{"id":3644,"date":"2026-01-23T08:57:33","date_gmt":"2026-01-23T08:57:33","guid":{"rendered":"https:\/\/nbaem.com\/?p=3644"},"modified":"2026-06-27T12:22:17","modified_gmt":"2026-06-27T12:22:17","slug":"how-to-make-a-halbach-array-ring-magnet","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/how-to-make-a-halbach-array-ring-magnet\/","title":{"rendered":"C\u00e1ch l\u00e0m m\u1ed9t V\u00f2ng nam ch\u00e2m Halbach H\u01b0\u1edbng d\u1eabn chi ti\u1ebft t\u1eebng b\u01b0\u1edbc"},"content":{"rendered":"<h2>Hi\u1ec3u v\u1ec1 C\u1ea5u h\u00ecnh V\u00f2ng Halbach<\/h2>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i \u0111\u1ed1i x\u1eed v\u1edbi <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> nh\u01b0 \u0111\u1ec9nh cao c\u1ee7a k\u1ef9 thu\u1eadt t\u1eeb t\u00ednh. Kh\u00e1c v\u1edbi c\u00e1c t\u1ed5 h\u1ee3p t\u1eeb t\u00ednh ti\u00eau chu\u1ea9n, m\u1ed9t c\u1ea5u h\u00ecnh Halbach s\u1eed d\u1ee5ng m\u1ed9t v\u00f2ng quay \u0111\u1eb7c bi\u1ec7t c\u1ee7a c\u00e1c vector t\u1eeb \u0111\u1ec3 t\u1eadp trung tr\u01b0\u1eddng t\u1eeb \u1edf m\u1ed9t ph\u00eda trong khi hampir tri\u1ec7t ti\u00eau \u1edf ph\u00eda kia. Hi\u1ec7u \u1ee9ng \u201ct\u1ef1 che ch\u1eafn\u201d n\u00e0y cho ph\u00e9p ch\u00fang t\u00f4i \u0111\u1ea1t \u0111\u01b0\u1ee3c <strong>1.4x\u20132x m\u1eadt \u0111\u1ed9 flux cao h\u01a1n<\/strong> so v\u1edbi c\u00e1c s\u1eafp x\u1ebfp th\u00f4ng th\u01b0\u1eddng, l\u00e0m cho n\u00f3 tr\u1edf n\u00ean thi\u1ebft y\u1ebfu cho \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng t\u1eadp trung ch\u00ednh x\u00e1c.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-1004\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2022\/07\/Halbach-array-2.png\" alt=\"M\u1ea3ng Halbach 2\" width=\"400\" height=\"260\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2022\/07\/Halbach-array-2-200x130.png 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2022\/07\/Halbach-array-2-300x195.png 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2022\/07\/Halbach-array-2.png 400w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<h3>D\u00e3y tuy\u1ebfn t\u00ednh so v\u1edbi V\u00f2ng Halbach<\/h3>\n<p>Trong khi m\u1ed9t d\u00e3y tuy\u1ebfn t\u00ednh v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng ray ph\u1eb3ng c\u1ee7a nam ch\u00e2m \u0111\u01b0\u1ee3c d\u00f9ng cho \u0111\u1ed9ng c\u01a1 ph\u1eb3ng ho\u1eb7c c\u00e1c ch\u1ed1t \u0111\u00f3ng m\u1edf, m\u1ed9t<strong>\u00a0v\u00f2ng Halbach<\/strong>or <strong>halbach array cylinder<\/strong>) g\u00f3i logic \u0111\u00f3 v\u00e0o m\u1ed9t v\u00f2ng li\u00ean t\u1ee5c. Trong m\u1ed9t thi\u1ebft l\u1eadp tuy\u1ebfn t\u00ednh, tr\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u0103ng l\u00ean \u1edf m\u1ed9t m\u1eb7t. Trong m\u1ed9t thi\u1ebft l\u1eadp tr\u00f2n, h\u00ecnh h\u1ecdc bu\u1ed9c flux t\u1eeb v\u00e0o m\u1ed9t kh\u00f4ng gian gi\u1edbi h\u1ea1n \u2014 ho\u1eb7c l\u00e0 khoang b\u00ean trong, ho\u1eb7c l\u00e0 chu vi b\u00ean ngo\u00e0i \u2014 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng m\u1ea1nh h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi v\u00f2ng dipole ti\u00eau chu\u1ea9n m\u00e0 m\u1ed9t v\u00f2ng c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c.<\/p>\n<h3>C\u00e1c lo\u1ea1i ch\u00ednh: Tr\u01b0\u1eddng t\u1eadp trung ID so v\u1edbi Tr\u01b0\u1eddng t\u1eadp trung OD<\/h3>\n<p>Khi thi\u1ebft k\u1ebf m\u1ed9t <strong>v\u00f2ng Halbach m\u1ea3ng NdFeB<\/strong>, c\u00e2u h\u1ecfi \u0111\u1ea7u ti\u00ean ch\u00fang t\u00f4i h\u1ecfi l\u00e0: <em>B\u1ea1n c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n \u1edf \u0111\u00e2u?<\/em> \u0110\u1ecbnh h\u01b0\u1edbng c\u1ee7a c\u00e1c vect\u01a1 t\u1eeb t\u00ednh x\u00e1c \u0111\u1ecbnh xem flux b\u1ecb m\u1eafc k\u1eb9t b\u00ean trong hay \u0111\u01b0\u1ee3c chi\u1ebfu ra b\u00ean ngo\u00e0i.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"text-align: left;\"><strong>T\u1eadp trung theo tr\u01b0\u1eddng n\u1ed9i t\u1ea1i (ID-Focused)<\/strong><\/th>\n<th style=\"text-align: left;\"><strong>T\u1eadp trung theo tr\u01b0\u1eddng b\u00ean ngo\u00e0i (OD-Focused)<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>V\u1ecb tr\u00ed flux<\/strong><\/td>\n<td style=\"text-align: left;\">T\u1ee5 t\u1eadp \u1edf l\u1ed7 gi\u1eefa (Trung t\u00e2m l\u1ed7).<\/td>\n<td style=\"text-align: left;\">T\u1ee5 t\u1eadp tr\u00ean v\u00f2ng ngo\u00e0i.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ch\u1eafn t\u1eeb<\/strong><\/td>\n<td style=\"text-align: left;\">B\u00ean ngo\u00e0i l\u00e0 y\u00ean t\u0129nh t\u1eeb t\u00ednh.<\/td>\n<td style=\"text-align: left;\">B\u00ean trong l\u00e0 y\u00ean t\u0129nh t\u1eeb t\u00ednh.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110i\u1ec1u h\u01b0\u1edbng h\u1ea1t, r\u00e0ng bu\u1ed9c plasma, nam ch\u00e2m \u0111\u00f4i.<\/td>\n<td style=\"text-align: left;\">Rotor \u0111\u1ed9ng c\u01a1 DC kh\u00f4ng ch\u1ed5i than, gh\u00e9p t\u1eeb t\u1eeb t\u00ednh.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Logic thi\u1ebft k\u1ebf<\/strong><\/td>\n<td style=\"text-align: left;\">C\u00e1c vect\u01a1 quay \u0111\u1ec3 \u0111\u1ea9y flux h\u01b0\u1edbng v\u00e0o b\u00ean trong.<\/td>\n<td style=\"text-align: left;\">C\u00e1c vect\u01a1 quay \u0111\u1ec3 \u0111\u1ea9y flux h\u01b0\u1edbng ra ph\u00eda b\u00ean ngo\u00e0i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>M\u1eabu magnetization &amp; S\u1ed1 l\u01b0\u1ee3ng \u0111o\u1ea1n<\/h3>\n<p>\u0110i\u1ec1u k\u1ef3 di\u1ec7u c\u1ee7a m\u1ed9t <strong>m\u1eabu magnetization Halbach<\/strong> n\u1eb1m \u1edf v\u00f2ng quay tu\u1ea7n t\u1ef1 c\u1ee7a tr\u1ee5c d\u1ec5. \u0110\u1ed1i v\u1edbi m\u1ed9t h\u00ecnh tr\u1ee5 chu\u1ea9n, ch\u00fang ta \u043e\u0431\u044b\u0447\u043d\u043e s\u1eed d\u1ee5ng m\u1ed9t <strong>gi\u00e1 tr\u1ecb k<\/strong> (s\u1ed1 nguy\u00ean) \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a bao nhi\u00eau l\u1ea7n m\u1eabu flux l\u1eb7p l\u1ea1i quanh v\u00f2ng.