Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c v\u00f4 c\u00f9ng ph\u1ed5 bi\u1ebfn kh\u00f4ng ch\u1ec9 v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft. N\u00f3 c\u00f2n ph\u1ed5 bi\u1ebfn c\u1ea3 trong \u0111\u1eddi s\u1ed1ng th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang ta. Th\u1ebf n\u00ean, bi\u1ebft v\u00e0 v\u1eadn d\u1ee5ng r\u00f5 nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng v\u00e0 c\u1ea7n thi\u1ebft. N\u1ebfu nh\u01b0 b\u1ea1n mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam nh\u1eefng th\u00f4ng tin n\u00e0y, h\u00e3y \u0111\u1ecdc ngay b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y. Ch\u00fang t\u00f4i s\u1ebd mang \u0111\u1ebfn chia s\u1ebb \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 d\u00f2ng \u0111i\u1ec7n g\u00ec? D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u1edbp 9 c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m g\u00ec? C\u00f9ng tham kh\u1ea3o ngay nh\u00e9.<\/p>\n\n\n\n
C\u00e1ch t\u1ea1o n\u00ean d\u00f2ng xoay chi\u1ec1u<\/p>\n\n\n\n
\u0110\u1ecbnh ngh\u0129a v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u<\/p>\n\n\n\n
Nhi\u1ec1u ng\u01b0\u1eddi kh\u00f4ng bi\u1ebft \u0111\u00e2y l\u00e0 g\u00ec. T\u00ean g\u1ecdi kh\u00e1c c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f2n g\u1ecdi l\u00e0 d\u00f2ng AC. AC l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Alternating Current. D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 chi\u1ec1u s\u1ebd thay \u0111\u1ed5i theo th\u1eddi gian. Nh\u1eafc \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i n\u00e0y, n\u00f3 th\u01b0\u1eddng tu\u1ea7n ho\u00e0n theo m\u1ed9t chu k\u1ef3 \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn. D\u00f2ng \u0111i\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o ra l\u00e0 do bi\u1ebfn \u0111\u1ed5 t\u1eeb ngu\u1ed3n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u. Ngo\u00e0i ra, ch\u00fang c\u0169ng bi\u1ebfn \u0111\u1ed5i t\u1eeb c\u00e1c m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u. B\u1edfi th\u1ebf, r\u1ea5t nhi\u1ec1u \u0111\u1ed3 d\u00f9ng trong gia \u0111\u00ecnh c\u1ee7a ch\u00fang ta \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u n\u00e0y. C\u00f3 th\u1ec3 nh\u1eafc \u0111\u1ebfn nh\u1eefng thi\u1ebft b\u1ecb nh\u01b0 t\u1ee7 l\u1ea1nh, m\u00e1y gi\u1eb7t, m\u00e1y l\u1ea1nh\u2026<\/p>\n\n\n\n
C\u00e1ch n\u00e0o \u0111\u1ec3 t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u?<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u1edbp 9, c\u00e1ch t\u1ea1o ra kh\u00f4ng c\u00f3 g\u00ec qu\u00e1 kh\u00f3 kh\u0103n. \u0110\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c vi\u1ec7c n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m theo 2 c\u00e1ch kh\u00e1c nhau. N\u1ebfu c\u00f3 \u0111i\u1ec1u ki\u1ec7n, b\u1ea1n h\u00e3y th\u1eed trong ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 c\u00f3 s\u1ef1 h\u01b0\u1edbng d\u1eabn c\u1ee7a gi\u00e1o vi\u00ean<\/a> nh\u00e9. Ch\u1eafc ch\u1eafn nh\u1eefng th\u00f4ng tin m\u00e0 b\u1ea1n thu ho\u1ea1ch \u0111\u01b0\u1ee3c s\u1ebd kh\u00f4ng l\u00e0m cho b\u1ea1n th\u1ea5y th\u1ea5t v\u1ecdng.