{"id":1686,"date":"2025-06-18T08:54:46","date_gmt":"2025-06-18T08:54:46","guid":{"rendered":"https:\/\/nbaem.com\/?p=1686"},"modified":"2025-06-18T08:54:46","modified_gmt":"2025-06-18T08:54:46","slug":"halbach-array-magnet","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/halbach-array-magnet\/","title":{"rendered":"Nam ch\u00e2m m\u1ea3ng Halbach"},"content":{"rendered":"<h1>Nam ch\u00e2m m\u1ea3ng Halbach<\/h1>\n<p>B\u1ea1n c\u00f3 c\u1ea7n m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u1edf m\u1ed9t ph\u00eda v\u00e0 g\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng \u1edf ph\u00eda kia kh\u00f4ng? C\u00f3 m\u1ed9t gi\u1ea3i ph\u00e1p\u2014kh\u00f4ng d\u00e2y, ch\u1ec9 c\u1ea7n nam ch\u00e2m.<\/p>\n<p><strong>M\u1ea3ng Halbach l\u00e0 m\u1ed9t c\u00e1ch s\u1eafp x\u1ebfp th\u00f4ng minh c\u00e1c nam ch\u00e2m gi\u00fap t\u0103ng c\u01b0\u1eddng tr\u01b0\u1eddng t\u1eeb \u1edf m\u1ed9t m\u1eb7t trong khi tri\u1ec7t ti\u00eau \u1edf m\u1eb7t kia.<\/strong><\/p>\n<div id=\"attachment_1687\" style=\"width: 600px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1687\" class=\"wp-image-1687\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1.jpg\" alt=\"L\u1eafp r\u00e1p nam ch\u00e2m m\u1ea3ng Halbach\" width=\"590\" height=\"832\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-200x282.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-213x300.jpg 213w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-400x564.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-600x846.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-726x1024.jpg 726w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-768x1083.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-800x1128.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1-1089x1536.jpg 1089w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1.jpg 1156w\" sizes=\"(max-width: 590px) 100vw, 590px\" \/><p id=\"caption-attachment-1687\" class=\"wp-caption-text\">L\u1eafp r\u00e1p nam ch\u00e2m m\u1ea3ng Halbach<\/p><\/div>\n<p>Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 <span style=\"color: #ff6600;\"><strong><a style=\"color: #ff6600;\" title=\"Nam ch\u00e2m m\u1ea3ng Halbach\" href=\"https:\/\/nbaem.com\/vi\/products\/halbach-array\/\">Nam ch\u00e2m m\u1ea3ng Halbach<\/a><\/strong><\/span><\/p>\n<p>T\u1eeb \u0111\u1ed9ng c\u01a1 \u0111\u1ebfn t\u00e0u maglev, thi\u1ebft k\u1ebf m\u1ea1nh m\u1ebd n\u00e0y \u0111ang th\u00fac \u0111\u1ea9y t\u01b0\u01a1ng lai c\u1ee7a k\u1ef9 thu\u1eadt t\u1eeb tr\u01b0\u1eddng.<\/p>\n<h2>Halbach array d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/h2>\n<p>Nam ch\u00e2m r\u1ea5t h\u1eefu \u00edch\u2014nh\u01b0ng n\u1ebfu ch\u00fang ta c\u00f3 th\u1ec3 h\u01b0\u1edbng s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang ch\u1ec9 v\u1ec1 m\u1ed9t ph\u00eda th\u00ec sao?