Long-life Reliability Optimization Design of Highpower DC Electromagnetic Relay Considering Thermal Degradation
As a key component in load control circuits, high-power electromagnetic relay (EMR) has been widely used in aviation and weaponry.However, due to the absence of arc-extinguishing structure in the relay,the arc-burning heat is severe under high-power DC load.Under the influence of high temperature, the properties of magnetic material and reed material will generate thermal degradation inevitably, resulting in electromagnetic force and mechanical force declining in different degrees.For products with poor design, the decline of the pull-in and release capacity will lead to the failure of the relay directly, or the failure of the life such as ablative bonding of contact.Therefore, it is important to ensure the reliable life of the suction-reaction force with sufficient thermal degradation margin in the design and optimization process of high-power relays.In this paper, the failure mechanism of electrical life is first analyzed through the thermal simulation and test under the 25A DC relay.Then the thermal degradation characteristics of magnetic material and reed material is taken into account.And the action characteristics of the relay at high temperature is improved by optimizing the suction reaction characteristics, thereby improving the electrical life of the high-power DC relay.Finally, the correctness of the optimization scheme is verifiedthroughthe actual manufacture and test of the FMR.
Failure mechanism analysis Electrical life optimization High-power electro-magnetic relay
Jie Deng Hongliang Xu Guofu Zhai
Harbin Institute of Technology, Harbin, 150001, China
国际会议
江苏苏州
英文
316-321
2019-11-04（万方平台首次上网日期，不代表论文的发表时间）