Material selection for the torque tubes of large superconducting rotating machinery

✍ Scribed by A. Bejan

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 310 KB
• Volume: 14
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(74)90107-6

✦ Synopsis

This report identifies properties to be considered when selecting materials used in construction of torque tubes for rotating superconducting field windings in electrical machinery.

The main design requirements are stated and the groups of material properties that influence directly the mechanical and thermal performance of a torque tube are derived.

Most desirable is a low thermal conductivity to modulus of elasticity ratio which governs the refrigeration expense and the tube wall aspect ratio (thickness/length). Numerical examples point out that fibrPreinforced plastics are potential candidates for use in torque tubes

Material selection for the torque tubes of large superconducting rotating machinery

A. Bejan

The use of superconductors in the windings of electric machinery, particularly in the rotating field winding of an ac generator, is regarded as a possible and immediate industrial application of superconductivity. The merits of this application have been stated in great detail. 1 The object of this report is to identify properties to be considered when selecting material used in construction of torque tubes for the rotating superconducting field windings in electrical machinery.