一种节电式大电流转动式交流接触器的设计

Design of an energy-saving large-current rotational AC contactor

交流接触器是一种广泛应用于低压配电系统中控制交流电动机起动、停止和反转的元器件,通过控制交流接触器电磁线圈的通断电来控制动静铁芯之间的吸合与断开,从而使动静触头闭合或分开,随之接通或断开电路。交流接触器在工业领域使用广泛,很多大电流交流接触器每日工作时间均在八小时以上,故其总能耗巨大。对目前常见的几种交流接触器的节能方式进行了分析和比较,发现大电流转动式交流接触器在节能方面的研究和应用存在很大欠缺。在分析交流接触器工作过程中主要能量损失和提出改进建议的基础上,设计了一种针对大电流转动式交流接触器的节能方案。

The AC eontaetor is a component that is widely used in the low-voltage distribution system to control the starting, stopping and reversing of an AC motor. During operating an AC eontaetor, the moving iron cores or the stationary iron cores are turned on or turned off to control the moving contacts or stationary contacts closed or separated, thus the switching-on or switching-off of the electrical circuit is achieved. Since AC eontaetors are widely used in the industrial fields, many high-current AC eontaetors work more than eight hours per day, and the total energy eonsumption is pretty huge. Several ecommon AC eontaetor energy-saving method are analyzed and compared, and it is found that the research and application of high-current rotating AC eontaetors in energy saving field is very lacking. Based on the analysis of the main energy loss processes of the working AC eontaetors, some improventent suggestions are presented, and an energy-saving scheme for large-emTent rotational AC eontaetors is designed.