<\/p>\n\n\n\n C\u00e1ch \u0111\u1ea7u ti\u00ean, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t m\u1ed9t cu\u1ed9n d\u00e2y d\u1eabn k\u00edn. Sau \u0111\u00f3, b\u1ea1n cho nam ch\u00e2m quay xung quanh cu\u1ed9n d\u00e2y d\u1eabn \u0111\u00f3. C\u00e1ch n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n thu \u0111\u01b0\u1ee3c d\u00f2ng AC t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n C\u00e1ch th\u00fa hai, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ec3 cu\u1ed9n d\u00e2y d\u1eabn k\u00edn xung quanh t\u1eeb tr\u01b0\u1eddng c\u1ee7a nam ch\u00e2m. C\u00e1ch n\u00e0y hay \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng, k\u1ec3 c\u1ea3 trong th\u1ef1c t\u1ebf. Thu \u0111\u01b0\u1ee3c d\u00f2ng AC qua c\u00e1ch n\u00e0y c\u0169ng kh\u00f4ng g\u1eb7p qu\u00e1 nhi\u1ec1u kh\u00f3 kh\u0103n.<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n AC c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n C\u00f3 nhi\u1ec1u \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u, d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 nhi\u1ec1u t\u00e1c d\u1ee5ng. Ch\u00fang c\u0169ng \u0111\u01b0a ra nh\u1eefng t\u00e1c d\u1ee5ng v\u1ec1 t\u1eeb, quang v\u00e0 t\u00e1c d\u1ee5ng nhi\u1ec7t. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1edbi d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u c\u1ee7a d\u00f2ng AC \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 nh\u01b0 sau. Khi d\u00f2ng \u0111i\u1ec7n \u0111\u1ed5i chi\u1ec1u, t\u00e1c d\u1ee5ng c\u1ee7a l\u1ef1c t\u1eeb l\u00ean nam ch\u00e2m c\u0169ng s\u1ebd \u0111\u1ed5i chi\u1ec1u.<\/p>\n\n\n\n T\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n V\u1ec1 t\u00e1c d\u1ee5ng t\u1eeb, ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadn th\u1ea5y qua th\u00ed nghi\u1ec7m sau. Ta \u0111\u01b0a m\u1ed9t chi\u1ebfc \u0111inh s\u1eaft l\u1ea1i g\u1ea7n s\u00e1t v\u1edbi m\u1ed9t cu\u1ed9n d\u00e2y. N\u1ebfu nh\u01b0 ta th\u1ea5y chi\u1ebfc \u0111inh s\u1eaft b\u1ecb cu\u1ed9n d\u00e2y h\u00fat v\u00e0o, \u0111\u00f3 l\u00e0 bi\u1ec3u hi\u1ec7n t\u00e1c d\u1ee5ng t\u1eeb. Vi\u1ec7c n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng quan s\u00e1t b\u1eb1ng m\u1eaft th\u01b0\u1eddng kh\u00f4ng m\u1ea5y kh\u00f3 kh\u0103n.<\/p>\n\n\n\n Kh\u00f4ng ch\u1ec9 c\u00f3 v\u1eady, t\u00e1c d\u1ee5ng t\u1eeb c\u1ee7a cu\u1ed9n d\u00e2y t\u1edbi nam ch\u00e2m c\u0169ng c\u00f3 bi\u1ebfn \u0111\u1ed5i. Ch\u00fang s\u1ebd thay \u0111\u1ed5i khi m\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u1ed5i chi\u1ec1u.<\/p>\n\n\n\n T\u00e1c d\u1ee5ng quang c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n Kh\u00f4ng kh\u00f3 \u0111\u1ec3 nh\u1eadn th\u1ea5y nh\u1eefng t\u00e1c d\u1ee5ng v\u1ec1 quang h\u1ecdc c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u. C\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y m\u1ed9t s\u1ed1 minh ch\u1ee9ng khi ch\u00fa \u00fd v\u1ec1 c\u00e1c lo\u1ea1i b\u00f3ng \u0111\u00e8n ph\u00e1t s\u00e1ng. M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 nh\u01b0: B\u00fat th\u1eed \u0111i\u1ec7n c\u00f3 \u0111\u00e8n, b\u00f3ng \u0111\u00e8n d\u00e2y t\u00f3c\u2026 \u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do v\u00ec sao m\u00e0 b\u00f3ng \u0111\u00e8n \u0111\u01b0\u1ee3c l\u1eafp v\u00e0o cu\u1ed1i b\u00fat th\u1eed \u0111i\u1ec7n. Nh\u00ecn nh\u1eadn b\u1eb1ng m\u1eaft xem t\u1ea1i n\u01a1i th\u1eed c\u00f3 \u0111i\u1ec7n hay kh\u00f4ng l\u00e0 c\u00e1ch nhanh nh\u1ea5t v\u00e0 ti\u1ec7n nh\u1ea5t.