{"id":13876,"date":"2023-08-21T02:58:23","date_gmt":"2023-08-21T02:58:23","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=13876"},"modified":"2023-12-26T08:41:14","modified_gmt":"2023-12-26T08:41:14","slug":"what-is-switched-mode-power-supply-smps","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/pt\/glossary\/what-is-switched-mode-power-supply-smps\/","title":{"rendered":"O que \u00e9 uma Fonte de Alimenta\u00e7\u00e3o Comutada (SMPS)"},"content":{"rendered":"

O que \u00e9 uma Fonte de Alimenta\u00e7\u00e3o Comutada (SMPS)<\/h2>\n\n\n

Uma SMPS, que significa Switched-Mode Power Supply (Fonte de Alimenta\u00e7\u00e3o Comutada), \u00e9 um tipo de fonte de alimenta\u00e7\u00e3o frequentemente utilizado na ind\u00fastria de ilumina\u00e7\u00e3o. Foi concebida para converter de forma eficiente a energia el\u00e9trica de uma forma para outra, utilizando dispositivos de comuta\u00e7\u00e3o como trans\u00edstores ou MOSFETs. Ao contr\u00e1rio das fontes de alimenta\u00e7\u00e3o lineares tradicionais, uma SMPS funciona a frequ\u00eancias elevadas, o que permite uma maior efici\u00eancia na convers\u00e3o de energia e reduz o tamanho e o peso da fonte de alimenta\u00e7\u00e3o.<\/p>\n\n\n\n

O funcionamento de uma SMPS envolve v\u00e1rias etapas:<\/p>\n

Inspire-se com os portf\u00f3lios de sensores de movimento da Rayzeek.<\/h3>

N\u00e3o encontra o que pretende? N\u00e3o se preocupe. Existem sempre formas alternativas de resolver os seus problemas. Talvez um dos nossos portf\u00f3lios possa ajudar.<\/p>

Sensores de movimento PIR<\/p><\/a><\/div><\/div>

Interruptores com Sensor de Movimento<\/p><\/a><\/div><\/div>

Sensores de Presen\u00e7a<\/p><\/a><\/div><\/div>

Sensor de movimento para ar condicionado<\/p><\/a><\/div><\/div>

Fitas LED com Sensor de Movimento<\/p><\/a><\/div><\/div>

Sensores de movimento\/Dimmer DC de baixa tens\u00e3o<\/p><\/a><\/div><\/div>

Kits de sensores de movimento sem fios<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n

    \n
  • Na primeira etapa, a corrente alternada (AC) de entrada \u00e9 retificada e filtrada para produzir um sinal de corrente cont\u00ednua (DC). Isto \u00e9 alcan\u00e7ado atrav\u00e9s da utiliza\u00e7\u00e3o de um retificador e de componentes de filtragem, convertendo a corrente AC numa forma de DC utiliz\u00e1vel. <\/li>\n\n\n\n
  • A segunda etapa de uma SMPS envolve a comuta\u00e7\u00e3o de alta frequ\u00eancia, na qual um comutador de alta frequ\u00eancia processa o sinal DC, criando um sinal DC pulsado de alta frequ\u00eancia. Este funcionamento em alta frequ\u00eancia permite uma convers\u00e3o de energia eficiente e contribui ainda para o tamanho e peso compactos da fonte de alimenta\u00e7\u00e3o.<\/li>\n\n\n\n
  • A terceira etapa de uma SMPS inclui um transformador de pot\u00eancia. O sinal DC de alta tens\u00e3o \u00e9 reduzido para um sinal DC com o n\u00edvel adequado. O transformador desempenha um papel crucial na convers\u00e3o de tens\u00e3o e no isolamento, garantindo que a tens\u00e3o de sa\u00edda corresponde ao n\u00edvel pretendido.<\/li>\n\n\n\n
  • Na quarta etapa, o sinal DC reduzido \u00e9 retificado e filtrado para obter uma sa\u00edda DC est\u00e1vel e constante. Esta etapa \u00e9 essencial para manter uma tens\u00e3o de sa\u00edda est\u00e1vel, isenta de flutua\u00e7\u00f5es ou ru\u00eddo.<\/li>\n\n\n\n
  • A etapa final de uma SMPS \u00e9 o circuito de controlo. Este circuito monitoriza a tens\u00e3o de sa\u00edda e ajusta o comutador de alta frequ\u00eancia de forma din\u00e2mica para manter um fluxo cont\u00ednuo de sa\u00edda com a tens\u00e3o pretendida. O circuito de controlo \u00e9 respons\u00e1vel por regular a tens\u00e3o de sa\u00edda e mant\u00ea-la dentro do intervalo especificado.<\/li>\n<\/ul>\n\n\n\n

    Perguntas frequentes<\/h2>\n\n\n
    \n

    O Que Faz a SMPS<\/h3><\/div><\/div>\n\n\n\n
    \n

    \u00c0 semelhan\u00e7a de outros tipos de fonte de alimenta\u00e7\u00e3o, uma fonte de alimenta\u00e7\u00e3o SMPS transfere energia de uma tomada AC para um dispositivo DC. No entanto, o que distingue a SMPS \u00e9 a sua capacidade de regular a tens\u00e3o de sa\u00edda. Possui a capacidade de ajustar a tens\u00e3o de sa\u00edda para garantir um fornecimento constante, independentemente de quaisquer flutua\u00e7\u00f5es na carga.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    O Que Significa SMPS em Eletricidade<\/h3><\/div><\/div>\n\n\n\n
    \n

