{"id":4051,"date":"2025-06-24T16:54:32","date_gmt":"2025-06-24T08:54:32","guid":{"rendered":"https:\/\/led.amasly.com\/?page_id=4051"},"modified":"2025-06-24T16:57:39","modified_gmt":"2025-06-24T08:57:39","slug":"what-is-power-factor-led-lighting-power-factor-key-information","status":"publish","type":"page","link":"https:\/\/led.amasly.com\/vi\/knowledge\/led-light-knowledge\/what-is-power-factor-led-lighting-power-factor-key-information\/","title":{"rendered":"H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? Th\u00f4ng tin quan tr\u1ecdng v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED"},"content":{"rendered":"
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\u0110i\u1ec1u g\u00ec l\u00e0 <\/strong>H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/strong>?<\/strong> <\/strong>Th\u00f4ng tin quan tr\u1ecdng v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED<\/strong><\/strong><\/h1>\n\n\n\n

I<\/strong>Gi\u1edbi thi\u1ec7u<\/strong><\/strong><\/h2>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 t\u1ef7 s\u1ed1 gi\u1eefa c\u00f4ng su\u1ea5t h\u1eefu \u00edch (t\u1ee9c l\u00e0 t\u00edch c\u1ee7a \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n) v\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn, v\u00e0 gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3 dao \u0111\u1ed9ng t\u1eeb 0 \u0111\u1ebfn 1. Th\u00f4ng th\u01b0\u1eddng, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED c\u00f3 th\u1ec3 \u0111\u1ea1t 0,95, th\u1eadm ch\u00ed 0,97 \u0111\u1ebfn 0,99, do \u0111\u00f3 n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd nhi\u1ec1u trong ng\u00e0nh nh\u01b0 c\u00e1c th\u00f4ng s\u1ed1 kh\u00e1c (v\u00ed d\u1ee5: hi\u1ec7u su\u1ea5t ph\u00e1t s\u00e1ng, c\u00f4ng su\u1ea5t, \u1ed1ng k\u00ednh, v.v.).<\/p>\n\n\n\n

Tuy nhi\u00ean, tr\u00ean th\u1ecb tr\u01b0\u1eddng v\u1eabn c\u00f2n m\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u00e8n truy\u1ec1n th\u1ed1ng c\u0169ng nh\u01b0 m\u1ed9t s\u1ed1 \u0111\u00e8n LED c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y g\u00e2y ra t\u1ea3i d\u00f2ng \u0111i\u1ec7n l\u1edbn h\u01a1n tr\u00ean l\u01b0\u1edbi \u0111i\u1ec7n, \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eed d\u1ee5ng d\u00e2y \u0111\u1ed3ng d\u00e0y h\u01a1n \u0111\u1ec3 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 t\u1ea3i v\u00e0 s\u1ee5t \u00e1p tr\u00ean \u0111\u01b0\u1eddng d\u00e2y, d\u1eabn \u0111\u1ebfn chi ph\u00ed x\u00e2y d\u1ef1ng h\u1ea1 t\u1ea7ng \u0111i\u1ec7n l\u1ef1c cao h\u01a1n. M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 qu\u1ed1c gia v\u00e0 khu v\u1ef1c \u00e1p d\u1ee5ng ph\u00ed b\u1ed5 sung cho c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, ch\u00fang t\u00f4i cho r\u1eb1ng vi\u1ec7c c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n l\u00e0 c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

Tr\u01b0\u1edbc ti\u00ean, ch\u00fang ta c\u1ea7n hi\u1ec3u r\u00f5 v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3. Ch\u00fang ta c\u0169ng c\u1ea7n bi\u1ebft trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0o \u0111\u00e8n LED ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n v\u1ec1 m\u1eb7t h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t, v\u00ec \u0111\u00e8n LED kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cao.<\/p>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 g\u00ec?<\/strong><\/strong><\/h2>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 t\u1ef7 s\u1ed1 gi\u1eefa c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng (t\u1ee9c l\u00e0 t\u00edch c\u1ee7a \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n) v\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn trong m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u. \u0110\u00e2y l\u00e0 th\u00f4ng s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111o l\u01b0\u1eddng hi\u1ec7u su\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. C\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng l\u00e0 c\u00f4ng su\u1ea5t trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c, trong khi c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn l\u00e0 t\u1ed5ng c\u00f4ng su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng, bao g\u1ed3m c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng (c\u00f4ng su\u1ea5t do s\u1ef1 ch\u00eanh l\u1ec7ch pha gi\u1eefa d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p g\u00e2y ra, th\u01b0\u1eddng kh\u00f4ng th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c h\u1eefu \u00edch).<\/p>\n\n\n\n

