Up to now, it is difficult to test the inner temperatures of sealed electromagnetic relay. This paper presents a thermal and electrical coupled-field simulation method for thermal analysis of sealed electromagnetic relays. In order to improve the accuracy of simulation, the contact radius is calculated in advance. The relationship between convection heat transfer coefficient and temperature and how to consider connecting wires boundary condition are also researched here. Finally, the temperature distribution of a sealed electromagnetic relay is obtained by this method. Comparisons with experimental results prove its validation.
展开▼
