{"id":1367,"date":"2020-06-22T08:40:36","date_gmt":"2020-06-22T08:40:36","guid":{"rendered":"https:\/\/spiralbevelgearbox.xyz\/?p=1367"},"modified":"2020-06-22T08:40:36","modified_gmt":"2020-06-22T08:40:36","slug":"variable-speed-drive-3","status":"publish","type":"post","link":"https:\/\/spiralbevelgearbox.xyz\/vi\/application\/variable-speed-drive-3\/","title":{"rendered":"B\u1ed9 truy\u1ec1n \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i"},"content":{"rendered":"

Bi\u1ebfn t\u1ea7n (VFD) l\u00e0 m\u1ed9t lo\u1ea1i b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 d\u00f9ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p cung c\u1ea5p cho \u0111\u1ed9ng c\u01a1. C\u00e1c t\u00ean g\u1ecdi kh\u00e1c c\u1ee7a VFD bao g\u1ed3m: bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9, bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh gia t\u1ed1c, bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1, bi\u1ebfn t\u1ea7n AC, bi\u1ebfn t\u1ea7n vi m\u00f4 v\u00e0 bi\u1ebfn t\u1ea7n.
T\u1ea7n s\u1ed1 (hay hertz) li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 quay c\u1ee7a \u0111\u1ed9ng c\u01a1 (v\u00f2ng\/ph\u00fat). N\u00f3i c\u00e1ch kh\u00e1c, t\u1ea7n s\u1ed1 c\u00e0ng cao th\u00ec t\u1ed1c \u0111\u1ed9 quay c\u00e0ng nhanh. N\u1ebfu \u1ee9ng d\u1ee5ng th\u1ebb t\u00edn d\u1ee5ng kh\u00f4ng y\u00eau c\u1ea7u \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a, bi\u1ebfn t\u1ea7n (VFD) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3m t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p xu\u1ed1ng nh\u1eb1m \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u nh\u1ea5t \u0111\u1ecbnh v\u1ec1 t\u1ea3i c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n. Khi y\u00eau c\u1ea7u v\u1ec1 t\u1ed1c \u0111\u1ed9 quay c\u1ee7a \u0111\u1ed9ng c\u01a1 thay \u0111\u1ed5i, bi\u1ebfn t\u1ea7n ch\u1ec9 c\u1ea7n t\u0103ng ho\u1eb7c gi\u1ea3m t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 t\u1ed1c \u0111\u1ed9.
Giai \u0111o\u1ea1n \u0111\u1ea7u ti\u00ean c\u1ee7a b\u1ed9 bi\u1ebfn t\u1ea7n AC (VFD) l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i th\u01b0\u1eddng bao g\u1ed3m s\u00e1u \u0111i\u1ed1t, ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 van m\u1ed9t chi\u1ec1u trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc. Ch\u00fang cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n l\u01b0u th\u00f4ng ch\u1ec9 theo m\u1ed9t chi\u1ec1u; chi\u1ec1u \u0111\u01b0\u1ee3c ch\u1ec9 ra b\u1edfi m\u0169i t\u00ean trong k\u00fd hi\u1ec7u \u0111i\u1ed1t. V\u00ed d\u1ee5, b\u1ea5t c\u1ee9 khi n\u00e0o \u0111i\u1ec7n \u00e1p pha A (\u0111i\u1ec7n \u00e1p t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u00e1p su\u1ea5t trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng n\u01b0\u1edbc) d\u01b0\u01a1ng h\u01a1n \u0111i\u1ec7n \u00e1p pha B ho\u1eb7c C, th\u00ec \u0111i\u1ed1t \u0111\u00f3 s\u1ebd m\u1edf ra v\u00e0 cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ea3y qua. Khi \u0111i\u1ec7n \u00e1p pha B d\u01b0\u01a1ng h\u01a1n pha A, th\u00ec \u0111i\u1ed1t pha B s\u1ebd m\u1edf ra v\u00e0 \u0111i\u1ed1t pha A s\u1ebd \u0111\u00f3ng l\u1ea1i. \u0110i\u1ec1u t\u01b0\u01a1ng t\u1ef1 c\u0169ng \u0111\u00fang v\u1edbi 3 \u0111i\u1ed1t \u1edf ph\u1ea7n \u00e2m c\u1ee7a thanh d\u1eabn. Do \u0111\u00f3, ta thu \u0111\u01b0\u1ee3c s\u00e1u \"xung\" d\u00f2ng \u0111i\u1ec7n khi m\u1ed7i \u0111i\u1ed1t m\u1edf v\u00e0 \u0111\u00f3ng. \u0110\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \"VFD s\u00e1u xung\", l\u00e0 c\u1ea5u h\u00ecnh th\u00f4ng th\u01b0\u1eddng cho c\u00e1c b\u1ed9 bi\u1ebfn t\u1ea7n hi\u1ec7n nay.
