{"id":43526,"date":"2024-04-16T21:32:58","date_gmt":"2024-04-17T02:32:58","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/designing-for-power-and-efficiency-essential-considerations-for-ultrasonic-generator-circuits\/"},"modified":"2025-01-21T07:07:19","modified_gmt":"2025-01-21T12:07:19","slug":"designing-for-power-and-efficiency-essential-considerations-for-ultrasonic-generator-circuits","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/designing-for-power-and-efficiency-essential-considerations-for-ultrasonic-generator-circuits\/","title":{"rendered":"Thi\u1ebft k\u1ebf m\u1ea1ch si\u00eau \u00e2m: C\u00f4ng su\u1ea5t &#038; Hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u"},"content":{"rendered":"<p>Vi\u1ec7c thi\u1ebft k\u1ebf m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng gi\u1eefa c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t. M\u1ed9t m\u1ea1ch t\u1ea1o s\u00f3ng hi\u1ec7u qu\u1ea3 kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o c\u00f4ng su\u1ea5t \u0111\u1ea7u ra \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng m\u00e0 c\u00f2n ph\u1ea3i gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a t\u1ed5n hao n\u0103ng l\u01b0\u1ee3ng, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m chi ph\u00ed v\u1eadn h\u00e0nh v\u00e0 t\u0103ng tu\u1ed5i th\u1ecd c\u1ee7a h\u1ec7 th\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu c\u1ea7n xem x\u00e9t khi thi\u1ebft k\u1ebf m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m h\u01b0\u1edbng \u0111\u1ebfn c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n<h3>Ch\u1ecdn t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>T\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh ngay t\u1eeb giai \u0111o\u1ea1n \u0111\u1ea7u c\u1ee7a qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf.  T\u1ea7n s\u1ed1 n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng xuy\u00ean th\u1ea5u c\u1ee7a s\u00f3ng si\u00eau \u00e2m. Vi\u1ec7c l\u1ef1a ch\u1ecdn t\u1ea7n s\u1ed1 ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. V\u00ed d\u1ee5, c\u00e1c \u1ee9ng d\u1ee5ng l\u00e0m s\u1ea1ch th\u01b0\u1eddng s\u1eed d\u1ee5ng t\u1ea7n s\u1ed1 t\u1eeb 20kHz \u0111\u1ebfn 40kHz, trong khi c\u00e1c \u1ee9ng d\u1ee5ng y t\u1ebf c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u1ea7n s\u1ed1 cao h\u01a1n.<\/p>\n<h3>Thi\u1ebft k\u1ebf m\u1ea1ch dao \u0111\u1ed9ng<\/h3>\n<p>M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 tr\u00e1i tim c\u1ee7a b\u1ed9 t\u1ea1o s\u00f3ng si\u00eau \u00e2m.  C\u00f3 nhi\u1ec1u lo\u1ea1i m\u1ea1ch dao \u0111\u1ed9ng kh\u00e1c nhau, bao g\u1ed3m m\u1ea1ch dao \u0111\u1ed9ng Colpitts, Hartley, v\u00e0 m\u1ea1ch dao \u0111\u1ed9ng tinh th\u1ec3.  Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u1ea1ch dao \u0111\u1ed9ng ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh t\u1ea7n s\u1ed1, c\u00f4ng su\u1ea5t \u0111\u1ea7u ra v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a m\u1ea1ch.<\/p>\n<h3>L\u1ef1a ch\u1ecdn linh ki\u1ec7n<\/h3>\n<p>Linh ki\u1ec7n \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m.  Transistor c\u00f4ng su\u1ea5t, t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn c\u1ea9n th\u1eadn \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Linh ki\u1ec7n<\/th>\n<th>\u0110\u1eb7c \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Transistor c\u00f4ng su\u1ea5t<\/td>\n<td>\u0110i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng, d\u00f2ng \u0111i\u1ec7n ch\u1ecbu \u0111\u1ef1ng, t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>T\u1ee5 \u0111i\u1ec7n<\/td>\n<td>\u0110i\u1ec7n dung, \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng, ESR (Equivalent Series Resistance)<\/td>\n<\/tr>\n<tr>\n<td>Cu\u1ed9n c\u1ea3m<\/td>\n<td>\u0110\u1ed9 t\u1ef1 c\u1ea3m, d\u00f2ng \u0111i\u1ec7n ch\u1ecbu \u0111\u1ef1ng, \u0111i\u1ec7n tr\u1edf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>B\u1ed9 ph\u1eadn ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng<\/h3>\n<p>S\u1ef1 ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng gi\u1eefa m\u1ea1ch t\u1ea1o s\u00f3ng v\u00e0 \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng.  