<\/p>\n\n\n\n Th\u00ed nghi\u1ec7m d\u00f2ng xoay chi\u1ec1u<\/p>\n\n\n\n T\u00e1c d\u1ee5ng nhi\u1ec7t c\u1ee7a d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n M\u1ed9t trong nh\u1eefng v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh nh\u1ea5t v\u1ec1 t\u00e1c d\u1ee5ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, ch\u00ednh l\u00e0 t\u00e1c d\u1ee5ng nhi\u1ec7t. V\u00ed d\u1ee5 d\u1ec5 \u0111\u1ec3 t\u01b0\u1edfng t\u01b0\u1ee3ng v\u00e0 ngh\u0129 \u0111\u1ebfn nh\u1ea5t ch\u00ednh l\u00e0 v\u1ec1 b\u00f3ng \u0111i\u1ec7n d\u00e2y t\u00f3c. Khi s\u1eed d\u1ee5ng b\u00f3ng \u0111\u00e8n n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c nhi\u1ec7t l\u01b0\u1ee3ng t\u1eeb b\u00f3ng \u0111\u00e8n.<\/p>\n\n\n\n Kh\u00f4ng ch\u1ec9 c\u00f3 nh\u1eefng t\u00e1c d\u1ee5ng nhi\u1ec7t kh\u00f4ng mong mu\u1ed1n n\u00e0y, d\u00f2ng \u0111i\u1ec7n c\u00f2n c\u00f3 nhi\u1ec1u t\u00e1c d\u1ee5ng nhi\u1ec7t kh\u00e1c. \u1ee8ng d\u1ee5ng \u0111i\u1ec7n v\u00e0o nh\u1eefng thi\u1ebft k\u1ebf<\/a> c\u00f3 \u00edch nh\u01b0 l\u00f2 s\u01b0\u1edfi \u0111i\u1ec7n, b\u00e0n l\u00e0\u2026<\/p>\n\n\n\n M\u1ed9t s\u1ed1 \u0111\u1ea1i l\u01b0\u1ee3ng quan tr\u1ecdng khi nh\u1eafc \u0111\u1ebfn d\u00f2ng AC<\/p>\n\n\n\n C\u00f4ng su\u1ea5t c\u1ee7a \u0111i\u1ec7n xoay chi\u1ec1u<\/p>\n\n\n\n C\u00f4ng su\u1ea5t d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u1ea1i l\u01b0\u1ee3ng quan tr\u1ecdng b\u1eaft bu\u1ed9c ph\u1ea3i nh\u1eafc \u0111\u1ebfn \u0111\u1ea7u ti\u00ean. C\u00f4ng su\u1ea5t n\u00e0y s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o 3 \u0111\u1ea1i l\u01b0\u1ee3ng ch\u00ednh. \u0110\u00f3 l\u00e0 \u0111\u1ed9 l\u1ec7ch pha c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 so v\u1edbi \u0111i\u1ec7n \u00e1p; \u0111i\u1ec7n \u00e1p v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n. C\u00f4ng th\u1ee9c ch\u00ednh c\u1ee7a c\u00f4ng su\u1ea5t n\u00e0y l\u00e0: P = U.I.cos\u03b1<\/p>\n\n\n\n V\u1edbi:<\/p>\n\n\n\n Chu k\u1ef3 v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng AC<\/p>\n\n\n\n Kh\u00e1i ni\u1ec7m d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u<\/p>\n\n\n\n \u0110i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ee7a d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u v\u00e0 d\u00f2ng xoay chi\u1ec1u l\u00e0 g\u00ec?<\/p>\n\n\n\n \u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u l\u00e0 ch\u00fang kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i theo th\u1eddi gian. Ngo\u00e0i ra, d\u00f2ng \u0111i\u1ec7n 1 chi\u1ec1u lu\u00f4n \u0111i theo m\u1ed9t h\u01b0\u1edbng c\u1ed1 \u0111\u1ecbnh. B\u1edfi th\u1ebf, khi nh\u00ecn v\u00e0o hai lo\u1ea1i d\u00f2ng \u0111i\u1ec7n n\u00e0y, ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadn th\u1ea5y nh\u1eefng s\u1ef1 kh\u00e1c bi\u1ec7t. C\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t nh\u1edd nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m sau:<\/p>\n\n\n\n Ph\u00e2n bi\u1ec7t d\u00f2ng \u0111i\u1ec7n AC 1 pha v\u00e0 3 pha<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n AC 1 pha<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n 1 pha l\u00e0 d\u00f2ng m\u00e0 trong \u0111\u00f3, d\u00f2ng \u0111i\u1ec7n c\u00f3 hai d\u00e2y n\u1ed1i c\u00f9ng v\u1edbi ngu\u1ed3n \u0111i\u1ec7n. Chi\u1ec1u v\u00e0 h\u01b0\u1edbng c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n b\u00ean trong s\u1ebd thay \u0111\u1ed5i nhi\u1ec1u. S\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a n\u00f3 t\u00f9y thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 t\u1eeb ngu\u1ed3n \u0111i\u1ec7n \u1edf b\u00ean trong m\u1ea1ch.