Gi\u1ea3 s\u1eed r\u1eb1ng b\u1ed9 truy\u1ec1n \u0111\u1ed9ng \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u1edbi ngu\u1ed3n \u0111i\u1ec7n 480V. Gi\u00e1 tr\u1ecb 480V \u0111\u01b0\u1ee3c ghi l\u00e0 \"rms\" hay gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng b\u00ecnh ph\u01b0\u01a1ng trung b\u00ecnh. \"\"\u0110\u1ec9nh \u0111i\u1ec7n \u00e1p tr\u00ean ch\u01b0\u01a1ng tr\u00ecnh 480V l\u00e0 679V. Nh\u01b0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y r\u00f5, bus DC c\u1ee7a bi\u1ebfn t\u1ea7n c\u00f3 \u0111i\u1ec7n \u00e1p DC v\u1edbi g\u1ee3n s\u00f3ng AC. \u0110i\u1ec7n \u00e1p dao \u0111\u1ed9ng trong kho\u1ea3ng t\u1eeb 580V \u0111\u1ebfn 680V.
Ch\u00fang ta c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf g\u1ee3n s\u00f3ng AC tr\u00ean \u0111\u01b0\u1eddng d\u00e2y DC b\u1eb1ng c\u00e1ch th\u00eam m\u1ed9t t\u1ee5 \u0111i\u1ec7n. T\u1ee5 \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t b\u00ecnh ch\u1ee9a ho\u1eb7c b\u1ed9 t\u00edch \u00e1p trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng. T\u1ee5 \u0111i\u1ec7n n\u00e0y h\u1ea5p th\u1ee5 g\u1ee3n s\u00f3ng AC v\u00e0 cung c\u1ea5p \u0111i\u1ec7n \u00e1p DC s\u1ea1ch. G\u1ee3n s\u00f3ng AC tr\u00ean \u0111\u01b0\u1eddng d\u00e2y DC th\u01b0\u1eddng nh\u1ecf h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi 3 Volts. Do \u0111\u00f3, \u0111i\u1ec7n \u00e1p tr\u00ean \u0111\u01b0\u1eddng d\u00e2y DC s\u1ebd tr\u1edf th\u00e0nh \u201ckho\u1ea3ng\u201d 650VDC. \u0110i\u1ec7n \u00e1p th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee9c \u0111i\u1ec7n \u00e1p c\u1ee7a m\u1ea1ch AC c\u1ea5p ngu\u1ed3n cho \u0111\u1ed9ng c\u01a1, m\u1ee9c \u0111\u1ed9 m\u1ea5t c\u00e2n b\u1eb1ng \u0111i\u1ec7n \u00e1p trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, t\u1ea3i \u0111\u1ed9ng c\u01a1, tr\u1edf kh\u00e1ng c\u1ee7a h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea5t k\u1ef3 cu\u1ed9n c\u1ea3m ho\u1eb7c b\u1ed9 l\u1ecdc h\u00e0i n\u00e0o tr\u00ean \u0111\u1ed9ng c\u01a1.
