{"id":80475,"date":"2024-01-14T13:06:06","date_gmt":"2024-01-14T13:06:06","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/tipos-de-voltimetros\/"},"modified":"2024-01-20T09:49:05","modified_gmt":"2024-01-20T09:49:05","slug":"tipos-de-voltimetros","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/tipos-de-voltimetros\/","title":{"rendered":"Tipos de volt\u00edmetros"},"content":{"rendered":"<h2>Tipos de Volt\u00edmetros<\/h2>\n<p>Os volt\u00edmetros s\u00e3o instrumentos essenciais na medi\u00e7\u00e3o da diferen\u00e7a de potencial el\u00e9trico entre dois pontos em um circuito el\u00e9trico. Para determinar a diferen\u00e7a de potencial entre quaisquer dois pontos, os terminais do volt\u00edmetro s\u00e3o conectados entre esses pontos sem a necessidade de cortar ou interromper o fio. A diferen\u00e7a de potencial \u00e9 representada pela f\u00f3rmula \u0394V = Va &#8211; Vb.<\/p>\n<h2>Princ\u00edpios de Funcionamento e Tipos<\/h2>\n<p>Existem diversos tipos de volt\u00edmetros, cada um com seu princ\u00edpio de constru\u00e7\u00e3o e tipo de medi\u00e7\u00e3o. Entre os mais comuns, destacam-se:<\/p>\n<ul>\n<li><strong>Volt\u00edmetro de Bobina M\u00f3vel com \u00cdm\u00e3 Permanente (PMMC)<\/strong>: Conhecido tamb\u00e9m como medidor D\u2019Arsonval ou galvan\u00f4metro, utiliza o princ\u00edpio de deflex\u00e3o angular em um campo magn\u00e9tico uniforme para determinar a corrente que flui pela bobina.<\/li>\n<li><strong>Volt\u00edmetro de Ferro M\u00f3vel<\/strong>: Utilizado principalmente para medir tens\u00f5es e correntes alternadas, onde o sistema m\u00f3vel consiste em uma ou mais pe\u00e7as de ferro macio, que reagem \u00e0 corrente na bobina.<\/li>\n<li><strong>Volt\u00edmetro Digital (DVM)<\/strong>: Exibe valores de tens\u00e3o AC e DC usando n\u00fameros discretos ao inv\u00e9s de deflex\u00e3o de ponteiros. S\u00e3o baseados em um tipo especial de conversor anal\u00f3gico-digital chamado conversor integrador.<\/li>\n<li><strong>Eletrodinam\u00f4metro<\/strong>: Utilizado como volt\u00edmetro e amper\u00edmetro de corrente alternada, especialmente em frequ\u00eancias de pot\u00eancia e baixa frequ\u00eancia de \u00e1udio.<\/li>\n<li><strong>Volt\u00edmetro de Tipo Retificador<\/strong>: Converte corrente alternada (AC) em corrente cont\u00ednua (DC) para medi\u00e7\u00e3o. Usado tanto para AC quanto para DC.<\/li>\n<li><strong>Volt\u00edmetro de Indu\u00e7\u00e3o<\/strong>: Opera com base no princ\u00edpio da indu\u00e7\u00e3o m\u00fatua e \u00e9 utilizado apenas para medi\u00e7\u00e3o de pot\u00eancia em corrente alternada.<\/li>\n<li><strong>Volt\u00edmetro Eletrost\u00e1tico<\/strong>: \u00danico tipo que mede a tens\u00e3o diretamente, sem o efeito da corrente. Utilizado para medir altos potenciais el\u00e9tricos sem contato f\u00edsico, evitando transfer\u00eancia de carga eletrost\u00e1tica.<\/li>\n<\/ul>\n<h2>Conex\u00e3o e Caracter\u00edsticas Ideais<\/h2>\n<p>Os volt\u00edmetros s\u00e3o conectados em paralelo no circuito e existem em v\u00e1rios estilos. Alguns s\u00e3o alimentados separadamente, como por baterias, enquanto outros s\u00e3o alimentados pela pr\u00f3pria fonte de tens\u00e3o medida. Eles s\u00e3o comumente integrados em mult\u00edmetros modernos.<\/p>\n<p>Um volt\u00edmetro ideal teria resist\u00eancia infinita, para n\u00e3o alterar as correntes do circuito ao ser conectado. Na pr\u00e1tica, os volt\u00edmetros possuem resist\u00eancia finita, mas devem ter resist\u00eancia suficientemente alta para n\u00e3o afetar significativamente as outras correntes no circuito. Volt\u00edmetros capazes de medir diferen\u00e7as de potencial de 1 \u03bcV s\u00e3o comuns, e sensibilidades at\u00e9 10<sup>-12<\/sup> podem ser alcan\u00e7adas. Os medidores digitais podem ser extremamente precisos, com precis\u00e3o tipicamente melhor que 1%. Instrumentos de teste especialmente calibrados apresentam precis\u00f5es ainda maiores.<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>Os voltmeters desempenham um papel fundamental em diversos campos da eletricidade e eletr\u00f4nica, oferecendo medi\u00e7\u00f5es precisas e essenciais para o diagn\u00f3stico e an\u00e1lise de circuitos el\u00e9tricos. Sua escolha depende do tipo de medi\u00e7\u00e3o, precis\u00e3o desejada e caracter\u00edsticas espec\u00edficas do circuito a ser analisado.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/07\/types-of-voltmeters.png\" alt=\"\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/voltmeter\/types-of-voltmeters\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Os diferentes tipos de volt\u00edmetros s\u00e3o determinados pelo princ\u00edpio de constru\u00e7\u00e3o e pelos tipos de medi\u00e7\u00e3o. Tipos de volt\u00edmetros.<\/p>\n","protected":false},"author":1,"featured_media":3091,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80475","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nao-categorizado","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tipos de volt\u00edmetros<\/title>\n<meta name=\"description\" content=\"Os diferentes tipos de volt\u00edmetros s\u00e3o determinados pelo princ\u00edpio de constru\u00e7\u00e3o e pelos tipos de medi\u00e7\u00e3o. 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