Curso internacional:Dimensión y selección de soluciones para UPS y transformador de aislamiento.
PARTE1
sábado, 12 de agosto de 2023
quarta-feira, 9 de agosto de 2023
Course “Electricity and Magnetism. Lectures” by Doctor of Physical and Mathematical Sciences, Professor of the Moscow Institute of Physics and Technology Kozel Stanislav Mironovich.
Электричество и магнетизм -Профессор Козел Станислав Миронович
Course “Electricity and Magnetism. Lectures” is designed for second-year students of technical universities. Lectures are given by Doctor of Physical and Mathematical Sciences, Professor of the Moscow Institute of Physics and Technology, Honored Worker of Science of the Russian Federation, Kozel Stanislav Mironovich.
The course covers key aspects of electricity, magnetism and the theory of vibrations. Such important concepts as the dipole field, the image method, the electric field in matter, the energy method for calculating forces, the circulation theorem, the magnetic field in matter, electromagnetic induction, forces in a magnetic field, free oscillations, the method of complex amplitudes, spectral analysis in linear systems, Maxwell's equations, electromagnetic waves in waveguides.
Each lecture contains theoretical material, demonstrations of experiments, solving practical problems. Theoretical calculations are carried out with the help of knowledge of the basics of integral-differential calculus and vector algebra.
ORIGINAL LINK: https://mipt.lectoriy.ru/lecture/Physics-Electricity-L10-Kozel-131008.01
A STUDY OF THE FACTORS THAT AFFECT LITHIUM ION BATTERY DEGRADATION by SHIHUI XIONG -Dr. Robert O’Connell, Thesis Supervisor MAY 2019 University of Missouri-Columbia
A STUDY OF THE FACTORS THAT AFFECT LITHIUM ION BATTERY DEGRADATION by Shihui Xiong --Dr. Robert O’Connell, Thesis Supervisor
ABSTRACT
Secondary batteries have been applied in every aspect of our life, from cell phones,
to laptops, medical devices, satellites, and renewable energy power stations. Li-ion
batteries have shown superior advantages in their ability to store large amount of energy in
compact spaces and their long battery life. However, battery capacity degradation, which
causes battery failure, posts a serious concern to the economy and efficiency to individuals
and industries. The degradation rate is affected by several factors including temperature,
charge and discharge voltage, current, and the level at which the battery is charged or
discharged. Understanding these factors can largely help to reduce the speed of battery
failure and allow batteries to better serve their purpose. First, this thesis project did a review
of existing literatures addressing how conditions including temperature, state of charge,
depth of discharge, charge voltage, and C-rate affect Li-ion battery degradation rate and
the conditions necessary to achieve optimal battery life. An experiment was done to study
how battery chemistry, cycle frequency, and temperature affect battery degradation rate
and observe how degradation affects battery performance. Results show that high and low
temperature shorten battery life, cycle frequency is not consequential with Li-ion battery
degradation rate, and INR batteries might have shorter battery life than IMR batteries.
These findings will help consumers and companies better understand proper usage of Li
ion batteries.
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terça-feira, 8 de agosto de 2023
Tatur T.A. Fundamentals of the theory of electrical circuits-Татур Т.А. Основы теории электрических цепей
Tutorial. M.: 1980. - 271 p. The book consists of two parts: linear electrical circuits and non-linear electrical circuits. Methods of analysis and synthesis, as a rule, are accompanied by calculation algorithms and illustrative examples. For clarity, the material is presented mainly in the form of tables. Designed for students of electrical engineering specialties of universities.
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