V\u1edbi c\u00f4ng th\u1ee9c h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t = c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng \/ c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn), ch\u00fang ta bi\u1ebft r\u1eb1ng gi\u00e1 tr\u1ecb c\u1ee7a h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t n\u1eb1m trong kho\u1ea3ng t\u1eeb 0 \u0111\u1ebfn 1, bao g\u1ed3m c\u1ea3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi t\u1ea3i thu\u1ea7n tr\u1edf kh\u00e1ng, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t b\u1eb1ng 1, c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n c\u00f9ng pha. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 to\u00e0n b\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng h\u1eefu \u00edch v\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 l\u00e3ng ph\u00ed. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi t\u1ea3i c\u1ea3m \u1ee9ng (v\u00ed d\u1ee5: \u0111\u1ed9ng c\u01a1, bi\u1ebfn \u00e1p, v.v.) v\u00e0 t\u1ea3i dung kh\u00e1ng (v\u00ed d\u1ee5: t\u1ee5 \u0111i\u1ec7n, v.v.), d\u00f2ng \u0111i\u1ec7n tr\u1ec5 ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p, d\u1eabn \u0111\u1ebfn m\u1ed9t ph\u1ea7n c\u00f4ng su\u1ea5t kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t s\u1ebd nh\u1ecf h\u01a1n 1. H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p c\u00f3 ngh\u0129a l\u00e0 c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng trong m\u1ea1ch, \u0111i\u1ec1u n\u00e0y s\u1ebd l\u00e0m t\u0103ng t\u1ed5n th\u1ea5t ngu\u1ed3n \u0111i\u1ec7n tr\u00ean \u0111\u01b0\u1eddng d\u00e2y v\u00e0 gi\u1ea3m hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

Do \u0111\u00f3, vi\u1ec7c c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t gi\u00fap gi\u1ea3m ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n, n\u00e2ng cao hi\u1ec7u su\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cung c\u1ea5p \u0111i\u1ec7n. Tr\u00ean th\u1ef1c t\u1ebf, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n th\u00f4ng qua b\u00f9 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, t\u1ed1i \u01b0u h\u00f3a ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p kh\u00e1c.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED \u2013 c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng<\/p>\n\n\n\n

T\u1ea1i sao ch\u00fang ta quan t\u00e2m \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t?<\/strong><\/strong><\/h2>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u00f3 vai tr\u00f2 v\u00f4 c\u00f9ng quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Theo quan \u0111i\u1ec3m c\u1ee7a ch\u00fang t\u00f4i, t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 ch\u1ee7 y\u1ebfu th\u1ec3 hi\u1ec7n qua c\u00e1c kh\u00eda c\u1ea1nh sau:<\/p>\n\n\n\n

1. T\u0103ng c\u01b0\u1eddng s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng:<\/strong><\/strong><\/h3>\n\n\n\n

V\u1edbi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ch\u01b0a \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh (t\u1ee9c l\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t qu\u00e1 th\u1ea5p), h\u1ec7 th\u1ed1ng \u0111i\u1ec7n s\u1ebd ch\u1ecbu t\u1ed5n th\u1ea5t c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng l\u1edbn. Lo\u1ea1i c\u00f4ng su\u1ea5t v\u00f4 \u00edch n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i tr\u1ef1c ti\u1ebfp th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc ho\u1eb7c nhi\u1ec7t khi l\u01b0u th\u00f4ng trong m\u1ea1ch, nh\u01b0ng n\u00f3 t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n d\u01b0 th\u1eeba trong thi\u1ebft b\u1ecb \u0111i\u1ec7n. D\u00f2ng \u0111i\u1ec7n d\u01b0 th\u1eeba n\u00e0y l\u00e0m n\u00f3ng c\u00e1c \u0111i\u1ec7n tr\u1edf b\u00ean trong thi\u1ebft b\u1ecb, t\u1eeb \u0111\u00f3 l\u00e0m t\u0103ng ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a thi\u1ebft b\u1ecb. Ng\u01b0\u1ee3c l\u1ea1i, c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t s\u1ebd gi\u1ea3m t\u1ed5n th\u1ea5t c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng v\u00e0 do \u0111\u00f3 t\u0103ng hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng.<\/p>\n\n\n\n

