The 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. Magnetic cores are used to direct the magnetic field from permanent. The technology described above is an early stage opportunity. Electric motors are so efficient, and powerful enough already, that the minor benefit outweighs the cost. Aug 10, 2016 superconducting motors are not useless in a bev, they just dont make economic sense. Learn more about creating pdf files start combining different file formats, web pages, and more into high. High power density superconducting motor for allelectric. Superconducting motors are new types of ac synchronous motors that employ.
Stationary field winding assembly to utilize mri technology. This paper deals with a preliminary electromagnetic design of a 200 hp high temperature superconducting motor optimized in terms of power density. Courtesy of professor bartek glowaki of the university of cambridge, who filmed, directed and edited the videos. However, for the 600 kmh speed, on the both sides of each vehicle, superconducting lsms are attached and the ground coils are installed on the guideway. Design and testing of a superconducting rotating machine. Existing hts motors are proofofprinciple demonstrators and exhibit power densities lower than 1 hplb, which is too low to be considered in mobile systems. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a. The article gives a brief history of the development of superconducting motors with emphasis on the use of high temperature superconductors. The authors firstly investigate the applicability of this type of machine as a generator in small and mediumsized wind turbines, then the applicability as an inwheel hub motor for electric vehicles. Superconductor manufacturing technology for nextgen. As for passenger vehicles, hybrid electric vehicles have been popular, and some massproduction models of pure electric vehicles have appeared for consumer use. Use of high temperature superconducting hts conductors. The only onestop 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.
One motor is an ac synchronous type using hts coils in the rotor. I think that the maritime propulsion can and the electrical traction generally can benefit principally to these motors. The superconducting motors and generators required for turboelectric propulsion rotate at high speeds, in the 4000 rpm to 8000 rpm range, and therefore operate at frequencies of hundreds of hertz. Abstract high temperature superconducting hts motors have a good prospect in application of marine propulsion and wind energy for its benefits of lighter, more impact and high efficiency. Superconducting motors superconducting motors and generators could be made with a weight of about one tenth that of conventional devices for the same output. Superconducting generators free download as powerpoint presentation. Pdf design considerations for fully superconducting. Introduction in recent years, electrification of automobiles is in progress. Ornl superconducting motor has big possibilities ornl. The rotor and stator windings are connected in parallel.
Are electromechanical systems that rely on the use of one or more superconducting elements. It is the most important characteristic of a superconducting wire. Electric motors with high temperature cuprate superconductors. Pdf hightemperature superconducting synchronous motors.
Follow the prompts to convert to pdf and save to your desired location. The compactness and lightness of these motors also makes them ideal for. Electric motors using high temperature superconducting. The field coil produces a magnetic field using an oxide of bismuth, strontium, calcium and copper oxide bscco, a hightemperature superconducting wire. It can operate as a motor, converting electrical into mechanical power, or as a. The rotor and stator are each connected from a different power supply, this gives another degree of freedom for controlling the motor over the shunt.
Request pdf superconducting motors and generators the story of superconducting machines began in the 1960s. Subsonic linear synchronous motors lsms with hightemperature superconducting hts magnets, which aim to accelerate to a velocity of 1200 kmh in the nearvacuum tubes of 0. This paper deals with a study on the dynamic behavior of 600 kmh wheeltype train propelled by superconducting linear synchronous motor lsm. The new design is a hightemperature motor, an eightpole machine with a stationary superconducting inductor, made of niobiumtitanium nbti, which has no. The motor has been designed for an aerospace distributed fan propulsion motor with an aerospace benchmark specification of 1 mw. Nearly a century after its first discovery, its full commercial potential is. And, significantly smaller motors are being built for navy ships using superconducting wire and tape. If there are advantages of lower size and weight for hp motors, why dont they also exist for 100 or 300 hp motors. Figure 1shows the features of a superconducting motor coil. Superconducting electric machines superconductivity is the property of having zero electrical resistance. Zheng jun, xie feng, chen wei, dai yijun, chen jin, tang wenbin.
