Liquid-metal sliding electrical contacts for homopolar motors and generators

Nancy Ma; John Walker; Gita Talmage; Samuel H. Brown; Neal Sondergaard

Liquid-metal sliding electrical contacts for homopolar motors and generators

Nancy Ma, John Walker, Gita Talmage, Samuel H. Brown, Neal Sondergaard

University of Illinois at Urbana-Champaign

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

An extremely large dc electric current must flow between the tips of rotors which are moving at high speed and stator surfaces which are at rest. A liquid metal in the small radial gap between the rotor tip and the concentric stator surface provides an ideal electrical contact because of its large electrical conductivity and small viscosity. Since the sliding electrical contacts are in regions where the magnetic field is strong, the motion of the liquid metal is a magnetohydrodynamic flow. A through understanding of this flow is needed in order to minimize the voltage drop and energy losses in contacts. This paper reviews recent efforts to develop models which provide the needed understanding.

Original language	English
Title of host publication	Proceedings of the Third (1993) International Offshore and Polar Engineering Conference
Publisher	Publ by Int Soc of Offshore and Polar Engineerns (ISOPE)
Pages	39-45
Number of pages	7
ISBN (Print)	1880653060
State	Published - 1993
Externally published	Yes
Event	Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) - Singapore, Singapore Duration: Jun 6 1993 → Jun 11 1993

Publication series

Name	Proceedings of the Third (1993) International Offshore and Polar Engineering Conference

Conference

Conference	Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4)
City	Singapore, Singapore
Period	06/6/93 → 06/11/93

Cite this

Ma, N., Walker, J., Talmage, G., Brown, S. H., & Sondergaard, N. (1993). Liquid-metal sliding electrical contacts for homopolar motors and generators. In Proceedings of the Third (1993) International Offshore and Polar Engineering Conference (pp. 39-45). (Proceedings of the Third (1993) International Offshore and Polar Engineering Conference). Publ by Int Soc of Offshore and Polar Engineerns (ISOPE).

Ma, Nancy ; Walker, John ; Talmage, Gita et al. / Liquid-metal sliding electrical contacts for homopolar motors and generators. Proceedings of the Third (1993) International Offshore and Polar Engineering Conference. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), 1993. pp. 39-45 (Proceedings of the Third (1993) International Offshore and Polar Engineering Conference).

@inproceedings{878aa3bba00447ff80aa83ca3a837d7a,

title = "Liquid-metal sliding electrical contacts for homopolar motors and generators",

abstract = "An extremely large dc electric current must flow between the tips of rotors which are moving at high speed and stator surfaces which are at rest. A liquid metal in the small radial gap between the rotor tip and the concentric stator surface provides an ideal electrical contact because of its large electrical conductivity and small viscosity. Since the sliding electrical contacts are in regions where the magnetic field is strong, the motion of the liquid metal is a magnetohydrodynamic flow. A through understanding of this flow is needed in order to minimize the voltage drop and energy losses in contacts. This paper reviews recent efforts to develop models which provide the needed understanding.",

author = "Nancy Ma and John Walker and Gita Talmage and Brown, {Samuel H.} and Neal Sondergaard",

year = "1993",

language = "English",

isbn = "1880653060",

series = "Proceedings of the Third (1993) International Offshore and Polar Engineering Conference",

publisher = "Publ by Int Soc of Offshore and Polar Engineerns (ISOPE)",

pages = "39--45",

booktitle = "Proceedings of the Third (1993) International Offshore and Polar Engineering Conference",

note = "Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) ; Conference date: 06-06-1993 Through 11-06-1993",

}

Ma, N, Walker, J, Talmage, G, Brown, SH & Sondergaard, N 1993, Liquid-metal sliding electrical contacts for homopolar motors and generators. in Proceedings of the Third (1993) International Offshore and Polar Engineering Conference. Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), pp. 39-45, Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4), Singapore, Singapore, 06/6/93.

Liquid-metal sliding electrical contacts for homopolar motors and generators. / Ma, Nancy; Walker, John; Talmage, Gita et al.
Proceedings of the Third (1993) International Offshore and Polar Engineering Conference. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE), 1993. p. 39-45 (Proceedings of the Third (1993) International Offshore and Polar Engineering Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Liquid-metal sliding electrical contacts for homopolar motors and generators

AU - Ma, Nancy

AU - Walker, John

AU - Talmage, Gita

AU - Brown, Samuel H.

AU - Sondergaard, Neal

PY - 1993

Y1 - 1993

N2 - An extremely large dc electric current must flow between the tips of rotors which are moving at high speed and stator surfaces which are at rest. A liquid metal in the small radial gap between the rotor tip and the concentric stator surface provides an ideal electrical contact because of its large electrical conductivity and small viscosity. Since the sliding electrical contacts are in regions where the magnetic field is strong, the motion of the liquid metal is a magnetohydrodynamic flow. A through understanding of this flow is needed in order to minimize the voltage drop and energy losses in contacts. This paper reviews recent efforts to develop models which provide the needed understanding.

AB - An extremely large dc electric current must flow between the tips of rotors which are moving at high speed and stator surfaces which are at rest. A liquid metal in the small radial gap between the rotor tip and the concentric stator surface provides an ideal electrical contact because of its large electrical conductivity and small viscosity. Since the sliding electrical contacts are in regions where the magnetic field is strong, the motion of the liquid metal is a magnetohydrodynamic flow. A through understanding of this flow is needed in order to minimize the voltage drop and energy losses in contacts. This paper reviews recent efforts to develop models which provide the needed understanding.

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M3 - Conference contribution

AN - SCOPUS:0027211317

SN - 1880653060

T3 - Proceedings of the Third (1993) International Offshore and Polar Engineering Conference

SP - 39

EP - 45

BT - Proceedings of the Third (1993) International Offshore and Polar Engineering Conference

PB - Publ by Int Soc of Offshore and Polar Engineerns (ISOPE)

T2 - Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4)

Y2 - 6 June 1993 through 11 June 1993

ER -

Ma N, Walker J, Talmage G, Brown SH, Sondergaard N. Liquid-metal sliding electrical contacts for homopolar motors and generators. In Proceedings of the Third (1993) International Offshore and Polar Engineering Conference. Publ by Int Soc of Offshore and Polar Engineerns (ISOPE). 1993. p. 39-45. (Proceedings of the Third (1993) International Offshore and Polar Engineering Conference).

Liquid-metal sliding electrical contacts for homopolar motors and generators

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