{"id":1659,"date":"2025-05-29T04:05:52","date_gmt":"2025-05-29T04:05:52","guid":{"rendered":"https:\/\/nbaem.com\/?p=1659"},"modified":"2025-09-17T07:39:03","modified_gmt":"2025-09-17T07:39:03","slug":"what-is-remanence","status":"publish","type":"post","link":"https:\/\/nbaem.com\/cs\/what-is-remanence\/","title":{"rendered":"Co je remanence?"},"content":{"rendered":"

Co je remanence?<\/h1>\n

Uva\u017eovali jste n\u011bkdy, pro\u010d magnet z\u016fst\u00e1v\u00e1 magnetizovan\u00fd dlouho pot\u00e9, co byl odstran\u011bn z magnetick\u00e9ho pole? To je pr\u00e1ce remanence.<\/p>\n

Remanence, nebo zbytkov\u00e1 magnetizace (Br), je \u00farove\u0148 magnetismu, kterou si permanentn\u00ed magnet udr\u017euje po odstran\u011bn\u00ed vn\u011bj\u0161\u00edho magnetick\u00e9ho pole.<\/strong><\/p>\n

\"K\u0159ivka

K\u0159ivka magnetick\u00e9ho toku 35SH BH<\/p><\/div>\n

Poj\u010fme hloub\u011bji proniknout do t\u00e9to z\u00e1kladn\u00ed vlastnosti permanentn\u00edch magnet\u016f a jak souvis\u00ed s koercivitou.<\/p>\n

co je remanence (Br)?<\/h2>\n

Magnety sv\u00e9 magnetick\u00e9 vlastnosti jen tak \u201enezapomenou\u201c. Remanence ukazuje, kolik magnetismu z\u016fst\u00e1v\u00e1 v materi\u00e1lu.<\/p>\n

Remanence (Br) se m\u011b\u0159\u00ed v Tesl\u00e1ch nebo Gaussech a ud\u00e1v\u00e1 s\u00edlu magnetismu, kter\u00fd z\u016fst\u00e1v\u00e1, kdy\u017e magnet ji\u017e nen\u00ed vystaven vn\u011bj\u0161\u00edmu magnetick\u00e9mu poli.<\/strong><\/p>\n

\"k\u0159ivka

k\u0159ivka magnetick\u00e9 hystereze<\/p><\/div>\n

<\/h3>\n

V\u011bda o remanenci<\/h3>\n

Remanence (Br) odr\u00e1\u017e\u00ed, jak siln\u011b si permanentn\u00ed magnet udr\u017euje sv\u00e9 magnetick\u00e9 vlastnosti po magnetizaci. Slo\u017een\u00ed materi\u00e1lu magnetu, struktura a uspo\u0159\u00e1d\u00e1n\u00ed dom\u00e9n ur\u010duj\u00ed jeho remanenci.<\/p>\n

1. Pro\u010d je Br d\u016fle\u017eit\u00e9<\/strong><\/h4>\n

Br je kl\u00ed\u010dov\u00e9 pro aplikace, kter\u00e9 pot\u0159ebuj\u00ed stabiln\u00ed magnetick\u00e9 pole bez trval\u00e9ho nap\u00e1jen\u00ed. Nap\u0159\u00edklad v motorech nebo gener\u00e1torech znamen\u00e1 vy\u0161\u0161\u00ed remanence konzistentn\u011bj\u0161\u00ed v\u00fdkon.<\/p>\n\n\n\n\n\n\n\n
Faktor<\/th>\nMagnety s vysokou remanenc\u00ed (Br)<\/th>\nMagnety s n\u00edzkou remanenc\u00ed (Br)<\/th>\n<\/tr>\n<\/thead>\n
Typ materi\u00e1lu<\/td>\nNdFeB, SmCo<\/td>\nAlnico, Ferrit<\/td>\n<\/tr>\n
S\u00edla pole<\/td>\nSiln\u00e9<\/td>\nSlab\u0161\u00ed<\/td>\n<\/tr>\n
Vhodnost pou\u017eit\u00ed<\/td>\nMotory, senzory, reproduktory<\/td>\nN\u00edzk\u00e9 n\u00e1klady na aplikace<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2. Jak se m\u011b\u0159\u00ed Br<\/strong><\/h4>\n

Br se m\u011b\u0159\u00ed t\u00edm, \u017ee se vzorek magnetizuje do nasycen\u00ed, odstran\u00ed se vn\u011bj\u0161\u00ed pole a zaznamen\u00e1 se zb\u00fdvaj\u00edc\u00ed magnetizace.<\/p>\n

3. \u00davahy o materi\u00e1lech<\/strong><\/h4>\n

Materi\u00e1ly jako Neodym-\u017delezo-Bor (NdFeB)<\/strong><\/a> <\/span>nab\u00edzej\u00ed vysok\u00e9 hodnoty Br, co\u017e je \u010din\u00ed ide\u00e1ln\u00edmi pro aplikace vy\u017eaduj\u00edc\u00ed siln\u00fd a trval\u00fd magnetismus. Magnety SmCo maj\u00ed tak\u00e9 vysok\u00e9 Br, ale s lep\u0161\u00ed teplotn\u00ed stabilitou. Naopak magnety z ferritu maj\u00ed ni\u017e\u0161\u00ed Br, ale jsou levn\u00e9 a odoln\u00e9 proti korozi.<\/p>\n

V m\u00e9m podnik\u00e1n\u00ed jsem vid\u011bl, jak z\u00e1kazn\u00edci p\u0159ech\u00e1zej\u00ed z feritov\u00fdch na NdFeB magnety pro vysoce v\u00fdkonn\u00e1 za\u0159\u00edzen\u00ed, jako jsou drony a EV, proto\u017ee pot\u0159ebuj\u00ed vysok\u00e9 Br pro efektivitu a kompaktn\u00ed design.<\/p>\n

Z\u00e1v\u011br<\/h2>\n

Remanence n\u00e1m \u0159\u00edk\u00e1, jak dob\u0159e si permanentn\u00ed magnet udr\u017e\u00ed sv\u00e9 magnetick\u00e9 vlastnosti po magnetizaci. Je kl\u00ed\u010dov\u00e1 pro v\u00fdb\u011br spr\u00e1vn\u00e9ho magnetu pro jakoukoli aplikaci.<\/p>\n

","protected":false},"excerpt":{"rendered":"

Co je remanence? Zamysleli jste se n\u011bkdy, pro\u010d magnet z\u016fst\u00e1v\u00e1 magnetizovan\u00fd dlouho pot\u00e9, co byl odstran\u011bn z magnetick\u00e9ho pole? To je remanence v akci. Remanence, nebo zbytkov\u00e1 magnetizace (Br), je \u00farove\u0148 magnetismu, kterou si trval\u00fd magnet udr\u017e\u00ed po odstran\u011bn\u00ed vn\u011bj\u0161\u00edho magnetick\u00e9ho pole. Poj\u010fme se do t\u00e9to d\u016fle\u017eit\u00e9 vlastnosti pono\u0159it hloub\u011bji [\u2026]<\/p>","protected":false},"author":1,"featured_media":1354,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/comments?post=1659"}],"version-history":[{"count":4,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1659\/revisions"}],"predecessor-version":[{"id":1666,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1659\/revisions\/1666"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media\/1354"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media?parent=1659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/categories?post=1659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/tags?post=1659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}