摘要
继电器在动作和载流时,其接触系统、电流线圈和金属导电体均为其典型发热部件。在温升超过一定范围后,继电器金属材料的机械强度及绝缘材料的绝缘强度都会降低。若长期工作温度过高,继电器寿命则会减少,甚至失效,进而影响整个电器系统的稳定性。因此,对继电器内部典型发热部件进行热特性分析十分重要。本文采用COMSOL Multiphysics有限元仿真软件,完成了无壳和有壳下线圈恒定通电时,电磁继电器温度场的仿真。通过与实验数据结合等方法,保证了仿真精度,确定了该实验条件下各部件的散热系数。仿真结果与实测数据最高偏差仅为2.10℃。本文研究为之后的仿真研究打下基础,同时也证明了所提出仿真方法的可靠性。
When a relay is working normally, thetemperatures of its contact system, coil and the metal conductorwill be above a certain range, which will make the mechanical strength of the metal material and the dielectric strength of the insulation material reduce. And all these influences will reduce the service life of the relay greatly. Therefore, it is very necessary to analyze the heat of these components. In this paper, the simulation of electromagnetic relay temperature field is carried out by COMSOL Multiphysics finite element simulation software. By combining with experimental data, the simulation precision is guaranteed and the heat dissipation coefficient of each part is determined. This paper lays the foundation for the simulation study and proves the reliability of the simulation method.
作者
李丹
张代润
杨林
Li Dan;Zhang Dairun;Yang Lin(School of Electrical Engineering and Information, Sichuan University, Chengdu 610000)
出处
《电气技术》
2018年第3期26-30,共5页
Electrical Engineering
关键词
电磁继电器
温升
发热特性
热时间常数
稳定温升
electromagnetic relay
temperature rise
thermal characteristics
thermal time constant
steady temperature rise