<\/p>\n<p>\u0110\u1ec3 x\u00e2y d\u1ef1ng c\u00e1i n\u00e0y, ch\u00fang ta kh\u00f4ng ch\u1ec9 d\u00e1n t\u1eeb t\u00ednh l\u1ea1i v\u1edbi nhau ng\u1eabu nhi\u00ean. Ch\u00fang ta tu\u00e2n theo m\u1ed9t chu\u1ed7i \u0111\u1ecbnh h\u01b0\u1edbng nghi\u00eam ng\u1eb7t <strong>d\u00e3y \u0111\u1ecbnh h\u01b0\u1edbng 90\u00b0<\/strong>:<\/p>\n<ul>\n<li><strong>Segment 1:<\/strong> \u0111i\u1ec3m c\u1ef1c B\u1eafc ch\u1ec9 UP (B\u1eadc ph\u00e1t x\u1ea1 ngo\u00e0i)<\/li>\n<li><strong>Segment 2:<\/strong> \u0111i\u1ec3m c\u1ef1c B\u1eafc ch\u1ec9 RIGHT (B\u00e1n k\u00ednh) Chuy\u1ec3n<\/li>\n<li><strong>Ph\u00e2n \u0111o\u1ea1n 3:<\/strong> \u0110i\u1ec3m c\u1ef1c B\u1eafc CH\u1ec8 xu\u1ed1ng ( xuy\u00ean t\u00e2m v\u00e0o)<\/li>\n<li><strong>Ph\u00e2n \u0111o\u1ea1n 4:<\/strong> \u0110i\u1ec3m c\u1ef1c B\u1eafc CH\u1ec8 sang tr\u00e1i (h\u01b0\u1edbng tangential)<\/li>\n<\/ul>\n<p>Chu k\u1ef3 n\u00e0y l\u1eb7p l\u1ea1i. S\u1ef1 m\u01b0\u1ee3t m\u00e0 c\u1ee7a ph\u00e2n b\u1ed1 s\u00f3ng sin c\u1ea3i thi\u1ec7n khi c\u00f3 nhi\u1ec1u ph\u00e2n \u0111o\u1ea1n tr\u00ean m\u1ed7i c\u1ef1c. Trong khi 4 ph\u00e2n \u0111o\u1ea1n tr\u00ean m\u1ed7i c\u1ef1c l\u00e0 ti\u00eau chu\u1ea9n, c\u00e1c \u1ee9ng d\u1ee5ng cao c\u1ea5p th\u01b0\u1eddng y\u00eau c\u1ea7u 8 ho\u1eb7c nhi\u1ec1u h\u01a1n \u0111\u1ec3 gi\u1ea3m \u201cg\u00f5 m\u00f2ng\u201d v\u00e0 t\u1ed1i \u01b0u \u0111\u1ed3ng nh\u1ea5t tr\u01b0\u1eddng.<\/p>\n<h3>C\u1ea5u tr\u00fac Arc \u0110\u01a1n Piece so v\u1edbi Arc \u0111\u01b0\u1ee3c Chia th\u00e0nh \u0110o\u1ea1n<\/h3>\n<p>T\u1ea1o ra m\u1ed9t <strong>c\u1ef1c t\u1eeb th\u00f4ng m\u1ed9t m\u1eb7t<\/strong> \u0111\u00f3ng vai tr\u00f2 l\u1ef1a ch\u1ecdn s\u1ea3n xu\u1ea5t:<\/p>\n<ul>\n<li><strong>C\u1ea5u tr\u00fac Arc \u0111\u01b0\u1ee3c Chia th\u00e0nh \u0110o\u1ea1n:<\/strong> \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. Ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t t\u1eebng \u0111o\u1ea1n h\u00ecnh ngh\u1ecbch ho\u1eb7c cung (th\u01b0\u1eddng <strong>Nguy\u00ean li\u1ec7u N\u00ea-odym \u0111\u01b0\u1ee3c luy\u1ec7n sinter<\/strong> or <strong>SmCo<\/strong>) v\u1edbi h\u01b0\u1edbng t\u1eeb h\u00f3a c\u1ee5 th\u1ec3 v\u00e0 d\u00ednh ch\u00fang th\u00e0nh m\u1ed9t v\u00f2ng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng l\u1edbn v\u00e0 s\u1eed d\u1ee5ng c\u00e1c c\u1ea5p N54 m\u1ea1nh nh\u1ea5t.<\/li>\n<li><strong>M\u1ed9t m\u1eb7t \u0110a c\u1ef1c:<\/strong> \u0110\u1ed1i v\u1edbi c\u1ea3m bi\u1ebfn nh\u1ecf h\u01a1n ho\u1eb7c d\u1ee5ng c\u1ee5 \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 ch\u1ebf t\u1ea1o m\u1ed9t v\u00f2ng \u0111\u1ed3ng nh\u1ea5t duy nh\u1ea5t v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t khung t\u1eeb tr\u01b0\u1eddng \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 in m\u1eabu Halbach. Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y ph\u1ed5 bi\u1ebfn cho k\u1ebft qu\u1ea3 c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb th\u00f4ng th\u1ea5p h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p l\u1eafp r\u00e1p ph\u00e2n m\u1ea3nh m\u00e0 ch\u00fang t\u00f4i s\u1eed d\u1ee5ng cho r\u00f4to n\u1eb7ng.<\/li>\n<\/ul>\n<h2>Nguy\u00ean v\u1eadt li\u1ec7u v\u00e0 C\u00f4ng c\u1ee5 Y\u00eau c\u1ea7u cho Tassembly<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-large wp-image-3642\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-1024x643.webp\" alt=\"\" width=\"1024\" height=\"643\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-18x12.webp 18w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-200x126.webp 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-300x188.webp 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-320x202.webp 320w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-400x251.webp 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-600x377.webp 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-700x441.webp 700w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-768x483.webp 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-800x503.webp 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754-1024x643.webp 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Halbach_array_ring_magnet_assembly_tools_gRXd63lMJ-e1769143038754.webp 1060w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3>Nam ch\u00e2m \u0111\u01b0\u1ee3c Khuy\u1ebfn ngh\u1ecb: Neodymium so v\u1edbi Samarium Cobalt<\/h3>\n<p>L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb t\u00ednh ph\u00f9 h\u1ee3p l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a hi\u1ec7u su\u1ea5t cao <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong>. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u m\u1eadt \u0111\u1ed9 flux t\u1ed1i \u0111a, ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb <strong>Neodymium Sintered (NdFeB)<\/strong>. Kho h\u00e0ng c\u1ee7a ch\u00fang t\u00f4i dao \u0111\u1ed9ng t\u1eeb c\u1ea5p N35 \u0111\u1ebfn N54, cung c\u1ea5p s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh c\u1ef1c k\u1ef3 c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 t\u0103ng hi\u1ec7u su\u1ea5t 1,4x\u20132x c\u1ee7a c\u1ea5u h\u00ecnh Halbach.<\/p>\n<p>Tuy nhi\u00ean, n\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh cao, nh\u01b0 c\u00e1c \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p c\u1ee5 th\u1ec3, <strong>Cobalt Samari (SmCo)<\/strong> l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u. Kh\u00e1c v\u1edbi neodymium chu\u1ea9n, SmCo duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh trong c\u00e1c m\u00f4i tr\u01b0\u1eddng l\u00ean t\u1edbi 300\u00b0C. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n k\u1ef9 thu\u1eadt ti\u00ean ti\u1ebfn, vi\u1ec7c k\u1ebft h\u1ee3p <a href=\"https:\/\/nbaem.com\/vi\/products\/laminated-magnet\/\" target=\"_blank\" rel=\"noopener\">c\u1ea5u tr\u00fac nam ch\u00e2m gh\u00e9p<\/a> c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m h\u01a1n n\u1eefa th\u1ea5t tho\u00e1t d\u00f2ng xo\u00e1y trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 cao.