2. Gi\u1ea3m t\u1ea3i cho l\u01b0\u1edbi \u0111i\u1ec7n:<\/strong><\/strong><\/h3>\n\n\n\n

C\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED gi\u00fap gi\u1ea3m c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng trong l\u01b0\u1edbi \u0111i\u1ec7n, t\u1eeb \u0111\u00f3 gi\u1ea3m t\u1ea3i cho l\u01b0\u1edbi \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 gi\u00fap tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 qu\u00e1 t\u1ea3i v\u00e0 s\u1ef1 c\u1ed1 trong l\u01b0\u1edbi \u0111i\u1ec7n. Ng\u01b0\u1ee3c l\u1ea1i, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c trong l\u01b0\u1edbi \u0111i\u1ec7n, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/p>\n\n\n\n

3. \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb:<\/strong><\/strong><\/h3>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cao gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 gi\u1ea3m l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng. Khi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t qu\u00e1 th\u1ea5p, m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00f4ng su\u1ea5t v\u00f4 \u00edch \u0111\u01b0\u1ee3c sinh ra trong m\u1ea1ch, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t nghi\u00eam tr\u1ecdng c\u1ee7a thi\u1ebft b\u1ecb \u0111i\u1ec7n. C\u1ea3 thi\u1ebft b\u1ecb l\u01b0\u1edbi \u0111i\u1ec7n v\u00e0 thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111i\u1ec7n \u0111\u1ec1u kh\u00f4ng th\u00edch m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao. Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao l\u00e0m gia t\u0103ng qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a c\u1ee7a c\u00e1c linh ki\u1ec7n, d\u1eabn \u0111\u1ebfn suy gi\u1ea3m hi\u1ec7u su\u1ea5t ho\u1eb7c th\u1eadm ch\u00ed h\u01b0 h\u1ecfng. N\u00f3i c\u00e1ch kh\u00e1c, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p kh\u00f4ng ch\u1ec9 g\u00e2y l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng m\u00e0 c\u00f2n g\u00e2y h\u01b0 h\u1ecfng cho thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p do c\u00e1c t\u1ea3i kh\u00e1c nhau<\/strong><\/strong><\/h2>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p ch\u1ee7 y\u1ebfu do vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n. Thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh t\u1ea3i c\u1ea3m \u1ee9ng v\u00e0 t\u1ea3i t\u1ee5 \u0111i\u1ec7n t\u00f9y thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n. Thi\u1ebft b\u1ecb c\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng l\u00e0 t\u1ea3i c\u1ea3m \u1ee9ng, trong khi thi\u1ebft b\u1ecb c\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ea7n t\u1ee5 \u0111i\u1ec7n l\u00e0 t\u1ea3i t\u1ee5 \u0111i\u1ec7n.<\/p>\n\n\n\n

T\u1ea3i thu\u1ea7n tr\u1edf kh\u00e1ng<\/strong><\/strong><\/h3>\n\n\n\n

Ngo\u00e0i c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n, c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb, \u0111\u1ed3 gia d\u1ee5ng v\u00e0 \u0111\u00e8n c\u00f3 t\u00ednh ch\u1ea5t thu\u1ea7n tr\u1edf kh\u00e1ng (t\u1ee9c l\u00e0 t\u1ea3i ohmic thu\u1ea7n t\u00fay). \u0110i\u1ec1u n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c t\u1ea3i m\u00e0 m\u1ea1ch ch\u1ec9 ch\u1ee9a c\u00e1c th\u00e0nh ph\u1ea7n tr\u1edf kh\u00e1ng. Khi \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, m\u1ea1ch ch\u1ec9 t\u1ea1o ra n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t v\u00e0 \u00e1nh s\u00e1ng v\u00e0 kh\u00f4ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh c\u00e1c d\u1ea1ng n\u0103ng l\u01b0\u1ee3ng kh\u00e1c. Trong m\u1ed9t t\u1ea3i thu\u1ea7n tr\u1edf kh\u00e1ng, d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p thay \u0111\u1ed5i \u0111\u1ed3ng b\u1ed9, t\u1ee9c l\u00e0 ch\u00fang c\u00f9ng pha. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch pha gi\u1eefa d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p, do \u0111\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t b\u1eb1ng 1.<\/p>\n\n\n\n