B\u1ed9 chuy\u1ec3n \u0111\u1ed5i c\u1ea7u diode chuy\u1ec3n \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u sang d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u, \u0111\u00f4i khi ch\u1ec9 \u0111\u01b0\u1ee3c g\u1ecdi \u0111\u01a1n gi\u1ea3n l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i. B\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u1ec3n \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u tr\u1edf l\u1ea1i d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u0169ng c\u00f3 th\u1ec3 l\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, nh\u01b0ng \u0111\u1ec3 ph\u00e2n bi\u1ec7t v\u1edbi b\u1ed9 chuy\u1ec3n \u0111\u1ed5i diode, ng\u01b0\u1eddi ta th\u01b0\u1eddng g\u1ecdi n\u00f3 l\u00e0 \"b\u1ed9 ngh\u1ecbch l\u01b0u\". Hi\u1ec7n nay, tr\u00ean th\u1ecb tr\u01b0\u1eddng, vi\u1ec7c g\u1ecdi b\u1ea5t k\u1ef3 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i DC sang AC n\u00e0o l\u00e0 b\u1ed9 ngh\u1ecbch l\u01b0u \u0111\u00e3 tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn.
Khi ta \u0111\u00f3ng m\u1ed9t trong c\u00e1c c\u00f4ng t\u1eafc ph\u00eda tr\u00ean c\u1ee7a b\u1ed9 bi\u1ebfn t\u1ea7n, pha \u0111\u00f3 c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi bus DC d\u01b0\u01a1ng v\u00e0 \u0111i\u1ec7n \u00e1p tr\u00ean pha \u0111\u00f3 tr\u1edf th\u00e0nh d\u01b0\u01a1ng. Khi ta \u0111\u00f3ng m\u1ed9t trong c\u00e1c c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u1edbi c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i, pha \u0111\u00f3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi bus DC \u00e2m v\u00e0 chuy\u1ec3n th\u00e0nh \u00e2m. Nh\u01b0 v\u1eady, ta c\u00f3 th\u1ec3 l\u00e0m cho b\u1ea5t k\u1ef3 pha n\u00e0o tr\u00ean \u0111\u1ed9ng c\u01a1 tr\u1edf th\u00e0nh d\u01b0\u01a1ng ho\u1eb7c \u00e2m t\u00f9y \u00fd v\u00e0 do \u0111\u00f3 s\u1ebd t\u1ea1o ra b\u1ea5t k\u1ef3 t\u1ea7n s\u1ed1 n\u00e0o m\u00e0 ta mu\u1ed1n. V\u00ec v\u1eady, ta c\u00f3 th\u1ec3 l\u00e0m cho b\u1ea5t k\u1ef3 pha n\u00e0o l\u00e0 d\u01b0\u01a1ng, \u00e2m ho\u1eb7c b\u1eb1ng kh\u00f4ng.
N\u1ebfu b\u1ea1n c\u00f3 m\u1ed9t \u1ee9ng d\u1ee5ng th\u1ebb t\u00edn d\u1ee5ng kh\u00f4ng c\u1ea7n ho\u1ea1t \u0111\u1ed9ng h\u1ebft c\u00f4ng su\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 b\u1eb1ng bi\u1ebfn t\u1ea7n (VFD), \u0111\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng l\u1ee3i \u00edch c\u1ee7a VFD. VFD cho ph\u00e9p b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 c\u1ee7a thi\u1ebft b\u1ecb d\u1eabn \u0111\u1ed9ng b\u1eb1ng \u0111\u1ed9ng c\u01a1 sao cho ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u t\u1ea3i. Ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n xoay chi\u1ec1u n\u00e0o kh\u00e1c cho ph\u00e9p b\u1ea1n l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y.
