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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">metrol</journal-id><journal-title-group><journal-title xml:lang="ru">Метрология</journal-title><trans-title-group xml:lang="en"><trans-title>Metrologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0132-4713</issn><issn pub-type="epub">2712-9071</issn><publisher><publisher-name>ВНИИМС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0132-4713.2021-3-35-47</article-id><article-id custom-type="elpub" pub-id-type="custom">metrol-75</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></article-categories><title-group><article-title>Методика определения оптимальной толщины листов магнитопроводов электрических машин ваттметровым методом</article-title><trans-title-group xml:lang="en"><trans-title>Method for determining of the optimal thickness of sheets of magnetic cores of electrical machines by the wattmeter method</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>Сергей Михайлович Плотников, Красноярск</p></bio><bio xml:lang="en"><p>Sergey M. Plotnikov, Krasnoyarsk, Russia</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. Решетнёва; Красноярский институт железнодорожного транспорта</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Reshetnev Siberian State University of Science and Technology; Krasnoyarsk Institute of Railway Transport</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>26</day><month>09</month><year>2021</year></pub-date><volume>0</volume><issue>3</issue><fpage>35</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ВНИИМС, 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">ВНИИМС</copyright-holder><copyright-holder xml:lang="en">ВНИИМС</copyright-holder><license xlink:href="https://metrol.elpub.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://metrol.elpub.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://metrol.elpub.ru/jour/article/view/75">https://metrol.elpub.ru/jour/article/view/75</self-uri><abstract><p>Исследована проблема уменьшения магнитных потерь (потерь холостого хода) в стали магнитопроводов электрических машин. Рассмотрена задача определения оптимальной толщины стальных листов магнитопровода электрической машины. Критерием оптимальности является минимум мощности магнитных потерь в стали. Проанализированы мощности магнитных потерь в современных электрических машинах и аппаратах в зависимости от толщины листов электротехнической стали. Предложена методика определения оптимальной толщины стальных листов магнитопровода электрической машины на основе ваттметрового метода. В ходе эксперимента, проведённого на двух идентичных магнитопроводах из листов стали разной толщины, измерены потери в стали на двух частотах перемагничивания и рассчитана оптимальная толщина листов. Показано, что предложенная формула расчёта толщины листов справедлива как для изотропной, так и для анизотропной стали. Предложенная методика применима для трансформаторов, а также для электрических двигателей и генераторов. </p></abstract><trans-abstract xml:lang="en"><p>The problem of reducing magnetic losses (no-load losses) in the steel of the magnetic cores of electrical machines is investigated. The tasc of determining the optimal thickness of steel sheets of the magnetic circuit of an electric machine is considered. The criterion for optimality is the minimum power of magnetic losses in steel. Currently, this problem does not have an exact solution due to the fact that the exact ratio of the hysteresis and eddy current components of magnetic losses in steel is unknown. Analyzed the power of magnetic losses in modern electrical machines and devices, depending on the thickness of the sheets of electrical steel. A method is proposed for determining the optimal thickness of steel sheets of the magnetic circuit of an electric machine based on the wattmeter method. In the course of the experiment, two identical magnetic circuits were selected from steel sheets of different thicknesses, for which the losses in steel were measured at different frequencies of magnetization reversal and the optimal thickness of the sheets was calculated. The proposed formula for calculating the thickness of the sheets is valid for both isotropic and anisotropic steel. The proposed technique can be used for both transformers and electric motors and generators. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>магнитопровод</kwd><kwd>толщина листа</kwd><kwd>гистерезис</kwd><kwd>вихревые токи</kwd><kwd>потери в стали</kwd><kwd>опыт холостого хода</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnetic core</kwd><kwd>sheet thickness</kwd><kwd>hysteresis</kwd><kwd>eddy currents</kwd><kwd>losses in steel</kwd><kwd>no-load experience</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">Moses A. J., Scripta Materialia, 2012, vol. 67, no. 6, pp. 560–565. https://doi.org/10.1016/j.scriptamat.2012.02.027</mixed-citation><mixed-citation xml:lang="en">Moses A. 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