The decay properties of the trapped magnetic field in HTS bulk superconducting actuator by AC controlled magnetic field

Seok Beom Kim, Y. Uwani, J. H. Joo, R. Kawamoto, Y. S. Jo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The electric device applications of a high temperature superconducting (HTS) bulk magnet, having stable levitation and suspension properties according to their strong flux pinning force, have been proposed and developed. We have been investigating a three-dimensional (3-D) superconducting actuator using HTS bulks to develop a non-contract transportation device which moves freely in space. It is certain for our proposed 3-D superconducting actuator to be useful as a transporter used in a clean room where silicon wafers, which do not like mechanical contact and dust, are manufactured. The proposed actuator consists of the trapped HTS bulk as a mover and two-dimensionally arranged electromagnets as a stator. Up to now, the electromagnets consisted with iron core and copper coil were used as a stator, and each electromagnet was individually controlled using DC power supplies. In our previous work, the unstable movement characteristics of HTS bulk were observed under the DC operation, and the AC electromagnets driven with AC controlled current was proposed to solve these problems. In general, the trapped magnetic field in HTS bulk was decayed by a time-varying external magnetic field. Thus, it needs to optimize the shapes of AC electromagnets and operating patterns, the decay properties of the trapped magnetic field in the HTS bulk mover by the AC magnetic field should be cleared. In this paper, the influences of the frequency, the overall operating time, the strength of magnetization field and drive current against the decay of trapped magnetic field were experimentally studied using the fabricated AC electromagnets.

Original languageEnglish
Pages (from-to)1479-1482
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 2011

Fingerprint

trapped magnetic fields
Electromagnets
electromagnets
alternating current
Actuators
actuators
Magnetic fields
decay
magnetic fields
stators
Temperature
Stators
direct current
clean rooms
Flux pinning
Clean rooms
transporter
levitation
flux pinning
Silicon wafers

Keywords

  • AC magnetic field
  • Actuator
  • HTS bulk
  • Trapped magnetic field

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

The decay properties of the trapped magnetic field in HTS bulk superconducting actuator by AC controlled magnetic field. / Kim, Seok Beom; Uwani, Y.; Joo, J. H.; Kawamoto, R.; Jo, Y. S.

In: Physica C: Superconductivity and its Applications, Vol. 471, No. 21-22, 11.2011, p. 1479-1482.

Research output: Contribution to journalArticle

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