城市轨道交通装备的双向直流接触器灭弧方式比较
李宏
Comparison of Arc-blowout Solutions on Bi-direction DC Contactor in Urban Rail Transit Equipment
LI Hong
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作者信息:西安沙尔特宝电气有限公司， 710100， 西安
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Affiliation:Xi′an Schaltbau Electric Co., Ltd., 710100, Xi′an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.04.040
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中图分类号/CLCN:TM572.1
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栏目/Col:应用技术
摘要:
城市轨道交通装备的中低压双向直流接触器带负载分断性能，故对灭弧技术提出很高要求，其中对临界电流的分断是技术难点。针对双向直流工况，详细阐述了传统灭弧方式和新型灭弧方式的灭弧原理和优缺点，着重介绍了新型灭弧方式不同外加磁场布置的特殊作用。通过模拟试验比较了部分灭弧方式的燃弧时间，并评价了采用不同灭弧方式接触器的性能及适用性。模拟试验结果及评价结果均表明，新型灭弧方式具有更好的灭弧性能，是双向直流接触器的更好选择。
Abstracts:
The breaking capacity with load of medium-low voltage bi-directional DC contactors is putting forward high demand for arc-blowout technology, of which the critical current breaking is the technical difficulty. Targeting the working condition of bi-directional DC, the principle, merits and demerits of the conventional and new arc-blowout solutions are expounded. The difference of the new arc-blowout solution and the special function of external magnetic field are introduced emphatically. The arc burning time of some arc-blowout solutions are compared through simulation experiments. The performance and applicability of contactors adopting different arc-blowout solutions are evaluated. Simulation experiment results and evaluation results show that the new arc-blowout solution performs better, and is a better choice for bi-directional DC contactors.
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