<\/p>\n<h3>C\u00e1c c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu cho l\u1eafp r\u00e1p ch\u00ednh x\u00e1c<\/h3>\n<p>B\u1ea1n kh\u00f4ng th\u1ec3 l\u1eafp r\u00e1p m\u1ed9t <strong>nam ch\u00e2m h\u00ecnh tr\u1ee5 Halbach<\/strong> b\u1eb1ng tay tr\u1ea7n do l\u1ef1c \u0111\u1ea9y gi\u1eefa c\u00e1c ph\u1ea7n m\u1ec1m m\u1ea1nh. C\u00e1c c\u00f4ng c\u1ee5 sau \u0111\u00e2y l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c \u0111\u1ec3 x\u00e2y d\u1ef1ng an to\u00e0n:<\/p>\n<ul>\n<li><strong>Jig L\u1eafp r\u00e1p Kh\u00f4ng t\u1eeb t\u00ednh:<\/strong> M\u1ed9t fixtue \u0111\u01b0\u1ee3c gia c\u00f4ng t\u00f9y ch\u1ec9nh (th\u01b0\u1eddng b\u1eb1ng nh\u00f4m ho\u1eb7c nh\u1ef1a c\u1ee9ng) l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1eef t\u1eebng ph\u1ea7n trong v\u1ecb tr\u00ed trong qu\u00e1 tr\u00ecnh li\u00ean k\u1ebft.<\/li>\n<li><strong>Epoxy C\u1ea5u tr\u00fac:<\/strong> Ch\u1ea5t k\u1ebft d\u00ednh c\u00f4ng nghi\u1ec7p \u0111\u1ed9 b\u1ec1n cao l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c l\u1ef1c t\u1eeb tr\u01b0\u1eddng \u0111ang c\u1ed1 g\u1eafng \u0111\u1ea9y v\u00e0nh v\u1ec1 v\u1edbi nhau.<\/li>\n<li><strong>Ng\u01b0\u1eddi xem Pole t\u1eeb t\u00ednh:<\/strong> Vi\u1ec7c xem phim ho\u1eb7c c\u1ea3m bi\u1ebfn c\u1ef1c t\u1eeb r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 x\u00e1c nh\u1eadn tr\u00ecnh t\u1ef1 \u0111\u1ecbnh h\u01b0\u1edbng 90\u00b0 tr\u01b0\u1edbc khi d\u00e1n.<\/li>\n<\/ul>\n<h3>Thi\u1ebft b\u1ecb t\u00f9y ch\u1ecdn cho k\u1ebft qu\u1ea3 chuy\u00ean nghi\u1ec7p<\/h3>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o <strong>m\u1ea3ng Halbach h\u00ecnh v\u00f2ng<\/strong> \u0111\u1ea1t dung sai nghi\u00eam ng\u1eb7t, th\u01b0\u1edbc \u0111o ch\u00ednh x\u00e1c h\u1eefu \u00edch cho vi\u1ec7c \u0111o l\u1eafp gh\u00e9p c\u00e1c \u0111o\u1ea1n. Th\u00eam v\u00e0o \u0111\u00f3, vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t v\u1ecf bao ngo\u00e0i kh\u00f4ng t\u1eeb t\u00ednh (\u1ed1ng b\u1ecdc) b\u1eb1ng s\u1ee3i carbon ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 cung c\u1ea5p gia c\u1ed1 c\u1ea5u tr\u00fac b\u00ean ngo\u00e0i, ng\u0103n m\u1ea3ng v\u1ee1 tan d\u01b0\u1edbi \u00e1p l\u1ef1c t\u1eeb tr\u01b0\u1eddng c\u1ee7a n\u00f3. \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi thi\u1ebfu thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng, c\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/service\/\">d\u1ecbch v\u1ee5 k\u1ef9 thu\u1eadt<\/a> c\u1ee7a ch\u00fang t\u00f4i<\/p>\n<h2>\u0111\u01b0a ra m\u1ed9t l\u1ef1a ch\u1ecdn \u0111\u00e1ng tin c\u1eady cho vi\u1ec7c ch\u1ebf t\u1ea1o DIY, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c tu\u00e2n th\u1ee7 ISO.<\/h2>\n<p>C\u00e1c c\u00e2n nh\u1eafc an to\u00e0n: C\u00e1c b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean quan tr\u1ecdng <strong>X\u00e2y d\u1ef1ng m\u1ed9t<\/strong> v\u00f2ng Halbach Nd-Fe-B <strong>\u0111\u00f2i h\u1ecfi qu\u1ea3n l\u00fd c\u00e1c l\u1ef1c c\u1ef1c \u0111oan m\u00e0 vi\u1ec7c x\u1eed l\u00fd nam ch\u00e2m ti\u00eau chu\u1ea9n s\u1ebd kh\u00f4ng chu\u1ea9n b\u1ecb b\u1ea1n tr\u01b0\u1edbc. Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t m\u1ea3ng Halbach l\u00e0 bu\u1ed9c c\u00e1c vect\u01a1 t\u1eeb \u0111\u1ec3 \u0111\u1ed1i kh\u00e1ng l\u1eabn nhau nh\u1eb1m t\u1ea1o ra m\u1ed9t<\/strong>. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra n\u0103ng l\u01b0\u1ee3ng ti\u1ec1m n\u0103ng kh\u1ed5ng l\u1ed3 trong l\u1eafp r\u00e1p. N\u1ebfu m\u1ed9t \u0111o\u1ea1n tr\u01b0\u1ee3t trong qu\u00e1 tr\u00ecnh, nam ch\u00e2m c\u00f3 th\u1ec3 va \u0111\u1eadp v\u1edbi nhau v\u1edbi v\u1eadn t\u1ed1c \u0111\u1ee7 \u0111\u1ec3 l\u00e0m v\u1ee1 v\u1eadt li\u1ec7u NdFeB sintered gi\u00f2n, khi\u1ebfn c\u00e1c m\u1ea3nh s\u1eafc nh\u1ecdn bay tung l\u00ean kh\u1eafp ph\u00f2ng. Ch\u00fang t\u00f4i xem nguy c\u01a1 n\u00e0y v\u1edbi s\u1ef1 nghi\u00eam t\u00fac tuy\u1ec7t \u0111\u1ed1i t\u1ea1i c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p c\u1ee7a m\u00ecnh.<\/p>\n<p>\u0110\u1ec3 qu\u1ea3n l\u00fd \u0111\u00fang c\u00e1ch nh\u1eefng <strong>C\u00e1c bi\u1ec7n ph\u00e1p an to\u00e0n cho m\u1ea3ng Halbach<\/strong>, vi\u1ec7c thi\u1ebft l\u1eadp kh\u00f4ng gian l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n l\u00e0 r\u1ea5t quan tr\u1ecdng. B\u1ea1n ph\u1ea3i l\u00e0m s\u1ea1ch khu v\u1ef1c kh\u1ecfi m\u1ecdi ph\u1ea7n kim lo\u1ea1i s\u1eaft r\u01a1i t\u1ef1 do tr\u01b0\u1edbc khi mang b\u1ea5t k\u1ef3 nam ch\u00e2m n\u00e0o v\u00e0o ph\u00f2ng. Ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb m\u1ea1nh m\u1ebd s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 kh\u00f4ng t\u1eeb t\u00ednh l\u00e0m b\u1eb1ng \u0111\u1ed3ng thau, nh\u1ef1a, ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng t\u1eeb t\u00ednh. C\u00e1c c\u00f4ng c\u1ee5 b\u1eb1ng th\u00e9p ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh v\u1eadt th\u1ec3 bay nguy hi\u1ec3m n\u1ebfu b\u1ecb k\u00e9o v\u00e0o flux t\u1eadp trung c\u1ee7a m\u1ea3ng.<\/p>\n<p><strong>Trang b\u1ecb an to\u00e0n thi\u1ebft y\u1ebfu v\u00e0 Quy tr\u00ecnh:<\/strong><\/p>\n<ul>\n<li><strong>B\u1ea3o v\u1ec7 m\u1eaft:<\/strong> Lu\u00f4n \u0111\u1ed9i k\u00ednh b\u1ea3o h\u1ed9 ch\u1ed1ng va \u0111\u1eadp c\u00f3 che quai hai b\u00ean \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c m\u1ea3nh nam ch\u00e2m bay.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 tay:<\/strong> S\u1eed d\u1ee5ng g\u0103ng tay c\u1ee1 l\u1edbn. L\u1ef1c k\u1eb9p gi\u1eefa c\u00e1c \u0111o\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 g\u00e2y ph\u1ed3ng r\u1ed9p ch\u1ea3y m\u00e1u nghi\u00eam tr\u1ecdng ho\u1eb7c ch\u1ea5n th\u01b0\u01a1ng nghi\u1ec1n n\u00e1t.<\/li>\n<li><strong>Kho\u1ea3ng c\u00e1ch \u0111i\u1ec7n t\u1eed:<\/strong> Gi\u1eef \u0111i\u1ec7n tho\u1ea1i, \u0111\u1ed3ng h\u1ed3 v\u00e0 th\u1ebb t\u00edn d\u1ee5ng c\u00e1ch t\u1ed1i thi\u1ec3u 1 m\u00e9t. L\u01b0u l\u01b0\u1ee3ng flux t\u1eadp trung m\u1ea1nh h\u01a1n nhi\u1ec1u so v\u1edbi nam ch\u00e2m th\u00f4ng th\u01b0\u1eddng.