Considerations of Leakage Flux Effect on a Long Time-Constant of a Transient Eddy Current in Solid-Iron Electromagnet.
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Accession number;99A1045391
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| Title;Considerations of Leakage Flux Effect on a Long Time-Constant of a Transient Eddy Current in Solid-Iron Electromagnet. |
| Author;
SATO K
(Osaka Univ., Osaka, Jpn)
NAKAI J
(Osaka Univ., Osaka, Jpn)
MOCHIHASHI A
(Osaka Univ., Osaka, Jpn)
NINOMIYA S
(Osaka Univ., Osaka, Jpn)
TAKAHASHI Y
(Osaka Univ., Osaka, Jpn)
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Journal Title;Proc Symp Accel Sci Technol
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Journal Code:F0512B
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ISSN:0914-2789
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VOL.12th;NO.;PAGE.75-77(1999)
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| Figure&Table&Reference;REF.3 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Leakage flux of an electromagnet is considered to shorten a gap length effectively which dominates a strength of a magnetic flux density in an iron core. Because a transient eddy current occurs inside an iron core, its time constant becomes longer when the leakage flux is larger. In addition, the leakage flux is larger when the permeability of a core is larger. A leakage flux ratio is usually several times as much as unity; so that a time constant is several times longer in comparison with that of a simple case of no leakage flux. An analytical expression for a transient eddy current is formulated by two-dimensional simultaneous Laplace's transformation for space and time. This expression makes clear that a transient eddy current causes a spatial distribution of a flux density both at a gap and inside a core with long time constant. (author abst.) |
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