for the dc and acFile Size: 2MB. The energy transfer (either way) in AC machines is performed by a rotating magnetic field on stator and another lagging or heading (motor or generator) on rotor, the torque developed or applied is proportional to the current applied or drawn (moto.

The London equations can explain the well-known Meissner effect of exclusion of magnetic induction by superconductors. A widely used device in superconductive electronics is the JJ.

The DC and AC Josephson effects as well as the inverse AC Josephson effects are described. The application of DC and AC SQUIDs in magnetometry are discussed.

or into machines with a normal conducting AC rotor and a superconducting DC stator. The former topology of the partial SCM is investigated in this paper. In contrast, the topology of the fully SCM uses superconducting DC coils in the rotor and superconducting AC coils in the stator.

In superconducting DC rotor coils, only low losses occur Cited by: 1. Off hand (from memory and generally keeping track) - S J Chapman; M G Say; A K Sawhney (?); D P Kothari + I J Nagrath (Tata McGraw Hill; I think) and B L Theraja who was popular because of perhaps the solved question papers - more study friendly?.

Superconducting and conventional machines A M Campbell Department of Engineering, Cambridge, UK E-mail: [email protected] Received 4 Julyrevised 16 September Accepted for publication 23 September Published 18 November Abstract A general comparison is made between conventional and superconducting machines using.

potential, yet each individual electric machine adds to the overall system inefficiency. A fully superconducting machine has been developing at GRC (see Fig. 1), and it offers potential for specific powers up to 40 W/g and 99% efficiency, if alternating current (AC) losses can be minimized.

The ultimate goal of the SC AC electric machines isFile Size: 1MB. The SM-LSM consists of dc superconducting coils placed on the mover and an active guideway with three-phase air-core cable windings placed horizontally or vertically.

The air-core cable three-phase ac windings on ground allow for longer energized sections because the total inductance per section is. A large body of research is currently being conducted into superconducting power system applications, targeting improved efficiency and reductions in system size and weight.

In order to attain the required levels of safety and reliability of the superconducting power system, effective protection systems, tailored to the specific fault behaviour Cited by: 5.

Electrical Materials Research for NASAs Hybrid Electric Commercial Aircraft Program • For superconducting machines need low loss AC portions – conductors, etc • Must have higher voltages on the aircraft, thus Superconducting (zero DC conduction loss) leads to much higher File Size: 6MB.

transfer the magnetic energy of DC or AC magnetic fields inductively between two independent iron cores from one closed iron core to the other one. Thus, DC magnetic field can be transformed in a controlled way.

This method can result in novel applications in the field of transferring both the energy of DC magnetic field and AC electrical energy. DC Machines There are two types of motor, one is AC motor and other is DC motor. It is an electro-mechanical device that converts electrical energy to mechanical energy.

Generators is based on the fundamental principle of Faraday’s laws of Electromagnetic Induction. This book enables y ou to design rotating electrical machines with its detailed step-by-step approach to machine design and thorough treatment of all existing and emerging technologies in this field.

Senior electrical engineering students and postgraduates, as well as. This book enables you to design rotating electrical machines with its detailed step-by-step approach to machine design and thorough treatment of all existing and emerging technologies in this field. Senior electrical engineering students and postgraduates, as well as machine designers, will find this book invaluable.

superconducting motor and a refrigerator. The test results showed that the motor has torque of Nm and an output of 30 kW, and the prototype vehicle obtains the maximum speed of 80 km/h. Keywords: superconductor, motor, electric vehicle Development of High-Temperature Superconducting Motor for Automobiles A *, AAA A, AA, AA A AAFile Size: KB.

mode, a constant current, generally ranged A, flowing in the dc coil and the superconducting dc coil magnetizing the iron core. The setting of the value of the constant current depends on the load current of the ac coils and is controlled by the control unit.

At this state, the voltage between the two current leads of the. The only one-stop reference to design, analysis, and manufacturing concepts for power devices utilizing HTS. High temperature superconductors (HTS) have been used for building many devices for electric grids worldwide and for large ship propulsion motors for the U.S.

Navy. And yet, there has been no single source discussing theory and design issues relating to power applications of HTS—until. Pdf multicolor edition of of A Textbook of Electrical Technology to keep pace with the ever-increasing scope of essential and morden technical information,the syllabi are frequently often result into compressing established facts to accommodate recent information in the of power-electronics and industrial power-conditioners have grown considerably resulting /5(9).

Download pdf, superconducting transformers not only eliminate the electrical resistance in the wires but also allow the construction of useful transformers without a core.

The core will generate heat as the magnetic domains are constantly flipped in the alternating field of the windings of the transformer, and this is the biggest energy loss in most.