<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n 220V s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p cho t\u1eebng h\u1ed9 gia \u0111\u00ecnh. L\u1ef1a ch\u1ecdn c\u1ee7a ph\u1ea7n l\u1edbn c\u00e1c h\u1ed9 \u0111\u1ec1u l\u00e0 \u0111i\u1ec7n xoay chi\u1ec1u 1 pha, ch\u00fang c\u00f3 2 d\u00e2y bao g\u1ed3m d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh.<\/p>\n\n\n\n D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u 3 pha<\/p>\n\n\n\n V\u1edbi d\u00f2ng 3 pha, ch\u00fang s\u1ebd gi\u1ed1ng v\u1edbi 3 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n 1 pha v\u00e0 ch\u1ea1y song song v\u1edbi nhau. Ngo\u00e0i ra, ch\u00fang c\u00f3 c\u00f9ng chung m\u1ed9t d\u00e2y trung t\u00ednh. Th\u1ebf n\u00ean, h\u1ec7 th\u1ed1ng \u0111i\u1ec7n trong sinh ho\u1ea1t n\u00e0y s\u1ebd c\u00f3 4 d\u00e2y. Ch\u00fang bao g\u1ed3m 3 d\u00e2y n\u00f3ng v\u00e0 1 d\u00e2y l\u1ea1nh.<\/p>\n\n\n\n T\u00ecm hi\u1ec3u th\u00eam nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ee5 th\u1ec3 v\u1ec1 m\u00e1y ph\u00e1t \u0111i\u1ec7n xoay chi\u1ec1u<\/p><\/blockquote>\n\n\n\n Th\u00f4ng s\u1ed1 v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u<\/p>\n\n\n\n Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin m\u00e0 ch\u00fang t\u00f4i \u0111\u01b0a \u0111\u1ebfn cho b\u1ea1n v\u1ec1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u. Ch\u00fang t\u00f4i tin r\u1eb1ng c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o v\u00e0 hi\u1ec3u h\u01a1n v\u1ec1 d\u00f2ng \u0111i\u1ec7n n\u00e0y. Ngo\u00e0i ra v\u1edbi nh\u1eefng h\u1ecdc sinh<\/a> l\u1edbp 9 ho\u1eb7c c\u00e1c l\u1edbp cao h\u01a1n, c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng v\u00e0o b\u00e0i h\u1ecdc c\u1ee7a m\u00ecnh. \u0110\u1eebng qu\u00ean tham kh\u1ea3o th\u00eam nh\u1eefng th\u00f4ng tin kh\u00e1c tr\u00ean website c\u1ee7a ch\u00fang t\u00f4i c\u00e1c b\u1ea1n nh\u00e9. \u0110\u1ecdc ngay l\u00fd thuy\u1ebft v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb \u0111\u1ec3 hi\u1ec3u th\u00eam b\u1ea1n nh\u00e9.<\/p>\n\n\n\n Kh\u00e1m ph\u00e1 th\u00eam nh\u1eefng b\u00e0i h\u1ecdc, ch\u1ee7 \u0111\u1ec1 m\u1edbi<\/p><\/blockquote>\n\n\n\n S\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n chi\u1ec1u d\u00f2ng \u0111i\u1ec7n l\u00e0 g\u00ec? Ki\u1ebfn th\u1ee9c v\u1eadt l\u00fd 7<\/p>\n\n\n\n C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u2013 \u0110\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c, ph\u00e2n lo\u1ea1i v\u00e0 \u00fd ngh<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":" Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c v\u00f4 c\u00f9ng ph\u1ed5 bi\u1ebfn kh\u00f4ng ch\u1ec9 v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft. N\u00f3 c\u00f2n ph\u1ed5 bi\u1ebfn c\u1ea3 trong \u0111\u1eddi s\u1ed1ng th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang ta. Th\u1ebf n\u00ean, bi\u1ebft v\u00e0 v\u1eadn d\u1ee5ng r\u00f5 nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng v\u00e0 c\u1ea7n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4,7],"tags":[],"class_list":["post-1011","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1011"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1011\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} P l\u00e0 c\u00f4ng su\u1ea5t c\u1ee7a d\u00f2ng \u0111i\u1ec7n AC, \u0111\u01a1n v\u1ecb l\u00e0 W\n\n U l\u00e0 \u0111i\u1ec7n \u00e1p, \u0111\u01a1n v\u1ecb l\u00e0 V\n\n I l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n, \u0111\u01a1n v\u1ecb l\u00e0 A\n\n Alpha l\u00e0 \u0111\u1ed9 l\u1ec7ch pha gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u1edbi \u0111i\u1ec7n \u00e1p.