B\u1eb1ng c\u00e1ch v\u1eadn h\u00e0nh \u0111\u1ed9ng c\u01a1 \u1edf gia t\u1ed1c hi\u1ec7u qu\u1ea3 nh\u1ea5t cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n, s\u1ebd gi\u1ea3m thi\u1ec3u l\u1ed7i x\u1ea3y ra, t\u1eeb \u0111\u00f3 t\u0103ng n\u0103ng su\u1ea5t, mang l\u1ea1i doanh thu cao h\u01a1n cho c\u00f4ng ty. Tr\u00ean b\u0103ng t\u1ea3i, b\u1ea1n lo\u1ea1i b\u1ecf \u0111\u01b0\u1ee3c hi\u1ec7n t\u01b0\u1ee3ng gi\u1eadt c\u1ee5c khi kh\u1edfi \u0111\u1ed9ng, cho ph\u00e9p n\u0103ng su\u1ea5t cao.
H\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n chi\u1ebfm h\u01a1n 65% \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 trong c\u00f4ng nghi\u1ec7p hi\u1ec7n nay. T\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 b\u1eb1ng c\u00e1ch l\u1eafp \u0111\u1eb7t ho\u1eb7c n\u00e2ng c\u1ea5p l\u00ean bi\u1ebfn t\u1ea7n (VFD) c\u00f3 th\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 trong nh\u00e0 m\u00e1y c\u1ee7a b\u1ea1n l\u00ean \u0111\u1ebfn 70%. Ngo\u00e0i ra, vi\u1ec7c s\u1eed d\u1ee5ng VFD gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m v\u00e0 gi\u1ea3m chi ph\u00ed s\u1ea3n xu\u1ea5t. K\u1ebft h\u1ee3p c\u00e1c \u01b0u \u0111\u00e3i thu\u1ebf v\u1ec1 hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c kho\u1ea3n gi\u1ea3m gi\u00e1 t\u1eeb c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c, th\u1eddi gian ho\u00e0n v\u1ed1n cho vi\u1ec7c l\u1eafp \u0111\u1eb7t VFD th\u01b0\u1eddng ch\u1ec9 trong v\u00f2ng s\u00e1u th\u00e1ng.<\/p>\n

Ch\u1eafc ch\u1eafn b\u1ea1n \u0111\u00e3 d\u1ef1a v\u00e0o internet \u0111\u1ec3 t\u00ecm th\u00eam th\u00f4ng tin v\u1ec1... B\u1ed9 truy\u1ec1n \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i<\/a> V\u00ec c\u00e1c th\u01b0 vi\u1ec7n kh\u00f4ng c\u00f2n cung c\u1ea5p nhi\u1ec1u th\u00f4ng tin v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y nh\u01b0 tr\u01b0\u1edbc \u0111\u00e2y n\u1eefa.<\/p>","protected":false},"excerpt":{"rendered":"

Bi\u1ebfn t\u1ea7n (VFD) l\u00e0 m\u1ed9t lo\u1ea1i b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p cung c\u1ea5p cho \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n. C\u00e1c t\u00ean g\u1ecdi kh\u00e1c c\u1ee7a VFD bao g\u1ed3m: bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9, bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh gia t\u1ed1c, bi\u1ebfn t\u1ea7n \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1, bi\u1ebfn t\u1ea7n AC, bi\u1ebfn t\u1ea7n vi m\u00f4 v\u00e0 bi\u1ebfn t\u1ea7n. T\u1ea7n s\u1ed1 (ho\u1eb7c hertz) li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":true,"template":"","format":"status","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1367","post","type-post","status-publish","format-status","hentry","category-uncategorized","post_format-post-format-status"],"_links":{"self":[{"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/posts\/1367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/comments?post=1367"}],"version-history":[{"count":1,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/posts\/1367\/revisions"}],"predecessor-version":[{"id":1368,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/posts\/1367\/revisions\/1368"}],"wp:attachment":[{"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/media?parent=1367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/categories?post=1367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spiralbevelgearbox.xyz\/vi\/wp-json\/wp\/v2\/tags?post=1367"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}