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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/10.32446/0368-1025it.2024-1-35-39</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-2087</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭЛЕКТРОМАГНИТНЫЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTROMAGNETIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Методика определения степени магнитной индукции трансформаторов с синусоидальным магнитным потоком</article-title><trans-title-group xml:lang="en"><trans-title>Methodology for determining the degree of magnetic induction of transformers with a sinusoidal magnetic flux</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5280-6792</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плотников</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Plotnikov</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Плотников Сергей Михайлович, профессор кафедры АПП 5441-4069</p><p>Красноярск</p></bio><bio xml:lang="en"><p>Sergey M. Plotnikov</p><p>Krasnoyarsk</p></bio><email xlink:type="simple">smplotnikov@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный университет науки и технологий имени М.Ф. Решетнева;&#13;
Красноярский институт железнодорожного транспорта</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Reshetnev Siberian State University of Science and Technology;&#13;
Krasnoyarsk Institute of Railway Transport</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>08</day><month>03</month><year>2024</year></pub-date><volume>0</volume><issue>1</issue><fpage>35</fpage><lpage>39</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/2087">https://www.izmt.ru/jour/article/view/2087</self-uri><abstract><p>Исследовано уменьшение потерь в стали магнитопроводов электрических машин. Данные потери составляют до 5 % вырабатываемой электроэнергии, не зависят от нагрузки и могут возрастать в течение срока эксплуатации оборудования. Для эффективного проектирования и конструирования трансформаторов с низкими потерями холостого хода полные потери в стали минимизируют путём оптимизации размеров кристаллического зерна и толщины листов сердечников, совершенствования текстуры стали и конструкции магнитопровода и пр. Однако данные меры по-разному влияют на гистерезисную, вихретоковые классическую и аномальную составляющие потерь в стали, что не позволяет эффективно минимизировать полные потери. Разработана методика определения трёх составляющих потерь с применением модернизированного метода трёх частот, в котором учтена зависимость коэффициента гистерезисных потерь от частоты. Выведена формула для коррекции этого коэффициента. Показано, что приведённый в большинстве современных научных источников показатель степени магнитной индукции в выражении для вихретоковых аномальных потерь стал неактуальным. Представлена методика расчёта данного показателя для сердечника конкретного трансформатора, в которой используются найденные методом трёх частот составляющие потерь и полные потери в стали при пониженном первичном напряжении. Для исследуемого трансформатора показатель степени магнитной индукции в аномальных потерях составил 1,88. Полученные результаты можно применять при проектировании сухих и масляных трансформаторов разных мощностей, работающих при синусоидальном магнитном потоке.</p></abstract><trans-abstract xml:lang="en"><p>The research presented in the article is aimed at reducing losses in the magnetic circuits of electrical machines. These losses amount to up to 5 % of the generated electricity, do not depend on the load and can increase over the life of the equipment. To effectively design and construct transformers with low no-load losses, total losses in steel are minimized by optimizing the crystal grain size and thickness of core sheets, improving the steel texture and magnetic circuit design, etc. However, the hysteresis, classical eddy current and anomalous eddy current components of losses in steel react in different directions to these measures, which does not effectively minimize total losses. To determine the three components of losses, a modernized method of three frequencies is proposed, which takes into account the dependence of the hysteresis loss coefficient on frequency. A formula for correcting this coefficient is derived. It is shown that the indicator of the degree of magnetic induction given in most modern scientific sources in the expression for eddy current anomalous losses has become irrelevant. A method for calculating this indicator for the core of a specific transformer is presented, which uses the loss components and total losses in steel found by the method of three frequencies and the total losses in steel at a reduced primary voltage. For the transformer under study, the degree of magnetic induction in anomalous losses was 1.88. The results obtained can be used in the design of dry and oil transformers of different powers operating with a sinusoidal magnetic flux.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>магнитопровод</kwd><kwd>гистерезисные потери</kwd><kwd>вихретоковые потери</kwd><kwd>аномальные потери</kwd><kwd>магнитная индукция</kwd><kwd>опыт холостого хода</kwd><kwd>ваттметровый метод</kwd><kwd>метод трех частот</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic circuit</kwd><kwd>hysteresis losses</kwd><kwd>eddy current losses</kwd><kwd>anomalous losses</kwd><kwd>magnetic induction</kwd><kwd>no-load experiment</kwd><kwd>wattmeter method</kwd><kwd>three-frequency method</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bertotti G. General properties of power losses in soft ferromagnetic materials. 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