M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh c\u1ee7a t\u1ea3i thu\u1ea7n tr\u1edf kh\u00e1ng l\u00e0 b\u00f3ng \u0111\u00e8n s\u1ee3i \u0111\u1ed1t. Khi b\u00f3ng \u0111\u00e8n s\u1ee3i \u0111\u1ed1t \u0111\u01b0\u1ee3c b\u1eadt s\u00e1ng, n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh nhi\u1ec7t v\u00e0 \u00e1nh s\u00e1ng, trong \u0111\u00f3 nhi\u1ec7t \u0111\u01b0\u1ee3c sinh ra do d\u00f2ng \u0111i\u1ec7n \u0111i qua d\u00e2y tr\u1edf kh\u00e1ng. V\u00ec b\u00f3ng \u0111\u00e8n s\u1ee3i \u0111\u1ed1t l\u00e0 t\u1ea3i thu\u1ea7n tr\u1edf kh\u00e1ng, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a ch\u00fang g\u1ea7n b\u1eb1ng 1, c\u00f3 ngh\u0129a l\u00e0 b\u00f3ng \u0111\u00e8n s\u1ee3i \u0111\u1ed1t c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh \u00e1nh s\u00e1ng\/nhi\u1ec7t m\u00e0 kh\u00f4ng sinh ra nhi\u1ec1u c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng. T\u1ea5t nhi\u00ean, \u0111i\u1ec1u n\u00e0y kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 \u0111\u00e8n s\u1ee3i \u0111\u1ed1t c\u00f3 hi\u1ec7u su\u1ea5t \u00e1nh s\u00e1ng cao nh\u1ea5t.<\/p>\n\n\n\n

T\u1ea3i c\u1ea3m \u1ee9ng<\/strong><\/strong><\/h3>\n\n\n\n

T\u1ea3i c\u1ea3m \u1ee9ng l\u00e0 c\u00e1c t\u1ea3i ch\u1ee9a nhi\u1ec1u th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng trong m\u1ea1ch v\u00e0 l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y ra h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p trong thi\u1ebft b\u1ecb. C\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng bao g\u1ed3m \u0111\u1ed9ng c\u01a1, bi\u1ebfn \u00e1p, cu\u1ed9n c\u1ea3m, v.v., t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng, khi\u1ebfn d\u00f2ng \u0111i\u1ec7n ch\u1eadm h\u01a1n so v\u1edbi \u0111i\u1ec7n \u00e1p. S\u1ef1 ch\u1eadm tr\u1ec5 n\u00e0y g\u00e2y ra s\u1ef1 ch\u00eanh l\u1ec7ch pha gi\u1eefa d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p, l\u00e0m gi\u1ea3m h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t. M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh c\u1ee7a t\u1ea3i c\u1ea3m \u1ee9ng l\u00e0 \u0111\u00e8n HID, c\u00f3 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n t\u1eeb v\u1ed1n d\u0129 l\u00e0 c\u1ea3m \u1ee9ng, d\u1eabn \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u01b0\u1eddng kho\u1ea3ng 0,7 ho\u1eb7c th\u1eadm ch\u00ed d\u01b0\u1edbi 0,5. \u0110\u00e8n LED c\u0169ng thu\u1ed9c lo\u1ea1i n\u00e0y, m\u1eb7c d\u00f9 \u0111\u00e8n LED c\u00f3 th\u1ec3 c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00ean \u0111\u1ebfn 0,97.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

