Three-Dimensional Magnetic Field Analysis of Electrodes for VCBs

Nitta, Koichi; Watanabe, Kenji; Kagenaga, K.; Mori, Toshiyuki; Kaneko, Eiji; Somei, H.; Takahashi, Hidekazu

doi:10.1109/tdc.1996.547585

Cited by 14 publications

(3 citation statements)

References 3 publications

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“…2. The magnetic flux density distribution was measured by Hall effect elements [5]. This shows a maximum value around the contact radius and a decrease toward the end of the electrode.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…The relationship between the arc behavior and the AMF distribution was researched with a view to increase interruption ability by preventing local heating of the electrode. A high‐speed video camera was used to observe the arc behavior, a high‐sensitivity charge‐coupled device (CCD) camera to measure the temperature distribution of the anode surface and a Hall effect element measurement system and three‐dimensional magnetic field calculation to determine the magnetic flux density distribution between electrodes [3–5]. The vacuum arc of an extremely high interruption current was diffused by the appropriate magnetic field distribution, unlike that of the conventional AMF distribution [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Arc behavior and interruption ability of uniform vacuum arc control technology and its application to vacuum interrupter

Niwa

Yokokura

Sasage

et al. 2011

IEEJ Transactions Elec Engng

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The vacuum arc characteristics and high current interruption ability of several different sized electrodes applied in the uniform vacuum arc control method named self arc diffusion by electrode (SADE) are presented. The arc behavior of the test electrode during the arcing period was observed by a high‐speed video camera. At extremely high interruption currents, the arc of the conventional axial magnetic field (AMF) electrode concentrates, causing local heating of the electrode. However, the arc of the SADE diffuses over the whole contact area thus avoiding local heating. The interruption ability of SADE is about twice as much as that of the conventional AMF for the same sized electrode. By applying this arc control method to vacuum circuit breaker (VCB), it can be made more compact and lighter than the conventional type. © 2011 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…2. The magnetic flux density distribution was measured by Hall effect elements [5]. This shows a maximum value around the contact radius and a decrease toward the end of the electrode.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Arc behavior and interruption ability of uniform vacuum arc control technology and its application to vacuum interrupter

Niwa

Yokokura

Sasage

et al. 2011

IEEJ Transactions Elec Engng

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“…[5] So AMF characteristics in the contact shown in Fig.1 need to be known. The objective of this paper is to analyze AMF characteristics of the slot type AMF contacts with iron plates shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Axial Magnetic Field of Slot Type Axial Magnetic Field Contacts with Iron Plates

Liu

Wang

et al. 2006

2006 International Symposium on Discharges and Electrical Insulation in Vacuum

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This paper introduces a new kind of slot type axial magnetic field (AMF) contact with iron plates. The objective of this paper is to analyze AMF characteristics of the new contact. The analysis was done by finite element method. Influence of iron plate parameters on AMF characteristics, such as axial magnetic flux density at current peak and current zero and phase shift time distribution, are shown. AMF characteristics of same contact without iron were analyzed for a comparison. It is found that a case gave the highest AMF 1.067T at current peak and its maximum AMF at current zero is 0.229T that is very close to the situation without iron 0.228T, while its phase shift time is as low as 0.6ms-1.6ms on the intermediate plane in contact gap. In this case parameters of iron plates are quantities of iron plates 12, inner diameter 16mm, outer diameter 46mm, height of iron plates 8mm and thickness of contact plates 3mm.

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