<\/p>\n<p><strong>Halbach array \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed9ng c\u01a1, h\u1ec7 th\u1ed1ng t\u1eeb tr\u01b0\u1eddng t\u1eeb t\u00ednh v\u00e0 gia t\u1ed1c k\u1ebf h\u1ea1t nh\u00e2n, n\u01a1i c\u00e1c tr\u01b0\u1eddng t\u1eeb h\u01b0\u1edbng c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3.<\/strong><\/p>\n<h3>N\u01a1i Halbach array t\u1ecfa s\u00e1ng<\/h3>\n<p>Halbach array t\u1eadp trung tr\u01b0\u1eddng t\u1eeb trong m\u1ed9t h\u01b0\u1edbng. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1 cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n tr\u01b0\u1eddng t\u1eeb m\u1ea1nh m\u00e0 kh\u00f4ng b\u1ecb nhi\u1ec5u ho\u1eb7c l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng:<\/p>\n<h4>1. <strong>\u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n<\/strong><\/h4>\n<p>Halbach array \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed9ng c\u01a1 kh\u00f4ng ch\u1ed5i than \u0111\u1ec3 c\u1ea3i thi\u1ec7n m\u00f4-men xo\u1eafn, hi\u1ec7u qu\u1ea3 v\u00e0 m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t. Ch\u00fang gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t t\u1eeb s\u1eaft l\u01b0ng v\u00e0 cho ph\u00e9p thi\u1ebft k\u1ebf \u0111\u1ed9ng c\u01a1 nh\u1ecf g\u1ecdn.<\/p>\n<h4>2. <strong>Gia t\u1ed1c t\u1eeb (Maglev)<\/strong><\/h4>\n<p>T\u00e0u maglev s\u1eed d\u1ee5ng Halbach array \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, n\u00e2ng \u0111\u1ee1 kh\u00f4ng ma s\u00e1t. Tr\u01b0\u1eddng t\u1eadp trung cho ph\u00e9p tr\u01b0\u1ee3t m\u01b0\u1ee3t m\u00e0 m\u00e0 kh\u00f4ng ti\u1ebfp x\u00fac v\u1eadt l\u00fd.<\/p>\n<h4>3. <strong>Gia t\u1ed1c k\u1ebf h\u1ea1t nh\u00e2n<\/strong><\/h4>\n<p>Halbach array t\u1ea1o ra c\u00e1c tr\u01b0\u1eddng t\u1eeb m\u1ea1nh, \u0111\u1ed3ng nh\u1ea5t trong c\u00e1c b\u1ed9 ph\u1eadn ph\u00e1t xung synchrotron, gi\u00fap u\u1ed1n cong v\u00e0 gia t\u1ed1c h\u1ea1t \u0111\u1ec3 nghi\u00ean c\u1ee9u ho\u1eb7c h\u00ecnh \u1ea3nh.<\/p>\n<h4>4. <strong>M\u00e1y MRI v\u00e0 thi\u1ebft b\u1ecb y t\u1ebf<\/strong><\/h4>\n<p>M\u1ed9t s\u1ed1 thi\u1ebft k\u1ebf MRI ti\u00ean ti\u1ebfn s\u1eed d\u1ee5ng \u1ed1ng Halbach \u0111\u1ec3 t\u1ea1o ra tr\u01b0\u1eddng n\u1ed9i b\u1ed9 \u0111\u1ed3ng nh\u1ea5t v\u1edbi \u00edt nhi\u1ec5u t\u1eeb b\u00ean ngo\u00e0i.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>L\u1ee3i \u00edch mang l\u1ea1i<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Rotor \u0111\u1ed9ng c\u01a1<\/td>\n<td>Hi\u1ec7u qu\u1ea3 cao h\u01a1n, thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn<\/td>\n<\/tr>\n<tr>\n<td>H\u1ec7 th\u1ed1ng maglev<\/td>\n<td>N\u00e2ng \u0111\u1ee1 \u1ed5n \u0111\u1ecbnh v\u1edbi l\u1ef1c n\u00e2ng th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>Ngu\u1ed3n ph\u00e1t