Design, Fabrication, and Testing of the Aliss Superconducting Mine-Countermeasures Magnet

Heiberger, M.; Langhorn, A.; Creedon, W. P.; Chapelle, S.; Guzmán, Roger; Harris, T.E.; Morris, David G.; Medrano, J. E.; Tannenbaum, J. M.; Golda, Michael; Fikse, T. H.; Waltman, D.J.; Green, G. F.; Chafe, J. N.; Walters, J. D.; Prenger, C.

doi:10.1007/978-1-4757-9047-4_16

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…A special CTWS was developed for the SSM based on the ALISS magnet design [1]. The function of the CTWS is to position the coil in close axial proximity to the rotor and to carry the large mechanical loads inherent to the motor while providing high strength and stiffness.…”

Section: Cold To Warm Support Structure (Ctws)mentioning

confidence: 99%

Development of a Superconducting Magnet System for the ONR/General Atomics Homopolar Motor

Schaubel¹,

Langhorn²,

Creedon³

et al. 2006

AIP Conference Proceedings

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Section: Cold To Warm Support Structure (Ctws)mentioning

confidence: 99%

Development of a Superconducting Magnet System for the ONR/General Atomics Homopolar Motor

Schaubel¹,

Langhorn²,

Creedon³

et al. 2006

AIP Conference Proceedings

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“…Second, although the liquid metal current collectors met all performance requirements during the at sea testing, it was realized, that a long term endurance test incorporating all full-scale motor operating conditions would be necessary to convincingly demonstrate the reliability of the current collector system. Several of these liquid cryogen-free magnet systems have been built in the United States by General Electric, General Atomic, and Applied Superconetics (Heiberger et al, 1996;Heiberger et al, 1997;Obasih & Mruzek, 1996;Heiberger et al, 1998). Many of these magnet systems are geometrically larger than those required for propulsion motors (Heiberger et al, 1997;Obasih & Mruzek, 1996).…”

Section: Progress Of Component Technologiesmentioning

confidence: 99%

“…His present application focus is in developing liquid cryogen free rugged superconducting magnet systems for shallow water mine sweeping and electric propulsion motors. -1998Vice-Chairman, ASNE Flagship Section, and served as the 1996…”

mentioning

confidence: 99%

Reexamination of Superconductive Homopolar Motors for Propusion

Walters

Sondergaard

Levedahl

et al. 1998

Naval Engineers Journal

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Superconducting homopolar motor concepts with accompanying auxiliary systems have been examined in a quick‐look assessment for their impact on ship designs utilizing the Navy's Advanced Surface Ship Evaluation Tool (ASSET) developed by the Naval Surface Warfare Center Carderock Division. An existing ASSET DDG51‐FLT2A “like” ship model was used as a convenient means of evaluating the ship impact of the superconducting homopolar, and other advanced electric propulsion systems. For simplicity, all ship impact benefits due to increased power density and efficiency are taken in increased fuel capacity and thus, increased ship operating range. Previous studies have shown that superconducting homopolar motors are well suited to Navy propulsion systems due to their inherent low noise generation, high power density, and efficiency. Homopolar motors are the only true direct current electrical motors and produce very smooth torque because they have no magnetic field pulsations or alternating currents. The Annapolis Laboratory of the Naval Surface Warfare Center is reexamining superconducting homopolar motor technology in light of the resurgent interest in a more electric Navy and because of significant advancements in two key homopolar component technologies. Extensive development of mechanical cryogenic refrigerators has resulted in liquid cryogen‐free superconducting magnets. Magnet systems utilizing cryogen‐free technology have been kept at superconducting temperatures for over two years (18,000 hrs.) with no maintenance. Development of dry copper‐fiber and multiple‐foil copper brushes has eliminated the need for liquid metal current collectors used in early homopolar motors. Basic wear measurements imply replacement times of tens of thousands of full‐power motor hours. Superconductive homopolar motor designs utilizing the new solid collectors are comparable in size to those for previous designs, and show only small increases in machine size as voltage increases from 200V to 2,000V As a result, the operating voltage of a homo‐polar machine can now be selected on an overall system basis in the same way as conventional alternating current systems. Advances in these key technologies and the promising results of the ship impact assessments indicate that a closer examination of superconducting homopolar motors for propulsion is warranted.

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Tailoring of insulation and adhesives for superconducting magnets and devices

Tupper

Munshi²

1999

IEEE Trans. Appl. Supercond.

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Design, Fabrication, and Testing of the Aliss Superconducting Mine-Countermeasures Magnet

Cited by 3 publications

References 2 publications

Development of a Superconducting Magnet System for the ONR/General Atomics Homopolar Motor

Development of a Superconducting Magnet System for the ONR/General Atomics Homopolar Motor

Reexamination of Superconductive Homopolar Motors for Propusion

Tailoring of insulation and adhesives for superconducting magnets and devices

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