TY - JOUR TI - The influence of cryogenic temperatures on the characteristics of a brushless motor AU - Kapelski, Dariusz AU - Jankowski, Bartosz AU - Przybylski, Marek AU - Ślusarek, Barbara TI - The influence of cryogenic temperatures on the characteristics of a brushless motor AB - This article presents the results of a study on the magnetic properties of soft magnetic powder composites at room temperature and at liquid nitrogen temperature. The properties of a magnetoelectric motor with the power of 0.75 kW at room temperature and cryogenic temperatures are also presented in this article. The study of magnetic properties showed that magnetization curves at 20°C and -195.8°C temperatures are almost the same. Iron loss in the composite at liquid nitrogen temperature increased significantly in comparison to loss at room temperature. The study of the magnetoelectric motor showed that the back electromotive force at liquid nitrogen temperature decreases insignificantly in comparison to the back electromotive force at room temperature. Electromagnetic torque at liquid nitrogen temperature increases in comparison to room temperature. VL - 2015 IS - Elektrotechnika Zeszyt 1-E (8) 2015 PY - 2015 SN - 0011-4561 C1 - 2353-737X SP - 281 EP - 289 DO - 10.4467/2353737XCT.15.049.3849 UR - https://ejournals.eu/czasopismo/czasopismo-techniczne/artykul/the-influence-of-cryogenic-temperatures-on-the-characteristics-of-a-brushless-motor KW - electrical machines KW - powder metallurgy KW - cryogenic condition