{"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\/vi\/what-is-remanence\/","title":{"rendered":"Remanence l\u00e0 g\u00ec?"},"content":{"rendered":"<h1>Remanence l\u00e0 g\u00ec?<\/h1>\n<p>B\u1ea1n c\u00f3 t\u1eebng t\u1ef1 h\u1ecfi t\u1ea1i sao m\u1ed9t nam ch\u00e2m v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c t\u1eeb t\u00ednh l\u00e2u sau khi r\u00fat kh\u1ecfi tr\u01b0\u1eddng t\u1eeb? \u0110\u00f3 ch\u00ednh l\u00e0 hi\u1ec7u \u1ee9ng remanence.<\/p>\n<p><strong>Remanence, hay c\u00f2n g\u1ecdi l\u00e0 t\u1eeb d\u01b0 (Br), l\u00e0 m\u1ee9c \u0111\u1ed9 t\u1eeb t\u00ednh m\u00e0 m\u1ed9t nam ch\u00e2m v\u0129nh c\u1eedu gi\u1eef l\u1ea1i sau khi lo\u1ea1i b\u1ecf tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i.<\/strong><\/p>\n<div id=\"attachment_1663\" style=\"width: 1019px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1663\" class=\"wp-image-1663\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve.jpg\" alt=\"\u0110\u01b0\u1eddng cong BH 35SH\" width=\"1009\" height=\"689\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-200x137.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-300x205.jpg 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-400x273.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-600x410.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-768x525.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-800x546.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-1024x699.jpg 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve-1200x820.jpg 1200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/35SH-BH-curve.jpg 1249w\" sizes=\"(max-width: 1009px) 100vw, 1009px\" \/><p id=\"caption-attachment-1663\" class=\"wp-caption-text\">\u0110\u01b0\u1eddng cong BH 35SH<\/p><\/div>\n<p>H\u00e3y \u0111i s\u00e2u h\u01a1n v\u00e0o \u0111\u1eb7c t\u00ednh thi\u1ebft y\u1ebfu c\u1ee7a nam ch\u00e2m v\u0129nh c\u1eedu n\u00e0y v\u00e0 c\u00e1ch n\u00f3 li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 c\u1ee9ng t\u1eeb.<\/p>\n<h2>Remanence (Br) l\u00e0 g\u00ec?<\/h2>\n<p>Nam ch\u00e2m kh\u00f4ng ch\u1ec9 \u201cqu\u00ean\u201d t\u1eeb t\u00ednh c\u1ee7a ch\u00fang. Remanence th\u1ec3 hi\u1ec7n l\u01b0\u1ee3ng t\u1eeb t\u00ednh c\u00f2n l\u1ea1i trong v\u1eadt li\u1ec7u.<\/p>\n<p><strong>Remanence (Br) \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng Tesla ho\u1eb7c Gauss v\u00e0 cho bi\u1ebft c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb t\u00ednh c\u00f2n l\u1ea1i khi nam ch\u00e2m kh\u00f4ng c\u00f2n b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i.<\/strong><\/p>\n<div id=\"attachment_1355\" style=\"width: 257px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1355\" class=\"size-full wp-image-1355\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis-curve.png\" alt=\"\u0111\u01b0\u1eddng cong ph\u1ea3n hysteresis t\u1eeb tr\u01b0\u1eddng\" width=\"247\" height=\"197\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis-curve-177x142.png 177w, https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis-curve-200x160.png 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2024\/10\/magnetic-hysteresis-curve.png 247w\" sizes=\"(max-width: 247px) 100vw, 247px\" \/><p id=\"caption-attachment-1355\" class=\"wp-caption-text\">\u0111\u01b0\u1eddng cong ph\u1ea3n hysteresis t\u1eeb tr\u01b0\u1eddng<\/p><\/div>\n<h3><\/h3>\n<h3>Khoa h\u1ecdc v\u1ec1 remanence<\/h3>\n<p>Remanence (Br) ph\u1ea3n \u00e1nh m\u1ee9c \u0111\u1ed9 nam ch\u00e2m v\u0129nh c\u1eedu gi\u1eef l\u1ea5y \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a n\u00f3 sau khi t\u1eeb h\u00f3a. Th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u, c\u1ea5u tr\u00fac v\u00e0 s\u1ef1 s\u1eafp x\u1ebfp mi\u1ec1n t\u1eeb quy\u1ebft \u0111\u1ecbnh remanence c\u1ee7a nam ch\u00e2m.<\/p>\n<h4>1. <strong>T\u1ea1i sao Br l\u1ea1i quan tr\u1ecdng?