T\u1ea3i c\u1ea3m \u1ee9ng v\u00e0 t\u1ea3i \u0111i\u1ec7n dung<\/p>\n\n\n\n

T\u1ea3i \u0111i\u1ec7n dung<\/strong><\/strong><\/h3>\n\n\n\n

T\u1ea3i \u0111i\u1ec7n dung l\u00e0 c\u00e1c t\u1ea3i c\u00f3 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n dung trong m\u1ea1ch. Kh\u00e1c v\u1edbi t\u1ea3i c\u1ea3m \u1ee9ng, t\u1ea3i \u0111i\u1ec7n dung (nh\u01b0 t\u1ee5 \u0111i\u1ec7n) khi\u1ebfn d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t. Tuy nhi\u00ean, n\u1ebfu \u0111i\u1ec7n tr\u1edf \u0111i\u1ec7n dung qu\u00e1 l\u1edbn, \u0111\u1ebfn m\u1ee9c l\u1edbn h\u01a1n \u0111i\u1ec7n tr\u1edf c\u1ea3m \u1ee9ng, th\u00ec d\u00f2ng \u0111i\u1ec7n s\u1ebd v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p v\u1edbi g\u00f3c pha l\u1edbn, d\u1eabn \u0111\u1ebfn gi\u1ea3m h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t. Th\u01b0\u1eddng th\u00ec t\u1ee5 \u0111i\u1ec7n \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED \u0111\u1ec3 b\u00f9 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng v\u00e0 c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED.<\/p>\n\n\n\n

C\u01a1 b\u1ea3n v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/strong><\/strong><\/h2>\n\n\n\n

Trong hai ph\u1ea7n tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u r\u1eb1ng s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng v\u00e0 t\u1ee5 \u0111i\u1ec7n trong thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u1ea3m thi\u1ec3u h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb, v\u1eady nh\u1eefng l\u00fd do c\u1ee5 th\u1ec3 l\u00e0 g\u00ec? D\u01b0\u1edbi \u0111\u00e2y, ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n m\u1ed9t c\u00e1ch t\u1ed5ng qu\u00e1t h\u01a1n.<\/p>\n\n\n\n

Khi c\u00f3 c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng (t\u1ee9c l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb, nh\u01b0 \u0111\u1ed9ng c\u01a1, bi\u1ebfn \u00e1p v\u00e0 cu\u1ed9n c\u1ea3m) trong m\u1ed9t thi\u1ebft b\u1ecb, d\u00f2ng \u0111i\u1ec7n \u0111i qua c\u00e1c thi\u1ebft b\u1ecb n\u00e0y t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb \u0111\u1ec3 l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng. N\u1ebfu ch\u00fang ta h\u00ecnh dung tr\u01b0\u1eddng t\u1eeb nh\u01b0 m\u1ed9t c\u00e1i x\u00f4 v\u00e0 d\u00f2ng \u0111i\u1ec7n nh\u01b0 n\u01b0\u1edbc, khi ch\u00fang ta m\u1edf v\u00f2i n\u01b0\u1edbc, n\u01b0\u1edbc b\u1eaft \u0111\u1ea7u ch\u1ea3y v\u00e0o x\u00f4, nh\u01b0ng x\u00f4 kh\u00f4ng \u0111\u1ea7y ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n

\u0110i\u1ec1u n\u00e0y l\u00e0 do n\u01b0\u1edbc c\u1ea7n th\u1eddi gian \u0111\u1ec3 ch\u1ea3y v\u00e0 \u0111\u1ed5 \u0111\u1ea7y m\u1ed9t x\u00f4. T\u01b0\u01a1ng t\u1ef1, khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ed9t t\u1ea3i c\u1ea3m \u1ee9ng, n\u00f3 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb b\u00ean trong t\u1ea3i, nh\u01b0ng tr\u01b0\u1eddng n\u00e0y c\u1ea7n th\u1eddi gian \u0111\u1ec3 h\u00ecnh th\u00e0nh. D\u00f2ng \u0111i\u1ec7n do vi\u1ec7c h\u00ecnh th\u00e0nh tr\u01b0\u1eddng t\u1eeb n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cd\u00f2ng \u0111i\u1ec7n c\u1ea3m \u1ee9ng ph\u1ea3n \u1ee9ng\u201d.<\/p>\n\n\n\n