The navy currently has contracts to build two subscale. Superconductivity is widely regarded as one of the great scientific discoveries of the 20th century. This is the appeal of making such devices for specialized applications. Any material exhibiting these properties is a superconductor. The study and test for 1mw high temperature superconducting motor. A superconducting induction motor with a high temperature superconducting armature. In order to minimize weight, these machines are invariably of the aircore type, with the armature winding fully exposed to the airgap flux. A superconducting wire with an improved critical current value can improve electric power quality and energy efficiency of applied products, such as power cables, electric transformers, motors, generators and magnets. It takes into account not only the state of the art for high and low critical temperature superconductors and the electromagnetic performances but also the mechanical and cryogenic problems and the aimed applications for these superconducting motors. This train is of a traditional wheel onrail type with traction motors on wheelbogies. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Superconductivity is a unique and powerful phenomenon of nature.
Stator design and performance of superconducting motors. A rotor assembly for use within a superconducting electric motor includes a superconducting winding formed of high temperature superconductor and during operation, generates a flux path within the rotor assembly. Investigation on the performance of dibscco superconducting. Both motors should be delivered toward the end of 2003. Also, a superconducting motor can be used without copper loss, and an aircore superconducting motor may be developed in the future to reduce iron loss and increase motor efficiency. There are many criteria by which superconductors are classified. At present, effort is directed toward the demonstration. Superconducting motors are not useless in a bev, they just dont make economic sense.
Superconducting technology will be employed in a variety of motor designs. At 32 teslas, this new recordholder is a whopping 8. Us5777420a superconducting synchronous motor construction. Also, the electric motors aboard spacecraft could be a mere 14 to 16 the size of non superconducting motors, saving precious volume and weight in the spacecrafts design. Pdf on nov 1, 2018, anup patel and others published design considerations for fully superconducting synchronous motors aimed at future electric aircraft find, read and cite all the research. The superconducting electric motor was found to consume lower power to produce the same output compared. Licensing rights to this intellectual property may be limited or unavailable. Create pdfs, how to create a fillable pdf adobe acrobat dc. Stein fossil power plants generation group prepared by reliance. A study on the dynamic behavior of wheeltype train.
Energy savings pay off primarily for large motors, 1,000 horsepower and greater. Commercial rules for making money with superconducting. Office of electricity delivery and energy reliability high temperature superconductors are the most efficient electricity. Development of hightemperature superconducting motor for. Since many years we develop and construct superconducting motors. Superconducting electric machines are electromechanical systems that rely on the use of one or more superconducting elements. Establish feasibility of superconducting motor with. Superconducting super motor and generator abstract. The primary applications of these devices will be large motors greater than 1,000hp used for pump and fan drives for utility and industrial markets.
Pdf high power density superconducting motor for all. Two prototypes of electric motor fabricated using conventional copper coil and superconducting coil were developed with similar motor type, design, dimension, and features. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a. This allows users to modify files and replay them providing a template that can be used to automate the design variations of standard products. Motors and generators are already very efficient, so there is not the power savings associated with superconducting.
Before this new magnet reached full field in december 2017, the worlds strongest superconducting user magnet had a field strength of 23. Superconducting super motor and generator ieee journals. Since superconductors have no dc resistance, they typically have greater. Superconducting conductors for largescale applications are round or tapeshaped wires in which one or more superconducting. It has developed the motor in conjunction with the swiss motor developer smartdrives, the german superconductor specialist evico, and the leibniz institute for solid state and materials research.
As with all superconducting motors, the superconducting wire can carry larger amounts of current than copper wire, and therefore create. But with the realization of using superconducting wire. High power density superconducting rotating machines. Generators presented b y sajeesh jos parakkal mtithrissur reg. A superconductor can be type i, meaning it has a single critical field, above which all superconductivity is lost and below which the magnetic field is completely expelled from the superconductor. Solid material solutions, llc biscco wire development. For marine propulsion, a hightorque, lowspeed design is favoured.
The force and power density of linear motors and actuators are limited by the remanent magnetization of permanent magnet materials and the power dissipation in the coils. In addition, the torque performances for both types of motor were measured. This train is of a traditional wheelonrail type with traction motors on wheelbogies. Development of superconducting wind turbine generators. Applications of high temperature superconductors to electric. High sensitivity with respect to amplification of electrical signals, detection of magnetic fields, and detection of light are prized applications. However, they usually require brush technology, which in itself, is very challenging. May 24, 2007 the field of electric motors has recently entered a new era. Superconducting motors and generators for naval applications. Siemens ag pdf file superconducting cables and motors. Superconducting dc motors such as homopolar motors are extremely efficient. Superconducting high strength undiffused brushless hsub.
