快速分断有机物型温度熔断器的设计与实现

Design and Implementation of Fast-Breaking Organic Thermal Fuse

为解决现有有机物型温度熔断器分断速度缓慢、直流分断能力较低的问题,设计了一种具有快速分断能力的有机物型温度熔断器。通过引入触头驱动件,使其与弹簧动作配合,将热敏药丸缓慢熔化过程转化为动触头快速分断动作,以提高有机物型温度熔断器的直流分断能力,使其适用于直流电路的温度保护。通过多体动力学仿真探究弹簧对动触头的运动速度影响,指导样机参数设计,并制作温度熔断器样机,进行触头分断速度测试以及直流负载分断实验。结果证明,所设计的温度熔断器具有较高的分断速度,具备一定的直流分断能力。

In order to solve the problems of slow breaking speed and low DC breaking capacity of the existing organic thermal fuse,an organic thermal fuse with high breaking speed is designed.By introducing a contact driving part,cooperated with the springs the slow melting process of the thermal-sensitive is converted into the fast breaking action of the moving contact to improve the DC breaking capacity of the organic thermal fuse and make it applicable for DC circuit temperature protection.The influence of the springs on the moving speed of the moving contact is explored through the multibody dynamics simulation to guide the design of the prototype.Finally,the prototype of the thermal fuse is fabricated.The contact breaking speed test and DC load breaking experiment are carried out.The results prove that the designed thermal fuse has high breaking speed and certain DC breaking capacity.