<\/strong><\/h4>\n<p>Br r\u1ea5t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n m\u1ed9t tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh m\u00e0 kh\u00f4ng c\u1ea7n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng li\u00ean t\u1ee5c. V\u00ed d\u1ee5, trong \u0111\u1ed9ng c\u01a1 ho\u1eb7c m\u00e1y ph\u00e1t \u0111i\u1ec7n, remanence cao h\u01a1n \u0111\u1ed3ng ngh\u0129a v\u1edbi hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh h\u01a1n.<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1<\/th>\n<th>Nam ch\u00e2m c\u00f3 Remanence (Br) cao<\/th>\n<th>Nam ch\u00e2m c\u00f3 Remanence (Br) th\u1ea5p<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Lo\u1ea1i v\u1eadt li\u1ec7u<\/td>\n<td>NdFeB, SmCo<\/td>\n<td>Alnico, Ferrit<\/td>\n<\/tr>\n<tr>\n<td>C\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng<\/td>\n<td>M\u1ea1nh m\u1ebd<\/td>\n<td>Y\u1ebfu h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Ph\u00f9 h\u1ee3p \u1ee9ng d\u1ee5ng<\/td>\n<td>\u0110\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn, loa<\/td>\n<td>C\u00e1c \u1ee9ng d\u1ee5ng gi\u00e1 th\u00e0nh th\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>2. <strong>C\u00e1ch \u0111o \u0111\u1ed9 Br<\/strong><\/h4>\n<p>Br \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng c\u00e1ch magnet h\u00f3a m\u1eabu \u0111\u1ebfn m\u1ee9c b\u00e3o h\u00f2a, lo\u1ea1i b\u1ecf tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i v\u00e0 ghi l\u1ea1i \u0111\u1ed9 t\u1eeb d\u01b0 c\u00f2n l\u1ea1i.<\/p>\n<h4>3. <strong>C\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 v\u1eadt li\u1ec7u<\/strong><\/h4>\n<p>C\u00e1c v\u1eadt li\u1ec7u nh\u01b0<span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\"><strong> Neodymium-Iron-Boron (NdFeB)<\/strong><\/a> <\/span>cung c\u1ea5p gi\u00e1 tr\u1ecb Br cao, l\u00e0m cho ch\u00fang l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u t\u1eeb tr\u01b0\u1eddng m\u1ea1nh v\u00e0 b\u1ec1n l\u00e2u. Nam ch\u00e2m SmCo c\u0169ng c\u00f3 gi\u00e1 tr\u1ecb Br cao nh\u01b0ng v\u1edbi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, nam ch\u00e2m Ferrite c\u00f3 Br th\u1ea5p h\u01a1n nh\u01b0ng r\u1ebb v\u00e0 ch\u1ed1ng \u0103n m\u00f2n.<\/p>\n<p>Trong c\u00f4ng vi\u1ec7c kinh doanh c\u1ee7a t\u00f4i, t\u00f4i \u0111\u00e3 th\u1ea5y kh\u00e1ch h\u00e0ng chuy\u1ec3n t\u1eeb nam ch\u00e2m Ferrite sang nam ch\u00e2m NdFeB cho c\u00e1c thi\u1ebft b\u1ecb hi\u1ec7u su\u1ea5t cao nh\u01b0 drone v\u00e0 xe \u0111i\u1ec7n v\u00ec ch\u00fang c\u1ea7n Br cao \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 v\u00e0 thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Remanence cho ch\u00fang ta bi\u1ebft nam ch\u00e2m v\u0129nh c\u1eedu gi\u1eef t\u1eeb t\u00ednh t\u1ed1t nh\u01b0 th\u1ebf n\u00e0o sau khi magnet h\u00f3a. \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 ch\u1ecdn \u0111\u00fang lo\u1ea1i nam ch\u00e2m cho m\u1ecdi \u1ee9ng d\u1ee5ng.<\/p>\n<hr \/>","protected":false},"excerpt":{"rendered":"<p>Remanence l\u00e0 g\u00ec? B\u1ea1n \u0111\u00e3 t\u1eebng t\u1ef1 h\u1ecfi t\u1ea1i sao m\u1ed9t nam ch\u00e2m v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c t\u1eeb t\u00ednh l\u00e2u sau khi r\u00fat kh\u1ecfi tr\u01b0\u1eddng t\u1eeb? \u0110\u00f3 ch\u00ednh l\u00e0 remanence \u0111ang ho\u1ea1t \u0111\u1ed9ng. Remanence, hay c\u00f2n g\u1ecdi l\u00e0 t\u1eeb d\u01b0 (Br), l\u00e0 m\u1ee9c \u0111\u1ed9 t\u1eeb t\u00ednh m\u00e0 m\u1ed9t nam ch\u00e2m v\u0129nh c\u1eedu gi\u1eef l\u1ea1i sau khi tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i b\u1ecb lo\u1ea1i b\u1ecf. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 \u0111\u1eb7c t\u00ednh quan tr\u1ecdng n\u00e0y [\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\/vi\/wp-json\/wp\/v2\/posts\/1659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=1659"}],"version-history":[{"count":4,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1659\/revisions"}],"predecessor-version":[{"id":1666,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1659\/revisions\/1666"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1354"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}