Abstract
This paper mainly introduces the low voltage power supply system and its principle for a metro vehicle in an overseas project. The abbreviation of low voltage power supply is LVPS. Focusing on the efficiency of LVPS under the highest and the lowest limit input voltage. when the loads change, analyse the efficiency characteristics of low voltage power supply. It can enable us to have a deep understanding of the working efficiency characteristics and provide reference for the design and selection of low voltage power supply.
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