<\/li>\n<li><strong>G\u1eafn c\u1ed1 \u0111\u1ecbnh an to\u00e0n:<\/strong> Kh\u00f4ng bao gi\u1edd c\u1ed1 g\u1eafng gi\u1eef c\u00e1c \u0111o\u1ea1n b\u1eb1ng tay. S\u1eed d\u1ee5ng khu\u00f4n c\u1ed1 \u0111\u1ecbnh chuy\u00ean d\u1ee5ng ho\u1eb7c <a href=\"https:\/\/nbaem.com\/vi\/products\/magnet-assembly\/\" target=\"_blank\" rel=\"noopener\">b\u1ed9 nam ch\u00e2m<\/a> fixture chuy\u00ean nghi\u1ec7p \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n h\u01b0\u1edbng quay m\u1ed9t c\u00e1ch an to\u00e0n.<\/li>\n<\/ul>\n<h2>H\u01b0\u1edbng d\u1eabn T\u1eebng b\u01b0\u1edbc \u0111\u1ec3 X\u00e2y d\u1ef1ng V\u00f2ng Nam ch\u00e2m Halbach<\/h2>\n<p>C\u00e1c c\u00e2n nh\u1eafc an to\u00e0n: C\u00e1c b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean quan tr\u1ecdng <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c bi\u1ebfn \u0111\u1ed5i nam ch\u00e2m v\u6c38\u4e45\u1ecb t\u0129nh chu\u1ea9n th\u00e0nh m\u1ed9t th\u1ea5u k\u00ednh t\u1eeb tr\u01b0\u1eddng t\u1eadp trung. Kh\u00e1c v\u1edbi vi\u1ec7c x\u1ebfp ch\u1ed3ng c\u00e1c \u0111\u0129a \u0111\u01a1n gi\u1ea3n, qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u00f2i h\u1ecfi v\u01b0\u1ee3t qua c\u00e1c l\u1ef1c \u0111\u1ea9y t\u1eeb m\u1ea1nh \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u1ea1ch t\u1eeb t\u1ef1 che ch\u1eafn. Cho d\u00f9 b\u1ea1n \u0111ang x\u00e2y m\u1ed9t \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao hay m\u1ed9t thi\u1ebft b\u1ecb nghi\u00ean c\u1ee9u, vi\u1ec7c tu\u00e2n th\u1ee7 m\u1ed9t <strong>H\u01b0\u1edbng d\u1eabn v\u00f2ng Halbach DIY<\/strong> c\u1ea5u tr\u00fac l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u00e0nh c\u00f4ng m\u00e0 kh\u00f4ng g\u1eb7p ch\u1ea5n th\u01b0\u01a1ng ho\u1eb7c l\u00e3ng ph\u00ed v\u1eadt li\u1ec7u.<\/p>\n<h3>B\u01b0\u1edbc 1: Thi\u1ebft k\u1ebf v\u00e0 L\u1eadp k\u1ebf ho\u1ea1ch \u0110\u01b0\u1eddng k\u00ednh V\u00f2ng<\/h3>\n<p>Tr\u01b0\u1edbc khi ch\u1ea1m v\u00e0o m\u1ed9t nam ch\u00e2m n\u00e0o, b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh h\u00ecnh h\u1ecdc. B\u1ea1n \u0111ang x\u00e2y m\u1ed9t <strong>nam ch\u00e2m h\u00ecnh tr\u1ee5 Halbach<\/strong> (k=2) \u0111\u1ec3 t\u1eadp trung tr\u01b0\u1eddng b\u00ean trong l\u1ed7 khoan, hay m\u1ed9t m\u1ea3ng t\u1eadp trung OD?<\/p>\n<ul>\n<li><strong>S\u1ed1 l\u01b0\u1ee3ng Segment:<\/strong> Quy\u1ebft \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng ph\u1ea7n gh\u00e9p m\u1ed7i v\u00f2ng (th\u01b0\u1eddng l\u00e0 8, 12 ho\u1eb7c 16). Nhi\u1ec1u segment t\u1ea1o ra tr\u01b0\u1eddng sinuos t\u1ed1t h\u01a1n nh\u01b0ng t\u0103ng \u0111\u1ed9 kh\u00f3 l\u1eafp r\u00e1p.<\/li>\n<li><strong>Dung sai:<\/strong> Ph\u1ea3i t\u00ednh \u0111\u1ebfn kho\u1ea3ng c\u00e1ch keo d\u00e1n. N\u1ebfu thi\u1ebft k\u1ebf qu\u00e1 ch\u1eadt, nam ch\u00e2m s\u1ebd kh\u00f4ng v\u1eeba; qu\u00e1 l\u1ecfng, s\u1ef1 c\u0103n ch\u1ec9nh s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 2: Chu\u1ea9n b\u1ecb Nam ch\u00e2m v\u00e0 \u0110\u00e1nh d\u1ea5u \u0110\u1ed9 t\u1eeb tr\u01b0\u1eddng<\/h3>\n<p>Chu\u1ea9n b\u1ecb l\u00e0 giai \u0111o\u1ea1n quan tr\u1ecdng nh\u1ea5t. B\u1ea1n ph\u1ea3i nh\u1eadn di\u1ec7n v\u00e0 \u0111\u00e1nh d\u1ea5u c\u1ef1c B\u1eafc tr\u00ean m\u1ed7i ph\u1ea7n gh\u00e9p. M\u1ed9t sai s\u00f3t \u1edf \u0111\u00e2y s\u1ebd l\u00e0m h\u1ecfng to\u00e0n b\u1ed9 <strong>m\u1ea3ng Halbach h\u00ecnh v\u00f2ng<\/strong>.<\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng m\u1ed9t nam ch\u00e2m tham kh\u1ea3o \u0111\u1ec3 ki\u1ec3m tra t\u1eebng m\u1ea3nh.<\/li>\n<li>\u0110\u00e1nh d\u1ea5u h\u01b0\u1edbng t\u1eeb h\u00f3a m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng b\u1eb1ng b\u00fat d\u1ea1 v\u0129nh vi\u1ec5n.<\/li>\n<li>Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c gi\u1edbi h\u1ea1n s\u1ea3n xu\u1ea5t c\u1ee7a nguy\u00ean li\u1ec7u th\u00f4 \u1edf \u0111\u00e2y l\u00e0 h\u1eefu \u00edch; bi\u1ebft <a href=\"https:\/\/nbaem.com\/vi\/how-to-make-ndfeb-magnet\/\" target=\"_blank\" rel=\"noopener\">c\u00e1ch l\u00e0m nam ch\u00e2m NdFeB<\/a> mang l\u1ea1i c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 l\u00fd do t\u1ea1i sao ph\u01b0\u01a1ng h\u01b0\u1edbng h\u1ea1t \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh v\u00e0 kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 3: X\u00e2y d\u1ef1ng Jig L\u1eafp Gh\u00e9p C\u00f3 V\u00f2ng R\u00e3nh<\/h3>\n<p>B\u1ea1n kh\u00f4ng th\u1ec3 l\u1eafp r\u00e1p m\u1ed9t <strong>v\u00f2ng Halbach neodymium<\/strong> b\u1eb1ng tay. L\u1ef1c \u0111\u1ea9y t\u1eeb s\u1ebd qu\u00e1 m\u1ea1nh. B\u1ea1n c\u1ea7n m\u1ed9t jig l\u1eafp gh\u00e9p Halbach t\u00f9y ch\u1ec9nh <strong>jig l\u1eafp gh\u00e9p Halbach<\/strong>.<\/p>\n<ul>\n<li><strong>V\u1eadt li\u1ec7u:<\/strong> S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u phi t\u1eeb t\u00ednh nh\u01b0 nh\u00f4m, \u0111\u1ed3ng thau, ho\u1eb7c PETG in 3D c\u00f3 \u0111\u1ed9 in cao<\/li>\n<li><strong>Thi\u1ebft k\u1ebf:<\/strong> T\u1ea1o m\u1ed9t \u201c\u1ed0ng c\u00f3 khe\u201d ho\u1eb7c v\u00f2ng c\u00f3 r\u00e3nh \u0111\u1ec3 gi\u1eef m\u1ed7i \u0111o\u1ea1n \u1edf v\u1ecb tr\u00ed h\u00ecnh h\u1ecdc ch\u00ednh x\u00e1c c\u1ee7a n\u00f3 trong khi cho ph\u00e9p b\u1ea1n tr\u01b0\u1ee3t t\u1eebng \u0111o\u1ea1n t\u1eebng c\u00e1i m\u1ed9t.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: L\u1eafp r\u00e1p tu\u1ea7n t\u1ef1 v\u00e0 quay<\/h3>\n<p>\u0110\u00e2y l\u00e0 n\u01a1i <strong>tr\u00ecnh t\u1ef1 \u0111\u1ecbnh h\u01b0\u1edbng Halbach<\/strong> \u0111\u00f3ng vai tr\u00f2. B\u1ea1n kh\u00f4ng \u0111\u1eb7t nam ch\u00e2m v\u1edbi c\u1ef1c xen k\u1ebd (N-S-N-S). Thay v\u00e0o \u0111\u00f3, b\u1ea1n \u0111ang quay vect\u01a1 magnetization.