{"id":1307,"date":"2024-09-27T07:15:46","date_gmt":"2024-09-27T07:15:46","guid":{"rendered":"https:\/\/nbaem.com\/?p=1307"},"modified":"2025-09-18T03:58:48","modified_gmt":"2025-09-18T03:58:48","slug":"10-uses-of-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/10-uses-of-magnets\/","title":{"rendered":"10 \u1ee8ng d\u1ee5ng c\u1ee7a Nam ch\u00e2m v\u0129nh c\u1eedu"},"content":{"rendered":"

S\u1eed d\u1ee5ng trong \u0110\u1ed9ng c\u01a1 \u0110i\u1ec7n<\/h2>\n

Nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u0111\u1ed9ng c\u01a1 kh\u00f4ng ch\u1ed5i than DC (BLDC), hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i ng\u00e0y nay. Nh\u1eefng nam ch\u00e2m n\u00e0y t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh t\u01b0\u01a1ng t\u00e1c v\u1edbi d\u00e2y qu\u1ea5n c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 t\u1ea1o ra s\u1ef1 quay m\u01b0\u1ee3t m\u00e0, hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ed5i than. Thi\u1ebft k\u1ebf n\u00e0y gi\u1ea3m m\u00e0i m\u00f2n v\u00e0 b\u1ea3o tr\u00ec trong khi n\u00e2ng cao hi\u1ec7u su\u1ea5t.<\/p>\n

Trong c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4, \u0111\u1ed9ng c\u01a1 nam ch\u00e2m v\u0129nh c\u1eedu cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ecdi th\u1ee9 t\u1eeb xe \u0111i\u1ec7n (EV) \u0111\u1ebfn h\u1ec7 th\u1ed1ng l\u00e1i tr\u1ee3 l\u1ef1c \u0111i\u1ec7n, mang l\u1ea1i m\u00f4-men xo\u1eafn cao v\u00e0 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng. Trong m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p, nh\u1eefng nam ch\u00e2m n\u00e0y gi\u00fap v\u1eadn h\u00e0nh b\u0103ng chuy\u1ec1n, b\u01a1m v\u00e0 c\u00e1nh tay robot ch\u00ednh x\u00e1c v\u00e0 \u0111\u00e1ng tin c\u1eady. C\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng nh\u01b0 qu\u1ea1t l\u00e0m m\u00e1t m\u00e1y t\u00ednh, drone v\u00e0 thi\u1ebft b\u1ecb gia d\u1ee5ng c\u0169ng d\u1ef1a v\u00e0o \u0111\u1ed9ng c\u01a1 nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng y\u00ean t\u0129nh, hi\u1ec7u qu\u1ea3.<\/p>\n

M\u00e1y ch\u1ee5p c\u1ed9ng h\u01b0\u1edfng t\u1eeb MRI<\/h2>\n

\"\"<\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a Nam ch\u00e2m V\u0129nh c\u1eedu trong \u0110i\u1ec7n t\u1eed v\u00e0 Thi\u1ebft b\u1ecb C\u00f4ng ngh\u1ec7<\/h2>\n

Nam ch\u00e2m v\u0129nh c\u1eedu r\u1ea5t c\u1ea7n thi\u1ebft trong nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 \u0111\u1ed3 d\u00f9ng h\u00e0ng ng\u00e0y. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 ch\u00ednh trong loa, tai nghe, micro v\u00e0 c\u00e1c c\u1ea3m bi\u1ebfn kh\u00e1c nhau. Trong loa v\u00e0 tai nghe, nh\u1eefng nam ch\u00e2m n\u00e0y t\u01b0\u01a1ng t\u00e1c v\u1edbi t\u00edn hi\u1ec7u \u0111i\u1ec7n \u0111\u1ec3 di chuy\u1ec3n m\u00e0ng loa, t\u1ea1o ra \u00e2m thanh. Nam ch\u00e2m v\u0129nh c\u1eedu m\u1ea1nh, \u0111\u1eb7c bi\u1ec7t l\u00e0 nam ch\u00e2m neodymium, gi\u00fap mang l\u1ea1i \u00e2m thanh r\u00f5 r\u00e0ng, phong ph\u00fa v\u1edbi kh\u1ea3 n\u0103ng ph\u00e1t \u00e2m l\u1edbn h\u01a1n v\u00e0 ph\u1ea3n h\u1ed3i bass t\u1ed1t h\u01a1n.<\/p>\n

