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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">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2026-92-4-33-42</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2796</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>ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ И КОНТРОЛЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICAL METHODS OF RESEARCH AND MONITORING</subject></subj-group></article-categories><title-group><article-title>Вихретоковый контроль пропаянности боковых стенок токоведущих соединений статоров электрических машин с учетом мешающих факторов</article-title><trans-title-group xml:lang="en"><trans-title>Eddy current testing of the side walls of current-carrying joints of stators of electric machines accounting for the interfering factors</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коган</surname><given-names>Л. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Kogan</surname><given-names>L. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Леонид Хонович Коган</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, д. 18</p></bio><bio xml:lang="en"><p>Leonid Kh. Kogan</p><p>18, ul. S. Kovalevskoy, Yekaterinburg, 620108</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сташков</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Stashkov</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Николаевич Сташков</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, д. 18</p></bio><bio xml:lang="en"><p>Aleksey N. Stashkov</p><p>18, ul. S. Kovalevskoy, Yekaterinburg, 620108</p></bio><email xlink:type="simple">stashkov@imp.uran.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики металлов им. М. Н. Михеева УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Mikheev Institute of Metal Physics, RAS, Ural Branch</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>04</month><year>2026</year></pub-date><volume>92</volume><issue>4</issue><fpage>33</fpage><lpage>42</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коган Л.Х., Сташков А.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Коган Л.Х., Сташков А.Н.</copyright-holder><copyright-holder xml:lang="en">Kogan L.K., Stashkov A.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.zldm.ru/jour/article/view/2796">https://www.zldm.ru/jour/article/view/2796</self-uri><abstract><p>Вихретоковый контроль качества пайки токоведущих соединений статоров гидро- и турбогенераторов проводят при вводе в эксплуатацию новых агрегатов, а также после их планового ремонта. Цель работы — исследование удельной электрической проводимости соединительных планок токоведущих соединений из полуфабрикатов меди марки М1 и исключение влияния соседних соединений на результаты контроля. При использовании в токоведущих соединениях обмоток статоров турбогенераторов в качестве соединительных планок шин, изготовленных способом горячей прокатки, наблюдается существенная изменчивость (от 2 до 4,4 %) их электропроводности по толщине и от изделия к изделию. Погрешность определения уровня пропаянности боковых стенок с использованием вихретокового преобразователя (ВТП) при этом может достигать 52,8 %. Это необходимо учитывать при разработке средств вихретокового контроля качества пайки подобных соединений, причем определять электропроводность следует на тех же частотах, на которых будет проводиться контроль. Показано, что при контроле токоведущих соединений обмоток статоров гидрогенераторов изменчивость электропроводности на результаты контроля качества пайки не влияет, поскольку токоведущие стержни и соединительные планки в данном случае состоят из медных мягких шин, изготавливаемых из катанки методом восходящего литья. Однако влияние соседних соединений на сигналы ВТП значительно. Предложен способ исключения такого влияния, заключающийся в экранировании обмоток ВТП двухслойным экраном из трансформаторной стали. Полученные результаты могут быть использованы для повышения достоверности контроля паяных соединений в энергетическом оборудовании и совершенствования методики в случае применения ее для других типов соединений, а также в условиях сложных электромагнитных помех.</p></abstract><trans-abstract xml:lang="en"><p>Eddy current testing of the quality of soldering of current-carrying joints of stators of hydro- and turbogenerators is carried out when commissioning new units, as well as after their scheduled repairs. The objective of this study is to investigate the specific electrical conductivity of connecting strips of current-carrying joints made of M1 copper semi-finished products and to eliminate the influence of adjacent joints on the testing results. When hot-rolled busbars are used as connecting strips in current-carrying joints of turbogenerator stator windings, significant variability (from 2 to 4.4%) in their electrical conductivity across their thickness and from product to product is observed. The error in determining the solder integrity of sidewalls using an eddy current transducer (ECT) can reach 52.8%. This must be taken into account when developing eddy current testing tools for soldering such joints, with electrical conductivity determined at the same frequencies at which the testing will be performed. It has been demonstrated that conductivity variability does not affect solder quality testing results when inspecting current-carrying joints in hydrogenerator stator windings, as the current-carrying rods and connecting strips in this case consist of soft copper busbars manufactured from rod using the upward casting method. However, the influence of adjacent connections on the ECT signals is significant. A method for eliminating this influence is proposed, consisting of shielding the ECT windings with a two-layer screen made of transformer steel. The obtained results can be used to improve the reliability of solder joint inspection in power equipment and to refine the methodology for use with other types of connections, as well as in conditions of complex electromagnetic interference.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>токоведущие соединения</kwd><kwd>контроль пайки</kwd><kwd>вихретоковый преобразователь</kwd><kwd>двухчастотный метод</kwd><kwd>удельное электрическое сопротивление.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>current-carrying joints</kwd><kwd>NDT of soldering</kwd><kwd>eddy current transducer</kwd><kwd>dual-frequency method</kwd><kwd>electrical resistivity</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Минобрнауки РФ для ИФМ УрО РАН.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Maierhofer C., Rollig M., Steinfurth H., et al. 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