<\/p>\n<ul>\n<li><strong>M\u1eabu:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed9t m\u1ea3ng chu\u1ea9n, m\u1eabu th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn vi\u1ec7c quay magnetization 90 \u0111\u1ed9 cho m\u1ed7i \u0111o\u1ea1n ti\u1ebfp theo (v\u00ed d\u1ee5: L\u00ean, Ph\u1ea3i, Xu\u1ed1ng, Tr\u00e1i).<\/li>\n<li><strong>Ch\u00e8n:<\/strong> Tr\u01b0\u1ee3t vi\u00ean magnet \u0111\u1ea7u ti\u00ean v\u00e0o trong jig. G\u1eafn c\u1ed1 \u0111\u1ecbnh n\u00f3.<\/li>\n<li><strong>Cu\u1ed9c chi\u1ebfn:<\/strong> Khi b\u1ea1n ch\u00e8n magnet ti\u1ebfp theo, n\u00f3 s\u1ebd ch\u1ed1ng l\u1ea1i b\u1ea1n. N\u00f3 s\u1ebd c\u1ed1 g\u1eafng v\u1eb7n ho\u1eb7c nh\u1ea3y ra. S\u1eed d\u1ee5ng k\u1eb9p kh\u00f4ng t\u1eeb t\u00ednh \u0111\u1ec3 \u00e9p n\u00f3 v\u00e0o khe c\u1ea1nh v\u1edbi khe th\u1ee9 nh\u1ea5t.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 5: B\u1ecdc b\u1eb1ng epoxy c\u00f3 \u0111\u1ed9 b\u1ec1n cao<\/h3>\n<p>M\u1ed9t khi c\u00e1c \u0111o\u1ea1n \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1eb9p c\u1ed1 \u0111\u1ecbnh, ch\u00fang \u0111ang ch\u1ecbu \u00e1p l\u1ef1c r\u1ea5t l\u1edbn.<\/p>\n<ul>\n<li>\u00c1p d\u1ee5ng epoxy k\u1ebft c\u1ea5u \u1edf c\u1ea5p \u0111\u1ed9 cao (nh\u01b0 Loctite ho\u1eb7c c\u00e1c ch\u1ea5t k\u1ebft d\u00ednh magnet \u0111\u1eb7c th\u00f9) l\u00ean c\u00e1c b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac.<\/li>\n<li><strong>Kh\u00f4ng s\u1eed d\u1ee5ng keo si\u00eau d\u00ednh th\u00f4ng th\u01b0\u1eddng<\/strong>; n\u00f3 gi\u00f2n v\u00e0 th\u01b0\u1eddng v\u1ee1 d\u01b0\u1edbi shear stress c\u1ee7a m\u1ed9t <strong>\u0111\u00f2i h\u1ecfi qu\u1ea3n l\u00fd c\u00e1c l\u1ef1c c\u1ef1c \u0111oan m\u00e0 vi\u1ec7c x\u1eed l\u00fd nam ch\u00e2m ti\u00eau chu\u1ea9n s\u1ebd kh\u00f4ng chu\u1ea9n b\u1ecb b\u1ea1n tr\u01b0\u1edbc. Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t m\u1ea3ng Halbach l\u00e0 bu\u1ed9c c\u00e1c vect\u01a1 t\u1eeb \u0111\u1ec3 \u0111\u1ed1i kh\u00e1ng l\u1eabn nhau nh\u1eb1m t\u1ea1o ra m\u1ed9t<\/strong>.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 6: Ph\u1ee5c h\u1ed3i v\u00e0 th\u00e1o an to\u00e0n<\/h3>\n<p>\u0110\u1ec3 epoxy kh\u00f4 ho\u00e0n to\u00e0n theo th\u1eddi gian khuy\u1ebfn ngh\u1ecb \u0111\u1ea7y \u0111\u1ee7 (th\u01b0\u1eddng 24 gi\u1edd). \u0110\u1eebng v\u1ed9i v\u00e0ng. Khi \u0111\u00e3 kh\u00f4, <strong>v\u00f2ng bi nam ch\u00e2m v\u0129nh vi\u1ec5n<\/strong> \u0111\u01b0\u1ee3c t\u1ef1 h\u1ed7 tr\u1ee3.<\/p>\n<ul>\n<li>\u0110\u1ea9y c\u01a1 h\u1ecdc v\u00f2ng ra kh\u1ecfi jig.<\/li>\n<li>C\u1ea7m n\u1eafm h\u1ebft s\u1ee9c c\u1ea9n th\u1eadn \u2014 tr\u01b0\u1eddng t\u1eeb tr\u01b0\u1eddng hi\u1ec7n \u0111ang \u201cs\u1ed1ng\u201d v\u00e0 r\u1ea5t t\u1eadp trung.<\/li>\n<\/ul>\n<h2>C\u00e1c th\u1ee7 t\u1ee5c ki\u1ec3m tra v\u00e0 x\u00e1c nh\u1eadn<\/h2>\n<p>M\u1ed9t khi epoxy \u0111\u00e3 ho\u00e0n to\u00e0n \u0111\u00f3ng r\u1eafn, vi\u1ec7c x\u00e1c minh h\u01b0\u1edbng tr\u01b0\u1eddng t\u1eeb t\u00ednh l\u00e0 r\u1ea5t quan tr\u1ecdng tr\u01b0\u1edbc khi t\u00edch h\u1ee3p th\u00e0nh ph\u1ea7n v\u00e0o h\u1ec7 th\u1ed1ng l\u1edbn h\u01a1n. V\u00ec m\u1ed9t <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> d\u1ef1a tr\u00ean quay vector ch\u00ednh x\u00e1c, m\u1ed9t th\u1eed nghi\u1ec7m k\u00e9o \u0111\u01a1n gi\u1ea3n l\u00e0 kh\u00f4ng \u0111\u1ee7. Ch\u00fang ta c\u1ea7n x\u00e1c nh\u1eadn r\u1eb1ng l\u01b0u l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng t\u1eadp trung \u1edf ph\u00eda m\u1ee5c ti\u00eau (ID ho\u1eb7c OD) v\u00e0 b\u1ecb tri\u1ec7t ti\u00eau hi\u1ec7u qu\u1ea3 \u1edf ph\u00eda c\u00f2n l\u1ea1i.<\/p>\n<h3>H\u00ecnh dung tr\u01b0\u1eddng<\/h3>\n<p>C\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 ki\u1ec3m tra t\u1ed5 h\u1ee3p l\u00e0 s\u1eed d\u1ee5ng <strong>m\u00e0ng nh\u00ecn t\u1eeb t\u1eeb b\u1eb1ng t\u1eeb t\u00ednh<\/strong>. Khi \u0111\u1eb7t gi\u1eefa m\u1eb7t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u00f2ng, m\u00e0ng phim n\u00ean hi\u1ec3n th\u1ecb m\u1ed9t m\u00f4 h\u00ecnh tr\u01b0\u1eddng d\u00e0y \u0111\u1eb7c, li\u00ean t\u1ee5c. Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u1eb7t m\u00e0ng phim \u1edf ph\u00eda \u0111\u01b0\u1ee3c che ch\u1eafn s\u1ebd cho th\u1ea5y ph\u1ea3n \u1ee9ng y\u1ebfu \u0111i \u0111\u00e1ng k\u1ec3 ho\u1eb7c b\u1ecb \u201cm\u1edd\u201d. S\u1ef1 x\u00e1c nh\u1eadn b\u1eb1ng tr\u1ef1c quan n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng <strong>d\u00e3y \u0111\u1ecbnh h\u01b0\u1edbng 90\u00b0<\/strong> \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u00fang trong qu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o.<\/p>\n<h3>\u0110o m\u1eadt \u0111\u1ed9 flux<\/h3>\n<p>\u0110\u1ed1i v\u1edbi x\u00e1c nh\u1eadn \u1edf c\u1ea5p \u0111\u1ed9 k\u1ef9 thu\u1eadt, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng m\u1ed9t m\u00e1y \u0111o gauss \u0111\u00e3 hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111o <strong>m\u1eadt \u0111\u1ed9 flux<\/strong>.<\/p>\n<ul>\n<li><strong>N\u1eeda ph\u00eda ho\u1ea1t \u0111\u1ed9ng:<\/strong> C\u00e1c m\u1ee9c \u0111o n\u00ean cao \u0111\u00e1ng k\u1ec3 so v\u1edbi m\u1ed9t nam ch\u00e2m r\u00eca chu\u1ea9n c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng.<\/li>\n<li><strong>N\u1eeda ph\u00eda \u0111\u01b0\u1ee3c che ch\u1eafn:<\/strong> C\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng n\u00ean g\u1ea7n b\u1eb1ng zero, ch\u1ee9ng t\u1ecf hi\u1ec7u \u1ee9ng t\u1ef1 che ch\u1eafn \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h3>So s\u00e1nh hi\u1ec7u n\u0103ng<\/h3>\n<p>M\u1ed9t chi\u1ebfc xilanh Halbach \u0111\u01b0\u1ee3c l\u1eafp \u0111\u00fang c\u00e1ch cho th\u1ea5y <strong>t\u0103ng 1,4x \u0111\u1ebfn 2x m\u1eadt \u0111\u1ed9 flux<\/strong> so v\u1edbi c\u00e1c s\u1eafp x\u1ebfp truy\u1ec1n th\u1ed1ng. Trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, s\u1ef1 t\u0103ng n\u00e0y cho ph\u00e9p gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3 m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t c\u00f4ng su\u1ea5t. Ch\u00ednh s\u1ef1 hi\u1ec7u qu\u1ea3 n\u00e0y l\u00e0 l\u00fd do c\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/products\/magnetic-motor-assembly\/\" target=\"_blank\" rel=\"noopener\">b\u1ed9 \u0111\u1ed9ng c\u01a1 t\u1eeb t\u00ednh hi\u1ec7u su\u1ea5t cao<\/a> s\u1eed d\u1ee5ng c\u1ea5u h\u00ecnh n\u00e0y \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a m\u00f4-men xo\u1eafn trong khi lo\u1ea1i b\u1ecf l\u1edbp che ch\u1eafn s\u1eaft ph\u00eda l\u01b0ng n\u1eb7ng. N\u1ebfu c\u00e1c ph\u00e9p \u0111o c\u1ee7a b\u1ea1n kh\u00f4ng cho th\u1ea5y s\u1ef1 khu\u1ebfch \u0111\u1ea1i n\u1ed5i b\u1eadt n\u00e0y, c\u00f3 th\u1ec3 c\u00e1ch s\u1eafp x\u1ebfp c\u00e1c \u0111o\u1ea1n c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u1ea1i.