{"id":1293,"date":"2018-12-30T11:19:58","date_gmt":"2018-12-30T09:19:58","guid":{"rendered":"http:\/\/elth.ucv.ro\/fisiere\/anale\/?p=1293"},"modified":"2018-12-30T11:20:59","modified_gmt":"2018-12-30T09:20:59","slug":"single-three-phase-transformer-with-variable-frequency-for-electric-locomotives","status":"publish","type":"post","link":"https:\/\/elth.ucv.ro\/fisiere\/anale\/?p=1293","title":{"rendered":"Single\/Three-Phase Transformer with Variable Frequency for Electric Locomotives"},"content":{"rendered":"<h3 style=\"text-align: center;\">Abstract<\/h3>\n<table style=\"height: 448px;\" border=\"0\" width=\"621\" bgcolor=\"#FFFFFF\">\n<tbody>\n<tr>\n<td width=\"562\">Electric rail transport is positioned as environ-ment-friendly technology that has good future prospects for development. The supply of electric rail transport from DC or AC power lines requires the use of specialized transform-ers that form the three-phase system in the low-voltage cir-cuit to power this load. Solid State Transformer (SST) are very attractive for use in power systems of electric locomo-tives. This paper examines a new architecture for the reali-zation of SST transformers for their use in power systems of electric locomotives. The proposed SST transformer has the bidirectional high-frequency power transmission capability and at the same time ensures multiplication of phases in the low voltage circuit. The SST transformer is a single-phase \/ three-phase transformer, which can be supplied both from the high-voltage DC power network and from the AC net-work frequently used in electric rail transport. Changing the power supply type (of the current) does not lead to changes in the topology of the SST. The transformer is de-signed as an object made of identical functional modules. The ferromagnetic core is made of separate portions for each functional module. This simplifies the problem of en-suring the electrical stiffness of the transformer. The tran-sistors of the module operate at variable switching fre-quency, have soft switching mode. Energy conversion takes place in a single step. This ensures that losses are diminished and transformer efficiency is increased in all load regimes. Mathematical simulations have confirmed that this trans-former has a very low impact on the power supply, whether the power supply is DC or AC. Under-load operation of the SST transformer does not lead to pollution of the power supply network with higher current harmonics.<\/td>\n<td width=\"66\"><a href=\"http:\/\/elth.ucv.ro\/fisiere\/anale\/wp-content\/uploads\/2018\/12\/56.pdf\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-191\" src=\"http:\/\/elth.ucv.ro\/fisiere\/anale\/wp-content\/uploads\/2015\/03\/images1.jpg\" alt=\"images\" width=\"100\" height=\"104\" \/><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Abstract Electric rail transport is positioned as environ-ment-friendly technology that has good future prospects for development. The supply of electric rail transport from DC or AC power lines requires the use of specialized transform-ers that form the three-phase system in the low-voltage cir-cuit to power this load. Solid State Transformer (SST) are very attractive for &hellip; <a href=\"https:\/\/elth.ucv.ro\/fisiere\/anale\/?p=1293\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Single\/Three-Phase Transformer with Variable Frequency for Electric Locomotives<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1293","post","type-post","status-publish","format-standard","hentry","category-fara-categorie"],"_links":{"self":[{"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/posts\/1293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1293"}],"version-history":[{"count":2,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/posts\/1293\/revisions"}],"predecessor-version":[{"id":1296,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=\/wp\/v2\/posts\/1293\/revisions\/1296"}],"wp:attachment":[{"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elth.ucv.ro\/fisiere\/anale\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}