Micro c\u0169ng ph\u1ee5 thu\u1ed9c v\u00e0o nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i s\u00f3ng \u00e2m th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n ch\u00ednh x\u00e1c. Trong khi \u0111\u00f3, c\u1ea3m bi\u1ebfn s\u1eed d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu c\u1ea3i thi\u1ec7n \u0111\u1ed9 nh\u1ea1y c\u1ee7a thi\u1ebft b\u1ecb b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n chuy\u1ec3n \u0111\u1ed9ng, v\u1ecb tr\u00ed ho\u1eb7c tr\u01b0\u1eddng t\u1eeb m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 \u0111\u00e1ng tin c\u1eady. \u0110i\u1ec1u n\u00e0y khi\u1ebfn ch\u00fang tr\u1edf n\u00ean quan tr\u1ecdng trong \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ch\u01a1i game v\u00e0 c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng minh kh\u00e1c.<\/p>\n

N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, nam ch\u00e2m v\u0129nh c\u1eedu gi\u00fap c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n, cung c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh cao h\u01a1n v\u00e0 ch\u1ee9c n\u0103ng c\u1ea3m bi\u1ebfn ch\u00ednh x\u00e1c h\u01a1n trong c\u00e1c thi\u1ebft b\u1ecb m\u00e0 ch\u00fang ta d\u1ef1a v\u00e0o h\u00e0ng ng\u00e0y.<\/p>\n

H\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o<\/h2>\n

Nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c m\u00e1y ph\u00e1t \u0111i\u1ec7n turbine gi\u00f3 v\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n th\u1ee7y \u0111i\u1ec7n. Nh\u1eefng nam ch\u00e2m n\u00e0y gi\u00fap chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u1edbi hi\u1ec7u su\u1ea5t cao. S\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u t\u1eeb m\u1ea1nh nh\u01b0 neodymium trong c\u00e1c m\u00e1y ph\u00e1t n\u00e0y t\u0103ng c\u00f4ng su\u1ea5t trong khi gi\u1ea3m k\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y l\u00e0m cho h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o tr\u1edf n\u00ean \u0111\u00e1ng tin c\u1eady v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n, gi\u00fap \u0111\u00e1p \u1ee9ng nhu c\u1ea7u n\u0103ng l\u01b0\u1ee3ng ng\u00e0y c\u00e0ng t\u0103ng. B\u1eb1ng c\u00e1ch n\u00e2ng cao hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng, c\u00f4ng ngh\u1ec7 nam ch\u00e2m v\u0129nh c\u1eedu h\u1ed7 tr\u1ee3 c\u00e1c gi\u1ea3i ph\u00e1p n\u0103ng l\u01b0\u1ee3ng s\u1ea1ch, xanh h\u01a1n tr\u00ean to\u00e0n qu\u1ed1c.<\/p>\n

H\u1ec7 th\u1ed1ng T\u00e1ch t\u1eeb<\/h2>\n

Nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng t\u00e1ch t\u1eeb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong x\u1eed l\u00fd ch\u1ea5t th\u1ea3i c\u00f4ng nghi\u1ec7p v\u00e0 t\u00e1i ch\u1ebf. Nh\u1eefng nam ch\u00e2m n\u00e0y gi\u00fap t\u00e1ch hi\u1ec7u qu\u1ea3 c\u00e1c v\u1eadt li\u1ec7u s\u1eaft t\u1eeb, nh\u01b0 s\u1eaft v\u00e0 th\u00e9p, kh\u1ecfi c\u00e1c v\u1eadt li\u1ec7u phi s\u1eaft. Vi\u1ec7c t\u00e1ch n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft cho c\u00e1c trung t\u00e2m t\u00e1i ch\u1ebf \u0111\u1ec3 thu h\u1ed3i kim lo\u1ea1i c\u00f3 gi\u00e1 tr\u1ecb v\u00e0 gi\u1ea3m thi\u1ec3u ch\u1ea5t th\u1ea3i m\u00f4i tr\u01b0\u1eddng.<\/p>\n

