Load Characteristics of Low Power Step-Down Transformer in Liquid Nitrogen
Georgi Ivanov, Valentin M. Mateev, Iliana Marinova · 2024
In this paper testing of a low power transformer in liquid nitrogen is presented. Transformer is cooled to 77 Kin order to reduce electric losses and increase efficiency and rated power. A center tapped step-down transformer is tested. Transformer rated parameters at room temperature are$\mathrm{U}_{1}= 220 V, \mathrm{U}2 =6 V, 12 =500\text{mA}$. The transformer load characteristics are tested at room temperature and liquid nitrogen temperature environment. Measured results for V-A characteristics for variable load, electric power loss and efficiency are obtained and discussed.