M\u1ed9t b\u1ed9 ph\u1eadn ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ed1t s\u1ebd gi\u00fap gi\u1ea3m thi\u1ec3u ph\u1ea3n x\u1ea1 s\u00f3ng v\u00e0 t\u0103ng hi\u1ec7u su\u1ea5t chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<h3>H\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t<\/h3>\n<p>Do ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00f4ng su\u1ea5t cao, m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m th\u01b0\u1eddng sinh ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u00e1ng k\u1ec3.  V\u00ec v\u1eady, vi\u1ec7c thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t hi\u1ec7u qu\u1ea3 l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a h\u1ec7 th\u1ed1ng.  C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t ph\u1ed5 bi\u1ebfn bao g\u1ed3m s\u1eed d\u1ee5ng t\u1ea3n nhi\u1ec7t, qu\u1ea1t gi\u00f3 ho\u1eb7c l\u00e0m m\u00e1t b\u1eb1ng ch\u1ea5t l\u1ecfng.<\/p>\n<h3>Ki\u1ec3m so\u00e1t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n<p>Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n v\u00e0 \u0111i\u1ec1u ch\u1ec9nh cho ph\u00e9p ng\u01b0\u1eddi s\u1eed d\u1ee5ng ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00f4ng su\u1ea5t v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ea7u ra c\u1ee7a b\u1ed9 t\u1ea1o s\u00f3ng si\u00eau \u00e2m. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao.  V\u00ed d\u1ee5, n\u1ebfu c\u1ea7n \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u c\u1ee5 th\u1ec3 trong ng\u1eef c\u1ea3nh ki\u1ec3m so\u00e1t v\u00e0 hi\u1ec7u chu\u1ea9n thi\u1ebft b\u1ecb si\u00eau \u00e2m, Beijing Ultrasonic c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c thi\u1ebft k\u1ebf m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m hi\u1ec7u qu\u1ea3 v\u00e0 m\u1ea1nh m\u1ebd \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 c\u00e1c nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00f3ng si\u00eau \u00e2m c\u0169ng nh\u01b0 s\u1ef1 c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng trong vi\u1ec7c l\u1ef1a ch\u1ecdn linh ki\u1ec7n v\u00e0 thi\u1ebft k\u1ebf m\u1ea1ch.  B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00e3 \u0111\u1ec1 c\u1eadp trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u kh\u1eaft khe c\u1ee7a nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c thi\u1ebft k\u1ebf m\u1ea1ch t\u1ea1o s\u00f3ng si\u00eau \u00e2m \u0111\u00f2i h\u1ecfi s\u1ef1 c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng gi\u1eefa c\u00f4ng su\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t. M\u1ed9t m\u1ea1ch t\u1ea1o s\u00f3ng hi\u1ec7u qu\u1ea3 kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o c\u00f4ng su\u1ea5t \u0111\u1ea7u ra \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng m\u00e0 c\u00f2n ph\u1ea3i gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a t\u1ed5n hao n\u0103ng l\u01b0\u1ee3ng,<\/p>\n","protected":false},"author":1,"featured_media":24652,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-43526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/43526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=43526"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/43526\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/24652"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=43526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=43526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=43526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}