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An electrical arc is generated by opening the contacts of a relay when the current is above the minimum arc current in a circuit. A magneto-hydrodynamic (MHD) model was employed to simulate this dynamic arcing process. The distributions of arc parameters such as temperature, electrical field and magnetic flux density generated by opening the contacts in a circuit with a 5 A DC low current were obtained. The behaviors of the arc parameters with increasing gap length between the contacts were also simulated. The MHD model was then combined with structured dynamic layering, which is a dynamic meshing technique of computational fluid dynamics (CFD) to calculate the dynamic arcing process, and the arc parameters generated by opening the contacts in the circuit with a 5 A DC low current with a constant velocity were also obtained. It turned out that the computed time-varying contact voltage and arc duration agreed well with the test results. Thus, the validity of the simulation was demonstrated.

- Publication
- IEICE TRANSACTIONS on Electronics Vol.E91-C No.8 pp.1233-1239

- Publication Date
- 2008/08/01

- Publicized

- Online ISSN
- 1745-1353

- DOI
- 10.1093/ietele/e91-c.8.1233

- Type of Manuscript
- Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007))

- Category
- Arc Discharge & Related Phenomena

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Guofu ZHAI, Xue ZHOU, "Study on Arc Generated by Opening Electromagnetic Relay Contacts in DC Low-Current Resistive Circuit with Constant Velocity" in IEICE TRANSACTIONS on Electronics,
vol. E91-C, no. 8, pp. 1233-1239, August 2008, doi: 10.1093/ietele/e91-c.8.1233.

Abstract: An electrical arc is generated by opening the contacts of a relay when the current is above the minimum arc current in a circuit. A magneto-hydrodynamic (MHD) model was employed to simulate this dynamic arcing process. The distributions of arc parameters such as temperature, electrical field and magnetic flux density generated by opening the contacts in a circuit with a 5 A DC low current were obtained. The behaviors of the arc parameters with increasing gap length between the contacts were also simulated. The MHD model was then combined with structured dynamic layering, which is a dynamic meshing technique of computational fluid dynamics (CFD) to calculate the dynamic arcing process, and the arc parameters generated by opening the contacts in the circuit with a 5 A DC low current with a constant velocity were also obtained. It turned out that the computed time-varying contact voltage and arc duration agreed well with the test results. Thus, the validity of the simulation was demonstrated.

URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e91-c.8.1233/_p

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@ARTICLE{e91-c_8_1233,

author={Guofu ZHAI, Xue ZHOU, },

journal={IEICE TRANSACTIONS on Electronics},

title={Study on Arc Generated by Opening Electromagnetic Relay Contacts in DC Low-Current Resistive Circuit with Constant Velocity},

year={2008},

volume={E91-C},

number={8},

pages={1233-1239},

abstract={An electrical arc is generated by opening the contacts of a relay when the current is above the minimum arc current in a circuit. A magneto-hydrodynamic (MHD) model was employed to simulate this dynamic arcing process. The distributions of arc parameters such as temperature, electrical field and magnetic flux density generated by opening the contacts in a circuit with a 5 A DC low current were obtained. The behaviors of the arc parameters with increasing gap length between the contacts were also simulated. The MHD model was then combined with structured dynamic layering, which is a dynamic meshing technique of computational fluid dynamics (CFD) to calculate the dynamic arcing process, and the arc parameters generated by opening the contacts in the circuit with a 5 A DC low current with a constant velocity were also obtained. It turned out that the computed time-varying contact voltage and arc duration agreed well with the test results. Thus, the validity of the simulation was demonstrated.},

keywords={},

doi={10.1093/ietele/e91-c.8.1233},

ISSN={1745-1353},

month={August},}

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TY - JOUR

TI - Study on Arc Generated by Opening Electromagnetic Relay Contacts in DC Low-Current Resistive Circuit with Constant Velocity

T2 - IEICE TRANSACTIONS on Electronics

SP - 1233

EP - 1239

AU - Guofu ZHAI

AU - Xue ZHOU

PY - 2008

DO - 10.1093/ietele/e91-c.8.1233

JO - IEICE TRANSACTIONS on Electronics

SN - 1745-1353

VL - E91-C

IS - 8

JA - IEICE TRANSACTIONS on Electronics

Y1 - August 2008

AB - An electrical arc is generated by opening the contacts of a relay when the current is above the minimum arc current in a circuit. A magneto-hydrodynamic (MHD) model was employed to simulate this dynamic arcing process. The distributions of arc parameters such as temperature, electrical field and magnetic flux density generated by opening the contacts in a circuit with a 5 A DC low current were obtained. The behaviors of the arc parameters with increasing gap length between the contacts were also simulated. The MHD model was then combined with structured dynamic layering, which is a dynamic meshing technique of computational fluid dynamics (CFD) to calculate the dynamic arcing process, and the arc parameters generated by opening the contacts in the circuit with a 5 A DC low current with a constant velocity were also obtained. It turned out that the computed time-varying contact voltage and arc duration agreed well with the test results. Thus, the validity of the simulation was demonstrated.

ER -