xung synchrotron<\/td>\n<td>Tr\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng t\u1eadp trung v\u00e0 \u0111\u1ed3ng nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td>H\u00ecnh \u1ea3nh y h\u1ecdc<\/td>\n<td>V\u00f9ng h\u00ecnh \u1ea3nh s\u1ea1ch v\u1edbi \u0111\u1ed9 r\u00f2 th\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Trong c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh, t\u00f4i \u0111\u00e3 th\u1ea5y c\u00e1c thi\u1ebft k\u1ebf Halbach gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng h\u1ec7 th\u1ed1ng xu\u1ed1ng 20% trong khi duy tr\u00ec ho\u1eb7c t\u0103ng c\u01b0\u1eddng \u0111\u1ea7u ra t\u1eeb tr\u01b0\u1eddng. \u0110\u00f3 l\u00e0 m\u1ed9t l\u1ee3i \u00edch l\u1edbn cho c\u00e1c thi\u1ebft b\u1ecb hi\u1ec7u su\u1ea5t cao.<\/p>\n<h2>M\u1ed9t m\u1ea3ng Halbach m\u1ea1nh h\u01a1n bao nhi\u00eau l\u1ea7n?<\/h2>\n<p>Ch\u00fang ta bi\u1ebft r\u1eb1ng tr\u01b0\u1eddng t\u1eadp trung, nh\u01b0ng n\u00f3 m\u1ea1nh h\u01a1n bao nhi\u00eau l\u1ea7n?<\/p>\n<p><strong>M\u1ed9t m\u1ea3ng Halbach c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng m\u1ea1nh h\u01a1n t\u1eeb 1,4 \u0111\u1ebfn 2 l\u1ea7n \u1edf ph\u00eda l\u00e0m vi\u1ec7c so v\u1edbi c\u00e1c s\u1eafp x\u1ebfp nam ch\u00e2m truy\u1ec1n th\u1ed1ng s\u1eed d\u1ee5ng c\u00f9ng v\u1eadt li\u1ec7u.<\/strong><\/p>\n<h3>T\u1ea1i sao tr\u01b0\u1eddng tr\u1edf n\u00ean m\u1ea1nh h\u01a1n<\/h3>\n<p>M\u1ed9t s\u1eafp x\u1ebfp nam ch\u00e2m truy\u1ec1n th\u1ed1ng g\u00e2y ra d\u00f2ng t\u1eeb b\u1ecb r\u00f2 r\u1ec9 ra nhi\u1ec1u h\u01b0\u1edbng. Nh\u01b0ng m\u1ed9t m\u1ea3ng Halbach xoay h\u01b0\u1edbng c\u1ee7a t\u1eebng nam ch\u00e2m \u0111\u1ec3 h\u01b0\u1edbng t\u1ea5t c\u1ea3 n\u0103ng l\u01b0\u1ee3ng \u0111\u00f3 v\u00e0o m\u1ed9t ph\u00eda t\u1eadp trung.<\/p>\n<h4>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng:<\/h4>\n<ul>\n<li>C\u00e1c c\u1ef1c b\u1eafc v\u00e0 c\u1ef1c nam c\u1ee7a m\u1ed7i nam ch\u00e2m \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp \u0111\u1ec3 c\u1ee7ng c\u1ed1 tr\u01b0\u1eddng \u1edf m\u1ed9t ph\u00eda.<\/li>\n<li>C\u00e1c tr\u01b0\u1eddng \u0111\u1ed1i l\u1eadp nhau s\u1ebd tri\u1ec7t ti\u00eau nhau \u1edf ph\u00eda ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n<li>K\u1ebft qu\u1ea3: t\u0103ng c\u01b0\u1eddng c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng, gi\u1ea3m c\u00e1c tr\u01b0\u1eddng l\u1ea1c h\u01b0\u1edbng.<\/li>\n<\/ul>\n<h4>V\u00ed d\u1ee5:<\/h4>\n<p>Gi\u1ea3 s\u1eed b\u1ea1n \u0111\u1eb7t m\u1ed9t h\u00e0ng g\u1ed3m b\u1ed1n nam ch\u00e2m:<\/p>\n<ul>\n<li>Trong h\u00e0ng truy\u1ec1n th\u1ed1ng, c\u00e1c tr\u01b0\u1eddng b\u1ecb r\u00f2 r\u1ec9 ph\u00eda tr\u00ean v\u00e0 ph\u00eda d\u01b0\u1edbi.