High-Temperature Superconducting Synchronous Motors: Economic Issues for Industrial Applications

Schiferl, R.F.; Flory, A.; Livoti, William C.; Umans, S.D.

doi:10.1109/tia.2008.2002219

Cited by 33 publications

(25 citation statements)

References 6 publications

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“…Similarly, the temperature dependent cooling capacity is also an essential parameter of the model. For the modelling and simulation efforts, the heat loads and cooling capacity curves are defined as polynomials and the basic heat load values and their variation with the operating temperature are taken from the literature and our previous experience with the demonstration of HTS devices and associated cryogenic helium circulation systems [21,27]. For the purpose of the model, the heat load of the motor is defined as…”

Section: System Components In Thermal Network Modelmentioning

confidence: 99%

Coupled Cryogenic Thermal and Electrical Models for Transient Analysis of Superconducting Power Devices with Integrated Cryogenic Systems

Satyanarayana

Indrakanti

Kim

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Benefits of an integrated high temperature superconducting (HTS) power system and the associated cryogenic systems on board an electric ship or aircraft are discussed. A versatile modelling methodology developed to assess the cryogenic thermal behavior of the integrated system with multiple HTS devices and the various potential configurations are introduced. The utility and effectiveness of the developed modelling methodology is demonstrated using a case study involving a hypothetical system including an HTS propulsion motor, an HTS generator and an HTS power cable cooled by an integrated cryogenic helium circulation system. Using the methodology, multiple configurations are studied. The required total cooling power and the ability to maintain each HTS device at the required operating temperatures are considered for each configuration and the trade-offs are discussed for each configuration. Transient analysis of temperature evolution in the cryogenic helium circulation loop in case of a system failure is carried out to arrive at the required critical response time. The analysis was also performed for a similar liquid nitrogen circulation for an isobaric condition and the cooling capacity ratio is used to compare the relative merits of the two cryogens. IntroductionHigh Temperature Superconducting (HTS) power devices are attractive for applications that require high power densities such as electric aircrafts and ships [1][2][3][4][5][6][7]. Future all-electric ships and aircrafts will have multiple large electrical loads and the integrated power system to support the loads needs to be flexible to meet the various potential missions. The trend is to reduce the size of aircrafts and ships to increase fuel economy and operational effectiveness [6,8]. The two apparently competing interests are being met with new technologies, integrated power systems, and innovative ship and aircraft designs. The large electrical loads on ships and aircrafts are required only in certain mission scenarios. Hence, power devices with high power densities and variable power ratings that offer tunability would facilitate meeting the design challenges of future all-electric ships and aircrafts. HTS technology has the ability to support the design goals while providing operational flexibility. HTS technology is particularly suitable for direct current (DC) systems and the navy has decided to adapt integrated DC power system for future all-electric ships and aircrafts. HTS materials offer a wide operating temperature window and their current carrying capability varies significantly depending on the cryogenic operating temperature; current density of HTS materials can change up to 10 times by changing the temperature by 40 K. Use of gaseous helium as the cryogen in conjunction with the cryocooler technology allows operating temperatures between 20 and 77 K, giving a large operating temperature window for HTS devices. High

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Section: System Components In Thermal Network Modelmentioning

confidence: 99%

Coupled Cryogenic Thermal and Electrical Models for Transient Analysis of Superconducting Power Devices with Integrated Cryogenic Systems

Satyanarayana

Indrakanti

Kim

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Considering the interface conditions (7) and (8), the general solution of the magnetic vector potential in the ith hole domain is rewritten as …”

Section: General Solution Of Laplace's Equation In the I-th Hole Sub-mentioning

confidence: 99%

“…Hts materials can be used in various types of electrical devices like motors and generators which represent an important part of the superconducting applications [8]. Among them, Superconducting Synchronous Reluctance Motors (ScSynRM) are studied and tested in different companies and research institutes [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…This implied that a magnetic field applied near this superconductor will be excluded like for a diamagnetic material. A cryostat is inserted between the stator windings and the outer iron yoke to cool down the whole HTS motor at low temperature with liquid nitrogen (77 K) or with liquid neon around 30 K [8]. The outer iron yoke operates like a magnetic shield to limit the magnetic effects on the external environment.…”

Section: Introductionmentioning

confidence: 99%

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2D analytical modeling of a wholly superconducting synchronous reluctance motor

Male¹,

Lubin²,

Mezani³

et al. 2011

Supercond. Sci. Technol.

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An analytical computation of the magnetic field distribution in a wholly superconducting synchronous reluctance motor is proposed. The stator of the studied motor consists of three-phase HTS armature windings fed by AC currents. The rotor is made with HTS bulks which present the specificity to have a diamagnetic behavior under zerofield cooling. The electromagnetic torque is obtained by the interaction between the rotating magnetic field created by the HTS windings and the HTS Bulks. The proposed analytical model is based on the resolution of Laplace's and Poisson's equations (by the separation of variables technique) for each sub-domain, i.e. stator windings, air-gap, holes between HTS bulks and exterior iron shield. For the study, the HTS bulks are considered as perfect diamagnetic materials. The boundary and continuity conditions between each sub-domains yield to the global solution. Magnetic field distributions and electromagnetic torque obtained by the analytical method are compared with those obtained from finite element analyses.

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“…Over the last two decades, there has been significant research and development efforts in the area of High Temperature Superconducting (HTS) machines (motors and generators). 19 This effort has focused largely on submarine applications where, like rotorcraft, high specific torque is as important a requirement as high specific power. Today, HTS motors are being introduced for submarine applications of up to 35 MW of power.…”

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confidence: 99%

Requirements for a Hydrogen Powered All-Electric Manned Helicopter

Datta¹

2012

12th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference and 14th AIAA/ISSMO Multidisciplinary Analysis And

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The objective of this paper is to set propulsion system targets for an all-electric manned helicopter of ultra-light utility class to achieve performance comparable to combustion engines. The approach is to begin with a current two-seat helicopter (Robinson R 22 Beta II-like), design an all-electric power plant as replacement for its existing piston engine, and study performance of the new all-electric aircraft. The new power plant consists of highpressure Proton Exchange Membrane fuel cells, hydrogen stored in 700 bar type-4 tanks, lithium-ion batteries, and an AC synchronous permanent magnet motor. The aircraft and the transmission are assumed to remain the same. The paper surveys the state of the art in each of these areas, synthesizes a power plant using best available technologies in each, examines the performance achievable by such a power plant, identifies key barriers, and sets future technology targets to achieve performance at par with current internal combustion engines. Nomenclature

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High-Temperature Superconducting Synchronous Motors: Economic Issues for Industrial Applications

Cited by 33 publications

References 6 publications

Coupled Cryogenic Thermal and Electrical Models for Transient Analysis of Superconducting Power Devices with Integrated Cryogenic Systems

Coupled Cryogenic Thermal and Electrical Models for Transient Analysis of Superconducting Power Devices with Integrated Cryogenic Systems

2D analytical modeling of a wholly superconducting synchronous reluctance motor

Requirements for a Hydrogen Powered All-Electric Manned Helicopter

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