<\/code><\/pre>\n\n\n\n Chu k\u1ef3 c\u00f3 k\u00fd hi\u1ec7u l\u00e0 T, ch\u00fang c\u00f3 \u0111\u01a1n v\u1ecb l\u00e0 gi\u00e2y. \u0110\u00e2y ch\u00ednh l\u00e0 kho\u1ea3ng th\u1eddi gian d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 th\u1ec3 tr\u1edf l\u1ea1i v\u1ecb tr\u00ed ban \u0111\u1ea7u.\n\n T\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n AC l\u00e0 F, c\u00f3 \u0111\u01a1n v\u1ecb t\u00ednh l\u00e0 Hz. \u0110\u1ea1i l\u01b0\u1ee3ng n\u00e0y bi\u1ec3u hi\u1ec7n s\u1ed1 l\u1ea7n l\u1eb7p l\u1ea1i \u1edf tr\u1ea1ng th\u00e1i c\u0169 c\u1ee7a d\u00f2ng AC \u1edf trong 1s.<\/code><\/pre>\n\n\n\n Th\u00f4ng th\u01b0\u1eddng, c\u00e1c nh\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n, c\u00e1c lo\u1ea1i m\u00e1y ph\u00e1t \u0111i\u1ec7n s\u1ebd s\u1ea3n xu\u1ea5t ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u. L\u00fd do l\u00e0 b\u1edfi d\u00f2ng \u0111i\u1ec7n n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng truy\u1ec1n t\u1ea3i ra xa. Do \u0111\u00f3 ch\u00fang r\u1ea5t ph\u00f9 h\u1ee3p n\u1ebfu ta s\u1eed d\u1ee5ng \u0111\u1ec3 sinh ho\u1ea1t h\u00e0ng ng\u00e0y. Nh\u1edd v\u1eady m\u00e0 nh\u1eefng v\u00f9ng qu\u00ea \u1edf xa x\u00f4i v\u1eabn nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u0111\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng. D\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb nh\u1eefng thi\u1ebft b\u1ecb nh\u01b0 pin, n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, \u1eafc quy\u2026 Do \u0111\u00f3 ch\u00fang kh\u00f4ng th\u1ec3 truy\u1ec1n t\u1ea3i \u0111\u01b0\u1ee3c \u0111i xa. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m t\u1ed1n r\u1ea5t nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng.\n\n T\u1ea7n s\u1ed1 tr\u1ef1c ti\u1ebfp c\u1ee7a d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u l\u00e0 0. Th\u1ebf n\u00ean ch\u00fang ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ea3y \u0111\u01b0\u1ee3c theo m\u1ed9t h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh. C\u00f2n v\u1edbi d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u, ch\u00fang c\u00f3 t\u1ea7n s\u1ed1 kh\u00e1c bi\u1ec7t h\u01a1n. T\u1ea7n s\u1ed1 dao \u0111\u1ed9ng trong kho\u1ea3ng 50Hz \u0111\u1ebfn 60Hz, th\u1ebf n\u00ean ch\u00fang c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c.\n\n Ngo\u00e0i ra, b\u00ean trong nh\u1eefng b\u1ea3n v\u1ebd m\u1ea1ch \u0111i\u1ec7n, c\u00e1c d\u1ea1ng s\u00f3ng bi\u1ec3u th\u1ecb cho d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u h\u1ea7u nh\u01b0 l\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng. Kh\u00e1c bi\u1ec7t h\u01a1n, m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u l\u1ea1i \u0111a d\u1ea1ng h\u00ecnh v\u1ebd. C\u00f3 th\u1ec3 l\u00e0 h\u00ecnh vu\u00f4ng, h\u00ecnh thang, h\u00ecnh sin, h\u00ecnh tam gi\u00e1c\u2026<\/code><\/pre>\n\n\n\n