<\/li>\n<li>Trong c\u1ea5u h\u00ecnh Halbach (xoay 0\u00b0, 90\u00b0, 180\u00b0, 270\u00b0), c\u00e1c tr\u01b0\u1eddng tri\u1ec7t ti\u00eau ph\u00eda d\u01b0\u1edbi v\u00e0 t\u1eadp trung ph\u00eda tr\u00ean.<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>C\u1ea5u h\u00ecnh<\/th>\n<th>Tr\u01b0\u1eddng b\u1ec1 m\u1eb7t \u0111\u1ec9nh (T\u01b0\u01a1ng \u0111\u1ed1i)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Nam ch\u00e2m truy\u1ec1n th\u1ed1ng<\/td>\n<td>1x<\/td>\n<\/tr>\n<tr>\n<td>M\u1ea3ng Halbach<\/td>\n<td>1,4 l\u1ea7n \u2013 2 l\u1ea7n<\/td>\n<\/tr>\n<tr>\n<td>V\u1edbi M\u1eb7t sau t\u1eeb t\u00ednh<\/td>\n<td>g\u1ea7n 1.2x<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ch\u00fang t\u00f4i \u0111\u00e3 ch\u1ebf t\u1ea1o m\u1ed9t rotor Halbach cho m\u1ed9t \u0111\u1ed9ng c\u01a1 kh\u00f4ng l\u00f5i \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u00f4-men xo\u1eafn cao h\u01a1n 15% tr\u00ean m\u1ed7i ampe. \u0110i\u1ec1u n\u00e0y gi\u00fap kh\u00e1ch h\u00e0ng c\u1ee7a ch\u00fang t\u00f4i gi\u1ea3m k\u00edch th\u01b0\u1edbc pin v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 nhi\u1ec7t.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>C\u00e1c m\u1ea3ng Halbach l\u00e0 m\u1ed9t c\u00e1ch th\u00f4ng minh, nh\u1ecf g\u1ecdn \u0111\u1ec3 ki\u1ec3m so\u00e1t t\u1eeb tr\u01b0\u1eddng. Ch\u00fang t\u1eadp trung s\u1ee9c m\u1ea1nh n\u01a1i c\u1ea7n thi\u1ebft v\u00e0 lo\u1ea1i b\u1ecf l\u00e3ng ph\u00ed\u2014ho\u00e0n h\u1ea3o cho \u0111\u1ed9ng c\u01a1, t\u1eeb tr\u01b0\u1eddng n\u00e2ng, v\u00e0 c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn.<\/p>\n<hr \/>","protected":false},"excerpt":{"rendered":"<p>Magnet m\u1ea3ng Halbach B\u1ea1n c\u00f3 c\u1ea7n m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u1edf m\u1ed9t ph\u00eda v\u00e0 g\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng \u1edf ph\u00eda kia kh\u00f4ng? C\u00f3 m\u1ed9t gi\u1ea3i ph\u00e1p\u2014kh\u00f4ng d\u00e2y, ch\u1ec9 d\u00f9ng nam ch\u00e2m. M\u1ea3ng Halbach l\u00e0 m\u1ed9t c\u00e1ch s\u1eafp x\u1ebfp th\u00f4ng minh c\u1ee7a c\u00e1c nam ch\u00e2m gi\u00fap t\u0103ng c\u01b0\u1eddng tr\u01b0\u1eddng t\u1eeb \u1edf m\u1eb7t n\u00e0y trong khi tri\u1ec7t ti\u00eau \u1edf m\u1eb7t kia. [...]<\/p>","protected":false},"author":1,"featured_media":1687,"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-1686","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/06\/IMG_0537-1.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1686","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=1686"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1686\/revisions"}],"predecessor-version":[{"id":1689,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1686\/revisions\/1689"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1687"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1686"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}