D\u00f2ng \u0111i\u1ec7n n\u00e0y th\u1ef1c t\u1ebf kh\u00f4ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh n\u0103ng l\u01b0\u1ee3ng h\u1eefu \u00edch cho t\u1ea3i, m\u00e0 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong tr\u01b0\u1eddng t\u1eeb. C\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch pha gi\u1eefa d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p, t\u1ee9c l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u00e3 b\u1eaft \u0111\u1ea7u thay \u0111\u1ed5i, nh\u01b0ng d\u00f2ng \u0111i\u1ec7n ch\u01b0a \u0111\u1ea1t \u0111\u1ebfn \u0111\u1ed9 l\u1edbn c\u1ee7a s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p.<\/p>\n\n\n\n

Trong c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng, c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y (v\u00ed d\u1ee5: \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n) c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u0103ng ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng tr\u00ean l\u01b0\u1edbi \u0111i\u1ec7n, m\u1eb7c d\u00f9 ch\u00ednh \u0111\u1ed9ng c\u01a1 kh\u00f4ng ti\u00eau th\u1ee5 qu\u00e1 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y l\u00e0 do c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng ngo\u00e0i c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng. C\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c, m\u00e0 \u0111\u1ec3 duy tr\u00ec tr\u01b0\u1eddng t\u1eeb b\u00ean trong thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

Do s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng, d\u00f2ng \u0111i\u1ec7n l\u01b0u th\u00f4ng trong h\u1ec7 th\u1ed1ng, khi\u1ebfn t\u1ed5ng n\u0103ng l\u01b0\u1ee3ng (c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn) trong h\u1ec7 th\u1ed1ng t\u0103ng l\u00ean. V\u00ec c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, l\u01b0\u1edbi \u0111i\u1ec7n c\u1ea7n cung c\u1ea5p th\u00eam d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n t\u0103ng l\u00ean, m\u1eb7c d\u00f9 ch\u00ednh \u0111\u1ed9ng c\u01a1 kh\u00f4ng ti\u00eau th\u1ee5 qu\u00e1 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng.<\/p>\n\n\n\n

Do \u0111\u00f3, t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t khi thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u00e1c t\u1ea3i c\u1ea3m \u1ee9ng \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t thi\u1ebft b\u1ecb v\u00e0 gi\u1ea3m ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n.<\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t trong h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED<\/strong><\/strong><\/h2>\n\n\n\n

Trong hai ph\u1ea7n tr\u01b0\u1edbc, ch\u00fang t\u00f4i \u0111\u00e3 m\u00f4 t\u1ea3 kh\u00e1i ni\u1ec7m v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t, t\u1ea1i sao n\u00f3 quan tr\u1ecdng v\u00e0 c\u00e1ch s\u1ef1 ch\u00eanh l\u1ec7ch h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u01b0\u1edbi \u0111i\u1ec7n. Trong ph\u1ea7n n\u00e0y, ch\u00fang t\u00f4i gi\u1ea3i th\u00edch c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p h\u01a1n<\/strong><\/strong><\/h3>\n\n\n\n

L\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a \u0111\u00e8n chi\u1ebfu s\u00e1ng, b\u1ed9 ngu\u1ed3n LED c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED. \u0110i\u1ec1u n\u00e0y l\u00e0 do b\u1ed9 ngu\u1ed3n ch\u1ee9a nhi\u1ec1u th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng h\u01a1n so v\u1edbi b\u1ea5t k\u1ef3 ph\u1ea7n n\u00e0o kh\u00e1c c\u1ee7a \u0111\u00e8n. Tuy nhi\u00ean, c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t b\u1ed9 ngu\u1ed3n kh\u00e1c nhau c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn v\u1ec1 hi\u1ec7u su\u1ea5t h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t.<\/p>\n\n\n\n

V\u00ed d\u1ee5, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n Infinity EUM series c\u00f3 th\u1ec3 \u0111\u1ea1t 0.97 ho\u1eb7c th\u1eadm ch\u00ed cao h\u01a1n, trong khi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n MOSO MXG series ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u1ea1t 0.95. C\u00e1c d\u00f2ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED kh\u00e1c nhau t\u1eeb c\u00f9ng m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t c\u0169ng c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch l\u1edbn v\u1ec1 hi\u1ec7u su\u1ea5t h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t. V\u00ed d\u1ee5, b\u1ed9 ngu\u1ed3n D4i t\u1eeb Igor EBS-080S105BT2 c\u00f3 th\u1ec3 \u0111\u1ea1t h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (PF) 0.98.<\/p>\n\n\n\n

Ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh kh\u00f4ng \u0111\u00fang c\u00e1ch<\/strong><\/strong><\/h3>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a c\u00f9ng m\u1ed9t ngu\u1ed3n \u0111i\u1ec7n thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u h\u00ecnh c\u1ee7a thi\u1ebft b\u1ecb chi\u1ebfu s\u00e1ng. \u1ede \u0111\u00e2y, c\u1ea5u h\u00ecnh \u0111\u00e8n ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch gi\u1eefa t\u1ea3i \u0111\u00e8n v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED. T\u1eeb b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y, ch\u00fang ta c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng c\u00e0ng nh\u1ecf t\u1ea3i \u0111\u00e8n, gi\u00e1 tr\u1ecb PF c\u00e0ng x\u1ea5u. L\u1ea5y v\u00ed d\u1ee5 EUM-075S105DG, khi t\u1ea3i \u0111\u00e8n l\u00e0 72W (t\u1ed5ng c\u00f4ng su\u1ea5t \u0111\u00e8n l\u00e0 80W), PF c\u00f3 th\u1ec3 \u0111\u1ea1t 0.97. N\u1ebfu t\u1ea3i c\u1ee7a \u0111\u00e8n gi\u1ea3m xu\u1ed1ng 60W, PF s\u1ebd gi\u1ea3m xu\u1ed1ng 0.96, v\u00e0 n\u1ebfu ti\u1ebfp t\u1ee5c gi\u1ea3m xu\u1ed1ng 50W, PF s\u1ebd gi\u1ea3m xu\u1ed1ng 0.95 ho\u1eb7c th\u1eadm ch\u00ed th\u1ea5p h\u01a1n. L\u00fac n\u00e0y, vi\u1ec7c \u0111\u00fang \u0111\u1eafn l\u00e0 s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n EUM-050 \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n m\u00f4-\u0111un LED t\u01b0\u01a1ng \u1ee9ng nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb PF t\u1ed1t h\u01a1n.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED<\/p>\n\n\n\n

S\u1eed d\u1ee5ng ch\u1ee9c n\u0103ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng<\/strong><\/strong><\/h3>\n\n\n\n

Ch\u1ee9c n\u0103ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng trong \u0111\u00e8n LED \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. M\u1eb7c d\u00f9 vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, ch\u00fang ta c\u0169ng c\u1ea7n l\u01b0u \u00fd \u0111\u1ebfn t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (PF). Trong h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng \u0111\u01b0\u1eddng ph\u1ed1, \u0111\u00e8n LED \u0111\u01b0\u1eddng ph\u1ed1 s\u1ebd gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u t\u00ecnh tr\u1ea1ng chi\u1ebfu s\u00e1ng qu\u00e1 m\u1ee9c khi l\u01b0u l\u01b0\u1ee3ng giao th\u00f4ng gi\u1ea3m sau n\u1eeda \u0111\u00eam. M\u1ed9t v\u00ed d\u1ee5 kh\u00e1c l\u00e0 trong h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng kho b\u00e3i, \u0111\u00e8n LED c\u00f4ng nghi\u1ec7p \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t \u0111\u1ea7u ra d\u1ef1a tr\u00ean t\u00ecnh tr\u1ea1ng s\u1eed d\u1ee5ng kh\u00f4ng gian (c\u00f3 ng\u01b0\u1eddi ho\u1eb7c kh\u00f4ng c\u00f3 ng\u01b0\u1eddi) \u0111\u1ec3 gi\u1ea3m thi\u1ec3u chi\u1ebfu s\u00e1ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

Th\u00f4ng th\u01b0\u1eddng, khi nhu c\u1ea7u chi\u1ebfu s\u00e1ng th\u1ea5p, c\u00e1c thi\u1ebft b\u1ecb LED s\u1ebd gi\u1ea3m c\u00f4ng su\u1ea5t b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED \u0111\u1ec3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, t\u1ee9c l\u00e0 gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED. T\u1eeb \u0111i\u1ec3m th\u1ee9 hai, ch\u00fang ta c\u00f3 th\u1ec3 hi\u1ec3u r\u1eb1ng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED c\u00f3 th\u1ec3 b\u1ecb gi\u1ea3m. \u0110\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb r\u1eb1ng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t kh\u00f4ng n\u00ean v\u01b0\u1ee3t qu\u00e1 50%. N\u1ebfu vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 50%, c\u1ea7n ph\u1ea3i c\u00e2n b\u1eb1ng gi\u1eefa vi\u1ec7c ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u00e1 tr\u1ecb h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t.<\/p>\n\n\n\n