<\/p>\n<h2>Th\u00e1ch th\u1ee9c ph\u1ed5 bi\u1ebfn v\u00e0 x\u1eed l\u00fd s\u1ef1 c\u1ed1<\/h2>\n<p>C\u00e1c c\u00e2n nh\u1eafc an to\u00e0n: C\u00e1c b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean quan tr\u1ecdng <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> kh\u00f4ng gi\u1ed1ng nh\u01b0 vi\u1ec7c x\u1ebfp ch\u1ed3ng nam ch\u00e2m ti\u00eau chu\u1ea9n; v\u1eadt l\u00fd s\u1ebd \u0111\u1ea5u tranh v\u1edbi b\u1ea1n t\u1eebng b\u01b0\u1edbc. Ngay c\u1ea3 v\u1edbi k\u1ebf ho\u1ea1ch v\u1eefng ch\u1eafc, v\u1eabn c\u00f3 th\u1ec3 ph\u00e1t sinh v\u1ea5n \u0111\u1ec1. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch x\u1eed l\u00fd c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.<\/p>\n<h3>Qu\u1ea3n l\u00fd l\u1ef1c \u0111\u1ea9y c\u1ef1c m\u1ea1nh<\/h3>\n<p>Kh\u00f3 kh\u0103n l\u1edbn nh\u1ea5t l\u00e0 gi\u1eef cho c\u00e1c nam ch\u00e2m kh\u00f4ng v\u0103ng ra khi keo d\u00e1n ch\u01b0a \u0111\u00f3ng c\u1ee9ng. Trong <strong>m\u1ea3ng Halbach h\u00ecnh v\u00f2ng<\/strong>, c\u00e1c \u0111o\u1ea1n li\u1ec1n k\u1ec1 th\u01b0\u1eddng \u0111\u1ea9y nhau m\u1ed9t c\u00e1ch d\u1eef d\u1ed9i.<\/p>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng b\u1ed9 jig ch\u1eafc ch\u1eafn:<\/strong> B\u1ea1n kh\u00f4ng th\u1ec3 gi\u1eef ch\u00fang b\u1eb1ng tay. M\u1ed9t jig in 3D ho\u1eb7c gia c\u00f4ng CNC <strong>jig l\u1eafp gh\u00e9p Halbach<\/strong> b\u1eaft bu\u1ed9c \u0111\u1ec3 gi\u1eef c\u1ed1 \u0111\u1ecbnh c\u00e1c \u0111o\u1ea1n.<\/li>\n<li><strong>K\u1eb9p c\u01a1 h\u1ecdc:<\/strong> Ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o keo trong giai \u0111o\u1ea1n thi\u1ebft l\u1eadp ban \u0111\u1ea7u l\u00e0 r\u1ee7i ro. S\u1eed d\u1ee5ng k\u1eb9p kh\u00f4ng t\u1eeb t\u00ednh \u0111\u1ec3 t\u1ea1o \u00e1p l\u1ef1c cho \u0111\u1ebfn khi li\u00ean k\u1ebft tr\u1edf n\u00ean v\u1eefng ch\u1eafc.<\/li>\n<li><strong>Tr\u01b0\u1ee3t, \u0111\u1eebng th\u1ea3 xu\u1ed1ng:<\/strong> \u0110\u1ea9y nam ch\u00e2m v\u00e0o c\u00e1c khe c\u1ee7a ch\u00fang t\u1eeb b\u00ean h\u00f4ng thay v\u00ec th\u1ea3 t\u1eeb tr\u00ean xu\u1ed1ng \u0111\u1ec3 duy tr\u00ec s\u1ef1 ki\u1ec3m so\u00e1t.<\/li>\n<\/ul>\n<h3>S\u1eeda l\u1ed7i h\u01b0\u1edbng<\/h3>\n<p>M\u1ed9t nam ch\u00e2m b\u1ecb l\u1ec7ch duy nh\u1ea5t ph\u00e1 h\u1ecfng hi\u1ec7u \u1ee9ng t\u1eeb tr\u01b0\u1eddng m\u1ed9t ph\u00eda. <strong>l\u1ef1c t\u1eeb hai chi\u1ec1u<\/strong> N\u1ebfu b\u1ea1n d\u00e1n m\u1ed9t \u0111o\u1ea1n v\u1edbi c\u1ef1c t\u1eeb sai <strong>tr\u00ecnh t\u1ef1 \u0111\u1ecbnh h\u01b0\u1edbng Halbach<\/strong>, tr\u01b0\u1eddng s\u1ebd b\u1ecb bi\u1ebfn d\u1ea1ng v\u00e0 hi\u1ec7u qu\u1ea3 s\u1ebd gi\u1ea3m.<\/p>\n<ul>\n<li><strong>\u0110\u00e1nh d\u1ea5u m\u1ecdi m\u1eb7t:<\/strong> Tr\u01b0\u1edbc khi d\u00e1n b\u1ea5t k\u1ef3 keo n\u00e0o, \u0111\u00e1nh d\u1ea5u c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam tr\u00ean m\u1ecdi \u0111o\u1ea1n \u0111\u01a1n l\u1ebb.<\/li>\n<li><strong>Ch\u1ea1y th\u1eed kh\u00f4:<\/strong> L\u1eafp v\u00f2ng m\u00e0 kh\u00f4ng d\u00e1n keo tr\u01b0\u1edbc (n\u1ebfu jig c\u1ee7a b\u1ea1n cho ph\u00e9p) \u0111\u1ec3 x\u00e1c nh\u1eadn m\u1eabu tr\u01b0\u1eddng b\u1eb1ng c\u00e1ch xem t\u1eeb t\u00ednh b\u1eb1ng phim xem t\u1eeb.<\/li>\n<li><strong>G\u1ee1 b\u1ecf:<\/strong> N\u1ebfu x\u1ea3y ra sai s\u00f3t, vi\u1ec7c g\u1ee1 nam ch\u00e2m \u0111\u00e3 d\u00e1n keo r\u1ea5t kh\u00f3. B\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n d\u00f9ng dung m\u00f4i, nh\u01b0ng c\u1ea9n th\u1eadn \u0111\u1ec3 kh\u00f4ng l\u00e0m h\u1ecfng l\u1edbp ph\u1ee7 c\u1ee7a c\u00e1c <strong>X\u00e2y d\u1ef1ng m\u1ed9t<\/strong> \u0111o\u1ea1n xung quanh.<\/li>\n<\/ul>\n<h3>Ng\u0103n ng\u1eeba Ph\u00e1 h\u1ee7y t\u1eeb v\u00e0 h\u1ecfng nhi\u1ec7t<\/h3>\n<p>Nhi\u1ec7t l\u00e0 k\u1ebb th\u00f9 c\u1ee7a nam ch\u00e2m v\u0129nh vi\u1ec5n m\u1ea1nh. Neo t\u1eeb N-grade ti\u00eau chu\u1ea9n s\u1ebd m\u1ea5t s\u1ee9c m\u1ea1nh khi qu\u00e1 n\u00f3ng, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh \u0111\u00f3ng r\u1eafn epoxy ho\u1eb7c n\u1ebfu rotor ho\u00e0n ch\u1ec9nh qu\u00e1 n\u00f3ng.<\/p>\n<ul>\n<li><strong>Theo d\u00f5i nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3ng r\u1eafn:<\/strong> M\u1ed9t s\u1ed1 epoxy c\u00f4ng nghi\u1ec7p sinh nhi\u1ec7t khi ch\u00fang (ph\u1ea3n \u1ee9ng t\u1ecfa nhi\u1ec7t) kh\u1ecfi m\u00f4i tr\u01b0\u1eddng. \u0110\u1ea3m b\u1ea3o nhi\u1ec7t \u0111\u1ed9 \u1edf m\u1ee9c an to\u00e0n cho lo\u1ea1i c\u1ee7a b\u1ea1n <a href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\">nam ch\u00e2m neodymium<\/a>.<\/li>\n<li><strong>Tr\u00e1nh gia c\u00f4ng:<\/strong> Kh\u00f4ng bao gi\u1edd c\u1ed1 g\u1eafng m\u00e0i ho\u1eb7c c\u1eaft nam ch\u00e2m sau khi l\u1eafp r\u00e1p. L\u1ef1c ma s\u00e1t s\u1ebd l\u00e0m t\u1eeb t\u00ednh m\u1ea5t ngay l\u1eadp t\u1ee9c v\u00e0 t\u1ea1o b\u1ee5i d\u1ec5 ch\u00e1y.<\/li>\n<li><strong>L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, ch\u1ecdn nam ch\u00e2m c\u00f3 x\u1ebfp h\u1ea1ng nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n (nh\u01b0 c\u1ea5p \u0111\u1ed9 SH, UH ho\u1eb7c EH) ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ea5p N ti\u00eau chu\u1ea9n.