一种新型低压断路器过流检测方案  

Novel measuring method for over current characteristic of low voltage circuit breakers

作　　者：张昊[1] 谢秋慧[1] 蔡春皓[1] 傅培刚[1] 赵勇[1] 郑轮 

机构地区：[1]上海出入境检验检疫局,上海200002

出　　处：《机电工程》2015年第2期285-289,共5页Journal of Mechanical & Electrical Engineering

摘　　要：针对低压断路器的过流脱扣检测过程中稳定性差、设备寿命短、功耗高等问题,对检测设备中的电源技术和空压机结构问题进行了研究,提出了一种基于数控恒流源和新型压机结构的低压断路器过流检测方案。对检测系统电气结构和控制信号框图进行研究,提出一种基于数字有效值算法的电流PID控制算法。对检测过程中的设备功耗问题进行了研究,提出了一种具有较短电流传输路径的新型压机结构。在数控电源和压机结构两方面技术内容结合的基础上,设计了新型低压断路器过流检测平台,对平台试验波形、实物照片和压机结构工程图进行了介绍。利用新型平台上进行了低压断路器过流检测试验。研究结果表明,该方案相比传统的机械化调压检测方法,具有更高精度、更高可靠性和更低功耗的效果。Aiming at the problems of poor stability, short service life and high power consumption in the traditional equipments measuring over-current characteristic for low voltage circuit breaker, the digital controlled power supply technology and a novel machinery structure was investigated. Based on two technology above, a novel measuring method for over current characteristic test was proposed. After the analysis of electrical circuit diagram, the relationship between the scheme and the mathematical model was established and a method base on digital root mean square algorithm for current regulation was presented. The novel machinery structure was proposed for low power consumption. The equipment designed by the proposed measuring method were evaluated on the two aspects above ： power supply technology and machinery structure. A few diagrams of experimental waveforms, a picture of the hardware circuit and an engineering drawings of machinery structure were given. The over current inspection test of low voltage circuit breakers was tested by the proposed equipment. The experimental results indicate that the accuracy, stability and life time of the proposed equipment are better than the traditional ones.

关 键 词：低压断路器过流检测 数控电源 

分 类 号：TM561[电气工程—电器] TP24[自动化与计算机技术—检测技术与自动化装置]