    As fontes de alimenta\u00e7\u00e3o comutadas (SMPS), tamb\u00e9m conhecidas como fontes comutadas, s\u00e3o amplamente utilizadas em sistemas el\u00e9tricos para uma convers\u00e3o de energia eficiente. Recebem uma entrada AC da tens\u00e3o da rede el\u00e9trica e convertem-na numa sa\u00edda DC de baixa tens\u00e3o.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    Quais S\u00e3o os Dois Tipos de SMPS<\/h3><\/div><\/div>\n\n\n\n
    \n

    As SMPS podem ser categorizadas em dois tipos, que s\u00e3o os conversores n\u00e3o isolados e os conversores isolados, com base na sua topologia de circuito.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    A SMPS \u00c9 Um Conversor AC\/DC<\/h3><\/div><\/div>\n\n\n\n
    \n

    Em geral, uma SMPS funciona convertendo a tens\u00e3o da fonte AC numa tens\u00e3o DC atrav\u00e9s de um retificador e de um filtro de entrada. Posteriormente, \u00e9 utilizado um chopper para \u201ccortar\u201d a tens\u00e3o DC, resultando numa s\u00e9rie de impulsos de alta frequ\u00eancia em onda quadrada (entre 20 kHz e 10 MHz) na entrada do enrolamento prim\u00e1rio do transformador.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    A SMPS \u00c9 Necess\u00e1ria<\/h3><\/div><\/div>\n\n\n\n
    \n

    O objetivo principal de uma Fonte de Alimenta\u00e7\u00e3o Comutada (SMPS) \u00e9 converter a tens\u00e3o AC ou DC n\u00e3o regulada numa tens\u00e3o DC regulada adequada para dispositivos eletr\u00f3nicos, como computadores. Esta convers\u00e3o \u00e9 necess\u00e1ria porque os computadores e outros equipamentos eletr\u00f3nicos exigem uma fonte de alimenta\u00e7\u00e3o est\u00e1vel e eficiente.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    Por Que Raz\u00e3o a SMPS Se Danifica<\/h3><\/div><\/div>\n\n\n\n
    \n

    A sujidade e subst\u00e2ncias estranhas, tais como o fumo de cigarro e o p\u00f3 dom\u00e9stico, podem causar danos numa SMPS. Adicionalmente, o sobreaquecimento e as falhas de ventila\u00e7\u00e3o s\u00e3o causas comuns de avaria da SMPS. Para evitar isto, \u00e9 importante garantir que a ventila\u00e7\u00e3o est\u00e1 livre de p\u00f3 e obstru\u00e7\u00f5es. \u00c9 tamb\u00e9m recomend\u00e1vel evitar ter a CPU num espa\u00e7o fechado da secret\u00e1ria.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    Como Posso Verificar a Minha Fonte de Alimenta\u00e7\u00e3o SMPS<\/h3><\/div><\/div>\n\n\n\n
    \n

    While voltage measurement can be done easily with the help of an isolation transformer, a more effective method is to utilize a differential probe for high-voltage measurements. Differential probes are equipped with two inputs and are specifically designed to measure the voltage difference between these inputs.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    How Is SMPS Different From Normal Power Supply<\/h3><\/div><\/div>\n\n\n\n
    \n

    An SMPS distinguishes itself from a linear power supply by its method of converting the primary AC voltage into the output DC voltage. Instead of relying on a linear approach, the SMPS employs a power transistor to generate a high-frequency voltage that is subsequently passed through a compact transformer and filtered to eliminate any AC noise.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    Which Device Is Used in SMPS<\/h3><\/div><\/div>\n\n\n\n
    \n

    In SMPS, the inverter utilizes the PWM technique. The inverter’s output is then converted to dc through the use of a diode rectifier. Since the inverter operates at a high frequency, the ripples on the dc output voltage can be easily filtered out using small filter components.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

    \n

    Which Switch Is Used in SMPS<\/h3><\/div><\/div>\n\n\n\n
    \n

    Like other power supplies, an SMPS transfers power from a DC or AC source (often mains power), to DC loads, such as a personal computer, while converting voltage and current characteristics. It utilizes a high-frequency switching converter that converts DC to DC.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

    Doesn\\’t find what you want? Don\\’t worry. There are always alternate ways to solve your problems. Maybe one of our portfolios can help.PIR Motion SensorsMotion Sensor Switches<a href="https:\/\/www.rayzeek.com\/occupancy-vac<\/p>","protected":false},"author":4,"featured_media":12860,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"power supply\", \"idxall\": 1, \"keywordtitlesimi\": 0.8463436961174011, \"keywordslugsimi\": 0.8463436961174011, \"paratitlesimi\": 0.6850572824478149, \"paraslugsimi\": 0.6850572824478149, \"slug\": \"what-is-power-supply\", \"title\": \"What is Power Supply\", \"id\": 14202}, {\"keyword\": \"lighting industry\", \"idxall\": 0, \"keywordtitlesimi\": 0.7885549306869507, \"keywordslugsimi\": 0.7885549306869507, \"paratitlesimi\": 0.5916579633951188, \"paraslugsimi\": 0.5916579633951188, \"slug\": \"tips-for-increasing-the-efficiency-of-commercial-lighting\", \"title\": \"Tips for Increasing the Efficiency of Commercial Lighting\", \"id\": 10327}]","article_topic":"","article_fact_check":"","mt_social_share":"","mt_content_meta":"","mt_glossary_display":"","glossary_heading":"","glossary":"Switched-Mode Power Supply (SMPS)","glossary_alter":"","glossary_def":"","article_task":"","footnotes":""},"categories":[102],"tags":[99],"class_list":["post-13876","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-glossary"],"yoast_head":"\nWhat is Switched-Mode Power Supply (SMPS) - Rayzeek<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Switched-Mode Power Supply (SMPS) - Rayzeek\" \/>\n<meta property=\"og:description\" content=\"Doesn't find what you want? 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