<\/li>\n<\/ul>\n<h3>Gia c\u1ed1 ch\u1ed1ng th\u1ea5t b\u1ea1i c\u1ea5u tr\u00fac<\/h3>\n<p>A <strong>Nam ch\u00e2m h\u00ecnh \u1ed1ng theo m\u1ea3ng Halbach<\/strong> \u0111ang ch\u1ecbu \u00e1p l\u1ef1c n\u1ed9i b\u1ed9 r\u1ea5t l\u1edbn. L\u1ef1c t\u1eeb tr\u01b0\u1eddng li\u00ean t\u1ee5c \u0111\u1ea9y v\u00f2ng ra ngo\u00e0i, c\u1ed1 g\u1eafng l\u00e0m n\u1ed5 tung b\u1ed9 l\u1eafp r\u00e1p.<\/p>\n<ul>\n<li><strong>\u1ed0ng l\u00f3t ngo\u00e0i:<\/strong> Keo d\u00e1n m\u1ed9t m\u00ecnh hi\u1ebfm khi \u0111\u1ee7 cho r\u00f4to v\u1edbi t\u1ed1c \u0111\u1ed9 cao. Cu\u1ed9n v\u00f2ng ho\u00e0n ch\u1ec9nh l\u1ea1i b\u1eb1ng \u1ed1ng l\u00f3t b\u1eb1ng s\u1ee3i carbon ho\u1eb7c \u00e9p v\u00e0o housing b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c titan phi t\u1eeb t\u00ednh.<\/li>\n<li><strong>L\u1ea5p \u0111\u1ea7y khe h\u1edf:<\/strong> \u0110\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 khe h\u1edf kh\u00f4ng kh\u00ed gi\u1eefa c\u00e1c \u0111o\u1ea1n. L\u00e0m \u0111\u1ea7y m\u1ecdi void b\u1eb1ng epoxy tr\u1ed9n v\u1edbi h\u1ea1t si\u00eau nh\u1ecf \u0111\u1ec3 ng\u0103n chuy\u1ec3n \u0111\u1ed9ng d\u01b0\u1edbi t\u1ea3i.<\/li>\n<\/ul>\n<h2>Khi DIY kh\u00f4ng \u0111\u1ee7: Gi\u1ea3i ph\u00e1p t\u00f9y bi\u1ebfn chuy\u00ean nghi\u1ec7p<\/h2>\n<p>Trong khi x\u00e2y d\u1ef1ng m\u1ed9t <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> t\u1ea1i nh\u00e0 l\u00e0 m\u1ed9t c\u00e1ch tuy\u1ec7t v\u1eddi \u0111\u1ec3 hi\u1ec3u l\u00fd thuy\u1ebft from t\u1eeb t\u00ednh, l\u1eafp r\u00e1p th\u1ee7 c\u00f4ng \u0111\u1ea1t \u0111\u1ebfn ng\u01b0\u1ee1ng khi \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 t\u1ed1i quan tr\u1ecdng. \u0110\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, ho\u1eb7c c\u1ea3m bi\u1ebfn c\u00f4ng ngh\u1ec7 cao, c\u00e1ch ti\u1ebfp c\u1eadn \u201cx\u1ea5p x\u1ec9 \u0111\u1ee7\u201d c\u1ee7a m\u1ed9t d\u1ef1 \u00e1n t\u1ea1i garage s\u1ebd kh\u00f4ng mang l\u1ea1i hi\u1ec7u su\u1ea5t ho\u1eb7c an to\u00e0n c\u1ea7n thi\u1ebft.<\/p>\n<h3>H\u1ea1n ch\u1ebf c\u1ee7a C\u00e1c B\u1ed9 Halbach T\u1ef1 L\u00e0m<\/h3>\n<p>L\u1eafp r\u00e1p b\u1eb1ng tay m\u1ed9t <strong>m\u1ea3ng Halbach h\u00ecnh v\u00f2ng<\/strong> g\u00e2y ra nh\u1eefng l\u1ed7i kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi. Ngay c\u1ea3 v\u1edbi m\u1ed9t c\u00e1i khu\u00f4n in 3D, nh\u1eefng bi\u1ebfn \u0111\u1ed5i nh\u1ecf v\u1ec1 k\u00edch th\u01b0\u1edbc nam ch\u00e2m v\u00e0 \u0111\u1ed9 d\u00e0y keo d\u1eabn \u0111\u1ebfn vi\u1ec7c t\u00edch l\u0169y c\u00e1c dung sai. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn rotor m\u1ea5t c\u00e2n b\u1eb1ng ho\u1eb7c tr\u01b0\u1eddng t\u1eeb kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. Th\u00eam v\u00e0o \u0111\u00f3, c\u00e1c lo\u1ea1i epoxy th\u01b0\u01a1ng m\u1ea1i ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 kh\u00f4ng ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c ly t\u00e2m c\u1ef1c \u0111\u1ea1i do \u0111\u1ed9ng c\u01a1 t\u1ed1c \u0111\u1ed9 cao t\u1ea1o ra, bi\u1ebfn d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n th\u00e0nh m\u1ed9t m\u1ed1i nguy hi\u1ec3m cho an to\u00e0n.<\/p>\n<h3>L\u1ee3i \u00edch c\u1ee7a S\u1ea3n xu\u1ea5t Chuy\u00ean nghi\u1ec7p<\/h3>\n<p>L\u00e0 m\u1ed9t <strong>nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0nh Halbach t\u00f9y ch\u1ec9nh<\/strong>, ch\u00fang t\u00f4i v\u1eadn h\u00e0nh b\u1eb1ng thi\u1ebft b\u1ecb c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u01b0\u1ee3t xa kh\u1ea3 n\u0103ng DIY. Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng ti\u00ean ti\u1ebfn \u0111\u1ec3 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c <strong>m\u1eabu t\u1eeb t\u00ednh<\/strong> y\u00eau c\u1ea7u cho hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u. Kh\u00e1c v\u1edbi l\u1eafp r\u00e1p th\u1ee7 c\u00f4ng, c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn l\u1eafp r\u00e1p c\u00e1c ph\u1ea7n ch\u01b0a t\u1eeb h\u00f3a v\u00e0 sau \u0111\u00f3 \u00e1p d\u1ee5ng tr\u01b0\u1eddng, ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c v\u00f9ng nam ch\u00e2m \u0111\u01b0\u1ee3c gia c\u00f4ng ch\u00ednh x\u00e1c <strong>v\u00f2ng Halbach NdFeB<\/strong> c\u00e1c v\u00e0nh gh\u00e9p l\u1ea1i ho\u00e0n to\u00e0n<\/p>\n<p>. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p quy\u1ec1n truy c\u1eadp t\u1edbi c\u00e1c ch\u1ea5t l\u01b0\u1ee3ng v\u01b0\u1ee3t tr\u1ed9i <a href=\"https:\/\/nbaem.com\/vi\/magnets-materials\/\">nam ch\u00e2m v\u00e0 v\u1eadt li\u1ec7u<\/a> m\u00e0 th\u01b0\u1eddng kh\u00f4ng c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng ng\u01b0\u1eddi ti\u00eau d\u00f9ng, nh\u01b0 c\u00e1c lo\u1ea1i ch\u1ecbu nhi\u1ec7t cao thi\u1ebft y\u1ebfu cho c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 ho\u1eb7c h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5.<\/p>\n<p><strong>DIY so v\u1edbi S\u1ea3n xu\u1ea5t Chuy\u00ean nghi\u1ec7p:<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"text-align: left;\">L\u1eafp r\u00e1p DIY<\/th>\n<th style=\"text-align: left;\">S\u1ea3n xu\u1ea5t chuy\u00ean nghi\u1ec7p<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c<\/strong><\/td>\n<td style=\"text-align: left;\">Th\u1ea5p (l\u1ed7i th\u1ee7 c\u00f4ng)<\/td>\n<td style=\"text-align: left;\">Cao ( dung sai \u1edf m\u1ee9c micron)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed3ng nh\u1ea5t c\u1ee7a tr\u01b0\u1eddng<\/strong><\/td>\n<td style=\"text-align: left;\">Kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t<\/td>\n<td style=\"text-align: left;\">S\u00f3ng h\u00ecnh sin g\u1ea7n nh\u01b0 ho\u00e0n h\u1ea3o<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed9 b\u1ec1n k\u1ebft c\u1ea5u<\/strong><\/td>\n<td style=\"text-align: left;\">Ph\u1ee5 thu\u1ed9c v\u00e0o keo ng\u01b0\u1eddi ti\u00eau d\u00f9ng<\/td>\n<td style=\"text-align: left;\">Li\u00ean k\u1ebft v\u00e0 b\u1ecdc c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong><\/td>\n<td style=\"text-align: left;\">Ch\u1ec9 c\u00f3 nguy\u00ean m\u1eabu \u0111\u01a1n<\/td>\n<td style=\"text-align: left;\">S\u1eb5n s\u00e0ng s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Th\u00f4ng s\u1ed1 t\u00f9y ch\u1ec9nh cho Hi\u1ec7u su\u1ea5t Cao<\/h3>\n<p>Khi b\u1ea1n c\u1ea7n m\u1ed9t <strong>v\u00f2ng Halbach neodymium<\/strong> \u0111i xa gi\u1edbi h\u1ea1n, ch\u1ebf t\u1ea1o chuy\u00ean nghi\u1ec7p l\u00e0 con \u0111\u01b0\u1eddng duy nh\u1ea5t. Ch\u00fang t\u00f4i c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf c\u00e1c v\u00f2ng v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb K c\u1ee5 th\u1ec3 \u0111\u1ec3 t\u1ed1i \u01b0u tr\u01b0\u1eddng cho \u1ee9ng d\u1ee5ng \u0111\u1ed9c \u0111\u00e1o c\u1ee7a b\u1ea1n, cho d\u00f9 l\u00e0 t\u1eadp trung l\u01b0u l\u01b0\u1ee3ng v\u00e0o ID cho rotor hay OD cho \u1ed5 \u0111\u1ee1. S\u1ea3n xu\u1ea5t chuy\u00ean nghi\u1ec7p \u0111\u1ea3m b\u1ea3o ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng chu\u1ea9n ISO, \u0111\u1ea3m b\u1ea3o m\u1ecdi v\u00f2ng ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c nh\u01b0 trong datasheet.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 V\u00f2ng Halbach<\/h2>\n<h3>M\u1ee9c \u0111\u1ed9 m\u1ea1nh h\u01a1n c\u1ee7a v\u00f2ng Halbach so v\u1edbi nam ch\u00e2m chu\u1ea9n l\u00e0 bao nhi\u00eau?<\/h3>\n<p>Kho\u1ea3ng c\u00e1ch hi\u1ec7u su\u1ea5t l\u00e0 \u0111\u00e1ng k\u1ec3. M\u1ed9t thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a \u0111\u00fang c\u00e1ch <strong>\u0111i\u1ec3m t\u1eeb magnet v\u00f2ng Halbach<\/strong> th\u01b0\u1eddng mang l\u1ea1i <strong>1,4 \u0111\u1ebfn 2 l\u1ea7n m\u1eadt \u0111\u1ed9 flux cao h\u01a1n<\/strong> \u1edf m\u1eb7t l\u00e0m vi\u1ec7c so v\u1edbi m\u1ed9t v\u00f2ng t\u1eeb \u0111o \u0111\u01b0\u1eddng k\u00ednh ti\u00eau chu\u1ea9n c\u00f3 c\u00f9ng th\u1ec3 t\u00edch. Hi\u1ec7u \u1ee9ng \u201ct\u1ef1 che ch\u1eafn\u201d n\u00e0y t\u1eadp trung tr\u01b0\u1eddng t\u1eeb ho\u00e0n to\u00e0n v\u1ec1 m\u1ed9t ph\u00eda (ho\u1eb7c ph\u00eda trong \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a ID ho\u1eb7c OD), cho ph\u00e9p c\u00e1c k\u1ef9 s\u01b0 gi\u1ea3m t\u1ed5ng tr\u1ecdng l\u01b0\u1ee3ng \u0111\u1ed9ng c\u01a1 ho\u1eb7c c\u1eb7p truy\u1ec1n l\u00ean t\u1edbi 20% trong khi v\u1eabn duy tr\u00ec ho\u1eb7c t\u0103ng m\u00f4-men<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 l\u1eafp r\u00e1p m\u1ea3ng Halbach m\u00e0 kh\u00f4ng c\u1ea7n jig kh\u00f4ng?<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, c\u00e2u tr\u1ea3 l\u1eddi l\u00e0 kh\u00f4ng. L\u1ef1c \u0111\u1ea9y gi\u1eefa c\u00e1c \u0111o\u1ea1n nam ch\u00e2m r\u1ea5t l\u1edbn, \u0111\u1eb7c bi\u1ec7t khi x\u1eed l\u00fd v\u1eadt li\u1ec7u N50 ho\u1eb7c N52 ch\u1ea5t l\u01b0\u1ee3ng cao. N\u1ebfu kh\u00f4ng c\u00f3 jig l\u1eafp r\u00e1p phi t\u1eeb t\u00ednh chuy\u00ean d\u1ee5ng, c\u00e1c \u0111o\u1ea1n s\u1ebd kh\u00f4ng tr\u00e1nh kh\u1ecfi b\u1ecb l\u1eadt ng\u01b0\u1ee3c, d\u1ecbch chuy\u1ec3n ho\u1eb7c v\u1ee1 trong qu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o. Ch\u00ednh x\u00e1c l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t; ch\u1ec9 m\u1ed9t sai l\u1ec7ch nh\u1ecf c\u0169ng l\u00e0m gi\u00e1n \u0111o\u1ea1n vector t\u1eeb quay, l\u00e0m h\u1ecfng hi\u1ec7u qu\u1ea3 c\u1ee7a <a href=\"https:\/\/nbaem.com\/vi\/products\/halbach-array\/\" target=\"_blank\" rel=\"noopener\">M\u1ea3ng Halbach<\/a>. Ch\u00fang t\u00f4i ch\u1ec9 s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 t\u00f9y ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o chu\u1ed7i \u0111\u1ecbnh h\u01b0\u1edbng 90\u00b0 \u0111\u01b0\u1ee3c kh\u00f3a chu\u1ea9n x\u00e1c ho\u00e0n h\u1ea3o.<\/p>\n<h3>H\u00f2n glue t\u1ed1t nh\u1ea5t cho l\u1eafp r\u00e1p nam ch\u00e2m neodymium l\u00e0 g\u00ec?<\/h3>\n<p>C\u00e1c lo\u1ea1i keo ti\u00eau d\u00f9ng ti\u00eau chu\u1ea9n kh\u00f4ng \u0111\u1ee7 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i c\u01a1 h\u1ecdc m\u00e0 m\u1ed9t <strong>Nam ch\u00e2m h\u00ecnh \u1ed1ng theo m\u1ea3ng Halbach<\/strong> v\u1eadt ch\u1ecbu \u0111\u1ef1ng. Ch\u00fang t\u00f4i \u0111\u1ec1 xu\u1ea5t epoxy k\u1ebft c\u1ea5u c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u01b0\u1ee3c \u0111\u1eb7c ch\u1ebf cho g\u1eafn k\u1ebft kim lo\u1ea1i. Nh\u1eefng lo\u1ea1i keo n\u00e0y ph\u1ea3i ch\u1ecbu l\u1ef1c c\u1eaft do repulsion t\u1eeb t\u1eeb v\u00e0 th\u00edch \u1ee9ng v\u1edbi s\u1ef1 ch\u00eanh l\u1ec7ch gi\u00e3n n\u1edf nhi\u1ec7t. \u0110\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, nh\u01b0 trong \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, vi\u1ec7c ch\u1ecdn keo c\u0169ng quan tr\u1ecdng nh\u01b0 ch\u1ecdn c\u1ea5p nam ch\u00e2m ph\u00f9 h\u1ee3p \u0111\u1ec3 ng\u0103n ng\u1eeba h\u1ecfng d\u01b0\u1edbi t\u1ea3i<\/p>\n<div id=\"references\" class=\"min-w-0 scroll-mt-8 overflow-hidden\">\n<div class=\"text-[16px]\"><\/div>\n<div class=\"flex flex-col gap-2 text-sm leading-relaxed\">\n<div class=\"break-words text-[1em] leading-7\"><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Learn c\u00e1ch l\u00e0m v\u00f2ng nam ch\u00e2m Halbach v\u1edbi h\u01b0\u1edbng d\u1eabn DIY t\u1eebng b\u01b0\u1edbc v\u1ec1 l\u1eafp r\u00e1p, \u0111\u1ecbnh h\u01b0\u1edbng nam ch\u00e2m, an to\u00e0n v\u00e0 c\u00e1c t\u00f9y ch\u1ecdn s\u1ea3n xu\u1ea5t t\u00f9y ch\u1ec9nh.<\/p>","protected":false},"author":1,"featured_media":3643,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-3644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-halbach-array"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/How_to_make_a_Halbach_array_ring_magnet_3KxdPd3hY.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3644","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=3644"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3644\/revisions"}],"predecessor-version":[{"id":3661,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3644\/revisions\/3661"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3643"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}