Development of A Temperature Rise Test System Based on The New Technology of Switching Power Supply Control

In the current failure analysis of rail vehicles, the aging of electrical components, the reduction of reliability and various direct and indirect failures caused by temperature rise account for a very high proportion. They have the characteristics of complex effects, hidden and changeable, unobvious initial phenomena, slow accumulation and development, which makes failure analysis and diagnosis very difficult. In order to meet the needs of in-depth research and systematic testing of the temperature rise characteristics and related effects of various electrical components used in vehicle systems, a set of low resistance circuit temperature rise test system is developed. This paper introduces the working principle, system composition and functions of the test system. The test system is technologically advanced, reliable, safe, easy to operate and flexible. It is of great significance for the temperature rise and temperature control of electrical components in the actual working environment and conditions of vehicles.