Conceptual design of a high temperature superconducting generator

Singh, Shweta; Scherbarth, D.W.; Ortoli, E.S.; Repp, J.R.; Christianson, O. R.; Parker, James; Carr, Jr W. J.; Gamble, B.

doi:10.1109/77.783524

Cited by 11 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the best way to enhance the power density is to increase the value of the airgap field, and this could be achieved by using a superconducting excitation. Many projects have been developed in the world in order to develop both a superconducting generator and a superconducting motor, but in most of these programs the geometry has been based on radial generators [2][3][4][5]. All of these approaches show brilliantly the feasibility of a superconducting generator, but some drawbacks are eventually linked to the fact that the low temperature area must be guaranteed in the moving part of the generator.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance of a High Temperature Superconducting Axial Flux Generator

2013

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Design and Performance of a High Temperature Superconducting Axial Flux Generator

2013

View full text Add to dashboard Cite

show abstract

“…1973; Hull et al, 1999;Leupold et al, 1988;Miller et al, 1994;Singh et al, 1999;Turk, 1989;Vajda et al, 1999). Figure 1 shows the rotor and stator assembly in a conceptual design of a superconducting generator.…”

mentioning

confidence: 99%

Characteristics of Steady and Transient Superfluid Transport for the Cooling of Superconducting Rotating Machines

Chuang¹

2003

The International Journal of Rotating Machinery

View full text Add to dashboard Cite

The unique properties of superfluid helium (He II) make it a very efficient cooling agent for superconducting rotating machines. Steady and transient transport characteristics and design formulas for the cooling of superconducting windings are enumerated in this article. Several superfluid transport analytical models and useful design equations are discussed: laminar flow; turbulent flow; and pure superfluid flow under steady-state and transient conditions. An effort was made to consolidate all analytical models and experimental results into a common framework. Under conditions of steady He II transport, a dimensionless heat flux number N q , a dimensionless driving force number N ∇T , and a characteristic length where used so that a generalized equation could be derived to describe superfluid transport in any geometry. In the case of transient transport of He II, a dimensionless heat flux number N q * and a dimensionless driving time number N t were used so that a generalized equation could be derived to describe transient superfluid transport in laminar flow and turbulent regimes. Many experimental data were compiled to substantiate the analysis.Large-scale superconducting magnets are expected to play a major role in future energy systems (Aized et al., 1999;Brechna, . Figure 1 shows the rotor and stator assembly in a conceptual design of a superconducting generator. Aized (1999) described the development of a 1000 hp superconducting motor in which the field winding is made of a superconductor that is cooled by means of closed-cycle helium refrigeration. The stator winding is watercooled by embedded cooling tubes. Vajda (1999) demonstrated the design and construction of an experimental superconducting synchronous machine. It has a permanent magnet rotor and a superconducting stator. Magnets of this type permit the construction of lightweight motors and generators that have obvious advantages for marine and airborne use. There is growing interest in using a superfluid as the coolant in superconducting rotating machines like superconducting motors and generators because of its unique and favorable cooling characteristics. Phenomena that tie directly into the safety and reliability of such superconducting windings are characterized by the thermodynamics of quasi-steady heat transfer and transient heat transfer to liquid helium (He II) during superconductor-coolant interaction. Superfluid heat transport presents many advantages: (1) Higher thermal stability due to lower operating temperatures;(2) higher heat conductivity, which reduces the generation of unfavorable vapor bubbles between windings; (3) insensitivity to winding orientation, which allows for flexibility in the geometry of the winding design. These advantages must be balanced against the added refrigeration requirement and the higher cost as compared with other cooling systems. For example, Kovalev (1998) reported two types of high-temperature superconducting alternators cooled by liquid hydrogen.Many investigators have compiled data concerning the cool...

show abstract

“…Tab. In 1986, the discovery of HTS inspired superconducting generators research upsurge again [12][13][14] .In the early 80s, due to the technology and funds etc., some country which preparation or already in the development of large superconducting generators will be suspended the development of superconducting generators, but the above superconducting generators research laid a good foundation for the follow-up work. The further development of HTS wire technology, as well as the formation of large piece of bulk technology brings to the research power of HTS generator.…”

mentioning

confidence: 99%

State-of-the Art and Perspectives of Superconducting Generator

Zhao

2013

AMM

View full text Add to dashboard Cite

Based on low temperature superconducting (LTS) & high temperature superconducting (HTS) material classification, the superconducting generators can be divided into LTS generators and HTS generators. The research status and characteristics of superconducting generators are summarized; and several topological structures of superconducting generators are introduced. Compared and studied traditional rotating machine with superconducting rotating machine, pointing out the present superconducting generators bottleneck problems. Finally, the prospects of the development of superconducting generators are described.

show abstract

Conceptual design of a high temperature superconducting generator

Cited by 11 publications

References 3 publications

Design and Performance of a High Temperature Superconducting Axial Flux Generator

Design and Performance of a High Temperature Superconducting Axial Flux Generator

Characteristics of Steady and Transient Superfluid Transport for the Cooling of Superconducting Rotating Machines

State-of-the Art and Perspectives of Superconducting Generator

Contact Info

Product

Resources

About