{"id":344,"date":"2018-11-10T17:52:08","date_gmt":"2018-11-10T16:52:08","guid":{"rendered":"http:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/?page_id=344"},"modified":"2023-01-24T19:55:04","modified_gmt":"2023-01-24T18:55:04","slug":"zaklady-vzniku-stridaveho-proudu","status":"publish","type":"page","link":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/zaklady-vzniku-stridaveho-proudu\/","title":{"rendered":"Z\u00e1klady vzniku st\u0159\u00eddav\u00e9ho proudu"},"content":{"rendered":"

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Zkuste n\u011bkdy p\u0159ipojit k c\u00edvce bez j\u00e1dra<\/strong> stejnosm\u011brn\u00fd voltmetr.\"\"<\/p>\n

Pot\u00e9 zkuste zasunout do t\u00e9to c\u00edvky magnet ve tvaru nap\u0159. v\u00e1lce nebo kv\u00e1dru (prost\u011b n\u011bjak\u00fd podlouhl\u00fd), aby tvo\u0159il j\u00e1dro c\u00edvky.
\nPozorujte, co ud\u011bl\u00e1 voltmetr: Na chvilku nam\u011b\u0159\u00ed n\u011bjak\u00e9 nap\u011bt\u00ed.\u00a0Zasunut\u00edm magnetu do c\u00edvky se na c\u00edvce indukovalo nap\u011bt\u00ed.<\/strong> Velikost tohoto nap\u011bt\u00ed z\u00e1vis\u00ed na s\u00edle magnetu. Polarita tohoto nap\u011bt\u00ed z\u00e1vis\u00ed na tom, jak\u00fdm p\u00f3lem tam ten magnet zasunete.<\/p>\n

Indukovan\u00e9 nap\u011bt\u00ed ov\u0161em hned zase zaniklo a voltmetr m\u011b\u0159\u00ed d\u00e1le nulu. Zkuste magnet zase vyndat. Op\u011bt se indukuje stejn\u011b velk\u00e9 nap\u011bt\u00ed ov\u0161em s opa\u010dnou polaritou.<\/p>\n

A pr\u00e1v\u011b na tomto principu se vyr\u00e1b\u00ed st\u0159\u00eddav\u00fd proud v elektr\u00e1rn\u00e1ch. Je tam gener\u00e1tor, jeho\u017e obr\u00e1zek je zde:\"\"Odkaz na zdroj obr\u00e1zku.<\/a><\/p>\n

Cel\u00e1 kru\u017enice je obal vnit\u0159ku gener\u00e1toru. Uprost\u0159ed je magnet, kter\u00fd je p\u0159id\u011blan\u00fd na h\u0159\u00eddeli, kter\u00e1 vy\u010dn\u00edv\u00e1 z gener\u00e1toru a n\u011bco ji mechanicky rozt\u00e1\u010d\u00ed. T\u00edm se to\u010d\u00ed magnet, kter\u00fd je velice siln\u00fd a vytv\u00e1\u0159\u00ed magnetick\u00e9 pole v okol\u00ed 3 c\u00edvek, kter\u00e9 jsou v gener\u00e1toru. Tyto 3 c\u00edvky jsou navz\u00e1jem posunuty o 120\u00b0 a je od nich vyvedeno veden\u00ed p\u0159es transform\u00e1tory a elektrickou rozvodnou s\u00ed\u0165.<\/p>\n

Nap\u011bt\u00ed v elektr\u00e1rn\u011b je takto vyr\u00e1b\u011bno ve 3 f\u00e1z\u00edch. Elektronick\u00e1 za\u0159\u00edzen\u00ed jsou ov\u0161em jen na jednu f\u00e1zi. Graf pr\u016fb\u011bhu jedn\u00e9 f\u00e1ze je tento:\"\"
\nZde je odkaz na zdroj tohoto obr\u00e1zku<\/a><\/p>\n

Zat\u00edmco stejnosm\u011brn\u00e9 nap\u011bt\u00ed se z\u00edsk\u00e1v\u00e1 zpravidla z elektrick\u00fdch \u010dl\u00e1nk\u016f (chemick\u00e9 energie), tak st\u0159\u00eddav\u00e9 nap\u011bt\u00ed se z\u00edsk\u00e1v\u00e1 zpravidla z magnetick\u00e9ho pole.
\nPr\u016fb\u011bh stejnosm\u011brn\u00e9ho nap\u011bt\u00ed tvo\u0159\u00ed prost\u011b rovn\u00e1 p\u0159\u00edmka. P\u0159i zat\u00ed\u017een\u00e9m el. \u010dl\u00e1nku je to k\u0159ivka, kter\u00e1 pomalou\u010dku kles\u00e1, proto\u017ee se \u010dl\u00e1nek vyb\u00edj\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Zkuste n\u011bkdy p\u0159ipojit k c\u00edvce bez j\u00e1dra stejnosm\u011brn\u00fd voltmetr. Pot\u00e9 zkuste zasunout do t\u00e9to c\u00edvky magnet ve tvaru nap\u0159. v\u00e1lce nebo kv\u00e1dru (prost\u011b n\u011bjak\u00fd podlouhl\u00fd), aby tvo\u0159il j\u00e1dro c\u00edvky. Pozorujte, co ud\u011bl\u00e1 voltmetr: Na chvilku nam\u011b\u0159\u00ed n\u011bjak\u00e9 nap\u011bt\u00ed.\u00a0Zasunut\u00edm magnetu do c\u00edvky se na c\u00edvce indukovalo nap\u011bt\u00ed. Velikost tohoto nap\u011bt\u00ed z\u00e1vis\u00ed na s\u00edle magnetu. […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"class_list":["post-344","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/pages\/344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/comments?post=344"}],"version-history":[{"count":14,"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/pages\/344\/revisions"}],"predecessor-version":[{"id":787,"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/pages\/344\/revisions\/787"}],"wp:attachment":[{"href":"https:\/\/www.krusinsky.cz\/domains\/krusinsky.cz\/wp-json\/wp\/v2\/media?parent=344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}