Analysis of Degradation Sensitive Characteristics of Switch Power Supply Based on Electro Thermal Coupling Simulation
As a high reliability and long life product, the output performance parameters of switch power supply often fail to reflect its real degradation state, which causes sudden failure phenomenon in its working process.To address this problem, a degradation sensitive characteristic analysis method based on electro-thermal coupling simulation is proposed to excavate the real degradation sensitive characteristic parameters in the space-borne power supply accurately, which fully takes into account the electro-thermal coupling effect between the temperature and components caused by the self-heating, and this method accurately simulates the real working state of the power supply.Firstly, the circuit simulation model of power supply is established by Saber.Secondly, the steady-state thermal field simulation model of power supply is constructed by finite element simulation analysis method.Then the electric-thermal simulation is integrated by iSIGHT to realize the automatic interaction of electric-thermal coupling simulation data.Finally, through the multi-parameter sensitivity analysis, the influence of the internal components and materials degeneration is obtained, and the sensitive parameters reflecting the degradation characteristics are determined.A case study of a certain type switch power supply fully demonstrates the effectiveness and feasibility of the proposed method.At the same time, this proposed method also greatly contributes to the degradation monitoring, fault diagnosis and reliability assessment of switch power supply.
Switch power supply Electro-thermal coupling simulation Multi-parameter sensitivity analysis Degradation sensitive characteristics Degradation state
Yifan Hu Rui Feng Xuerong Ye Sirui Liu Guofu Zhai
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150001,China
国际会议
江苏苏州
英文
341-347
2019-11-04（万方平台首次上网日期，不代表论文的发表时间）