T\u00f3m t\u1eaft<\/strong><\/h2>\n\n\n\n

H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng trong thi\u1ebft b\u1ecb \u0111i\u1ec7n, n\u00f3 l\u00e0 ch\u1ec9 s\u1ed1 so s\u00e1nh gi\u1eefa c\u00f4ng su\u1ea5t th\u1ef1c, c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn v\u00e0 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng trong thi\u1ebft b\u1ecb. C\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n v\u1ec1 m\u1eb7t h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t nh\u1edd s\u1eed d\u1ee5ng b\u1ed9 ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t (PFC) t\u00edch h\u1ee3p b\u00ean trong.<\/p>\n\n\n\n

C\u00e1c nh\u00e0 cung c\u1ea5p b\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1c nhau trong l\u0129nh v\u1ef1c n\u00e0y v\u00e0 c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e8n LED \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb n\u00ean t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 h\u1ecd. \u0110\u1ed3ng th\u1eddi, ch\u00fang ta n\u00ean c\u1ed1 g\u1eafng tr\u00e1nh t\u00ecnh tr\u1ea1ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p do c\u1ea5u h\u00ecnh \u0111\u00e8n kh\u00f4ng h\u1ee3p l\u00fd (t\u1ea3i qu\u00e1 th\u1ea5p).<\/p>\n\n\n\n

Ngo\u00e0i ra, gi\u00e1 tr\u1ecb h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n LED d\u01b0\u1edbi t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 v\u00e0 h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch \u0111\u00e1ng k\u1ec3. Tuy nhi\u00ean, ch\u00fang t\u00f4i cho r\u1eb1ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n c\u1ee7a \u0111\u00e8n LED kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 s\u00e1ng so v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o ti\u00eau th\u1ee5.<\/p>\n\n\n\n

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S\u1ea3n ph\u1ea9m li\u00ean quan<\/h2>\n\n\n\n
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\u0110\u00e8n LED ch\u1ed1ng ch\u00e1y n\u1ed5<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n LED ch\u1ed1ng n\u01b0\u1edbc, ch\u1ed1ng b\u1ee5i v\u00e0 ch\u1ed1ng va \u0111\u1eadp<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n chi\u1ebfu s\u00e1ng ch\u1ed1ng ch\u00e1y n\u1ed5 cho tr\u1ea1m x\u0103ng<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n\n\n\n
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\u0110\u00e8n LED chi\u1ebfu s\u00e1ng r\u1ed9ng<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n \u1ed1ng LED ch\u1ed1ng n\u01b0\u1edbc, ch\u1ed1ng b\u1ee5i v\u00e0 ch\u1ed1ng va \u0111\u1eadp<\/a><\/h4>\n<\/div>\n\n\n\n
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\u0110\u00e8n \u0111\u01b0\u1eddng LED<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n\n\n\n
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What is Power Factor? LED Lighting Power Factor Key Information Introductory Power factor is the ratio of useful power (i.e., the product of voltage and current) to apparent power, and its value ranges from 0 to 1. Typically, the power factor of LED lighting can reach 0.95, or even 0.97 to 0.99, so it does not […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2984,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"enabled","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-4051","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Joe","author_link":"https:\/\/led.amasly.com\/vi\/author\/jacklin\/"},"uagb_comment_info":0,"uagb_excerpt":"What is Power Factor? LED Lighting Power Factor Key Information Introductory Power factor is the ratio of useful power (i.e., the product of voltage and current) to apparent power, and its value ranges from 0 to 1. Typically, the power factor of LED lighting can reach 0.95, or even 0.97 to 0.99, so it does not…","_links":{"self":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/pages\/4051","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/comments?post=4051"}],"version-history":[{"count":1,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/pages\/4051\/revisions"}],"predecessor-version":[{"id":4063,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/pages\/4051\/revisions\/4063"}],"up":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/pages\/2984"}],"wp:attachment":[{"href":"https:\/\/led.amasly.com\/vi\/wp-json\/wp\/v2\/media?parent=4051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}