Project sutor superconducting speedcontrolled torque motor. High power density superconducting motor for allelectric aircraft propulsion article pdf available in ieee transactions on applied superconductivity 152. Superconducting generators superconductivity electric. Since superconductors have no dc resistance, they typically have greater efficiency. A superconducting coil provides a high magnetic flux density, and therefore, delivers much higher torque than ordinary motors.
For example, the gyros that keep satellites oriented could use frictionless bearings made from superconducting magnets, improving the satellites precision. Superconductor applications georgia state university. Superconducting motors, generators, and alternators wiley online. The proposed superconducting motors and generators are modeled mathematically and simulated on a digital computer. Superconducting synchronous motor with an hts racetrack field winding di hu, jin zou, tim j. The electric motors that you see today in everything from washing machines, toys, and fans use the same basic principles as motors from. Subsonic linear synchronous motors using superconducting. Motor generator power density kwkg 3 7 40 65 efficiency % 85 % 99 % heat loss 6. Use superconductors when weight and size is an issue, and you. Like a typical motor, a superconducting motor has two main components. Patent applications directed towards this invention may not have been filed with any patent office. In midjuly, 2001, american superconductor unveiled a 5000horsepower motor made with superconducting wire below. The drive range of an automobile motor is wide, from low to high speeds and from low torque for constantspeed cruising to high torque.
The economic viability of htsbased electric motors for industrial applications depends upon the cost of the superconducting wire. Hightemperature superconductor coils are being developed for large industrial motors such as pumps and compressors which will be much more efficient, with much lower power losses. The most important parameter that is of utmost interest in superconducting machine is the generation of a very high magnetic field that. The electric motors that you see today in everything from washing machines, toys, and fans use the same basic principles as motors from 50 years ago. This paper looks at the different machine design configurations focusing on the stator magnetic circuit of a fully superconducting motor. Oct 15, 2001 superconducting motors based on high temperature superconductors are much more efficient than conventional electric motors and can be made smaller, lighter and more economically. Stanford materials highpurity oxides, metals, alloys, ceramics, and sputtering targets. These motors will be designed to operate at variable speeds below 200 rpm. Superconducting materials for large scale applications. Industrial hts motors are designed for constant speed application. Superconducting devices, though not widely used, have some unique characteristics not available in standard semiconductor devices. The superconducting motor coil was wound using bi2223 dibscco type h wires developed by sumitomo electric industries limited, japan. We have developed a new type of superconducting synchronous rotating machine whose selfinduction is cancelled out, with the intention of achieving a very high powertoweight ratio including the weight of the cooling system.
Introduction the general production program of oswald consists of electric motors up to more than kw output power, socalled torque motors up to 600 knm torque, linear motors up to 100 kn force and watercooled and superconducting magnet systems. The superconducting motor is the latest in a series of superconducting applications that festo has demonstrated in recent years. Aug 07, 2014 a series of lectures on superconductivity. In 2007 and 2008, the authors developed motors using bismuth superconducting wire and mounted it on electric vehicles to investigate the potentials and. The field of electric motors has recently entered a new era. Development efforts are continuing in many laboratories throughout the world, and improvements to both the design of the motors and to the manufacture, fabrication and properties of hts materials that are anticipated over the next few years, can be expected to make these copperbased superconducting motors a commercial reality.
Industry links superconductor week superconducting. A study on the dynamic behavior of wheeltype train propelled. They have enormous potential and can be used in various applications in process industries, pumps blowers etc. Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Jan, 2009 a typical navy ship, such as the ddx destroyer, needs two propulsion motors, each rated at 36. Superconducting generators have the potential to provide a compact and light weight drive train at high torques and slow rotational speeds, because high magnetic fields can be produced by coils with very little loss. Such large motors have been built using conventional technology but they are four to five times heavier than the onr funded 36. The other motor is a dc homopolar type using stationary lts coils. Components for the motors and generators are designed to determine their individual characteristics and their interactions with other elements of the machines. Abstracthigh temperature superconducting hts synchronous motors can offer significant weight and size reductions, as well as improved efficiency, over conventional copperwound machines due to the higher current density and lower resistance of hts materials. Superconducting high strength undiffused brushless hsub motors and generators note.
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