Trong th\u1ef1c t\u1ebf, c\u00e1c h\u1ec7 th\u1ed1ng nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u00ean b\u0103ng chuy\u1ec1n ho\u1eb7c trong c\u00e1c nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01a1i c\u00e1c v\u1eadt li\u1ec7u h\u1ed7n h\u1ee3p \u0111i qua c\u00e1c tr\u01b0\u1eddng t\u1eeb. S\u1ee9c h\u00fat t\u1eeb m\u1ea1nh m\u1ebd c\u1ee7a nam ch\u00e2m b\u1eaft gi\u1eef kim lo\u1ea1i s\u1eaft, cho ph\u00e9p c\u00e1c v\u1eadt li\u1ec7u kh\u00f4ng t\u1eeb t\u00ednh di chuy\u1ec3n ti\u1ebfp. Qu\u00e1 tr\u00ecnh n\u00e0y c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c trong ph\u00e2n lo\u1ea1i v\u00e0 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh t\u00e1i ch\u1ebf.<\/p>\n

C\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p d\u1ef1a v\u00e0o c\u00f4ng ngh\u1ec7 t\u00e1ch t\u1eeb h\u01b0\u1edfng l\u1ee3i t\u1eeb vi\u1ec7c gi\u1ea3m chi ph\u00ed lao \u0111\u1ed9ng v\u00e0 n\u00e2ng cao \u0111\u1ed9 tinh khi\u1ebft c\u1ee7a kim lo\u1ea1i thu h\u1ed3i. Vi\u1ec7c s\u1eed d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu \u1edf \u0111\u00e2y l\u00e0 th\u1ef1c t\u1ebf v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u1ea1i nam ch\u00e2m m\u1ea1nh nh\u01b0 nam ch\u00e2m neodymium ph\u1ed5 bi\u1ebfn t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p v\u1eadt li\u1ec7u t\u1eeb \u1edf Trung Qu\u1ed1c v\u00e0 c\u00e1c n\u01a1i kh\u00e1c.<\/p>\n

\u0110\u1ec3 c\u00f3 th\u00eam th\u00f4ng tin v\u1ec1 c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u t\u1eeb n\u00e2ng cao c\u00f4ng ngh\u1ec7 t\u00e1ch, h\u00e3y xem b\u00e0i vi\u1ebft n\u00e0y v\u1ec1\u00a0nam ch\u00e2m s\u1eed d\u1ee5ng trong n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o<\/a>, li\u00ean k\u1ebft \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p li\u00ean quan.<\/p>\n

Ph\u1ee5 ki\u1ec7n v\u00e0 ch\u1ed1t t\u1eeb t\u00ednh<\/h2>\n

\"Ph\u1ee5<\/p>\n

Nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ph\u1ee5 ki\u1ec7n v\u00e0 ch\u1ed1t t\u1eeb t\u00ednh, gi\u00fap c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y tr\u1edf n\u00ean d\u1ec5 d\u00e0ng v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n. B\u1ea1n s\u1ebd th\u1ea5y ch\u00fang trong c\u1eeda, t\u1ee7 v\u00e0 th\u1eadm ch\u00ed trong c\u00e1c thi\u1ebft b\u1ecb \u0111eo tay th\u00f4ng minh. S\u1ee9c h\u00fat m\u1ea1nh m\u1ebd c\u1ee7a ch\u00fang gi\u00fap ch\u1ed1t gi\u1eef ch\u1eafc ch\u1eafn m\u00e0 kh\u00f4ng c\u1ea7n v\u00edt ho\u1eb7c c\u01a1 ch\u1ebf ph\u1ee9c t\u1ea1p.<\/p>\n

L\u1ee3i \u00edch c\u1ee7a ph\u1ee5 ki\u1ec7n t\u1eeb t\u00ednh:<\/strong><\/p>\n