{"id":4776,"date":"2025-06-03T09:21:04","date_gmt":"2025-06-03T09:21:04","guid":{"rendered":"http:\/\/br.object-c.cn\/?p=4776"},"modified":"2025-06-24T18:24:48","modified_gmt":"2025-06-24T10:24:48","slug":"a-transferencia-de-energia-sem-fios-ultrapassa-a-barreira-dos-90-de-eficiencia","status":"publish","type":"post","link":"https:\/\/www.brilhoelectroparts.com\/pt\/wireless-power-transfer-breaking-the-90-efficiency-barrier\/","title":{"rendered":"Transfer\u00eancia de energia sem fios: ultrapassar a barreira de efici\u00eancia de 90%"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Introdu\u00e7\u00e3o<\/strong><\/h2><p>O mercado do carregamento sem fios atingir\u00e1&nbsp;<strong>1,427 mil milh\u00f5es at\u00e9 2027<\/strong>&nbsp;(Allied Market Research), mas as perdas de efici\u00eancia continuam a ser o calcanhar de Aquiles:<\/p><ul class=\"wp-block-list\"><li><strong>Os sistemas convencionais desperdi\u00e7am entre 15 e 251 TP3T sob a forma de calor<\/strong><\/li>\n\n<li><strong>Queda de efici\u00eancia do 3-5% por mil\u00edmetro de desalinhamento<\/strong><\/li>\n\n<li><strong>As restri\u00e7\u00f5es t\u00e9rmicas limitam o aumento da pot\u00eancia<\/strong><\/li><\/ul><p>O laborat\u00f3rio de eletr\u00f3nica de pot\u00eancia da Briltech revela como as novas arquiteturas de bobinas e os novos algoritmos de controlo est\u00e3o a resolver estes desafios.<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 1: Avan\u00e7os no design das bobinas<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>1.1 Estruturas magn\u00e9ticas impressas em 3D<\/strong><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tipo de projeto<\/th><th>Coeficiente de acoplamento<\/th><th>Fator de custo<\/th><\/tr><\/thead><tbody><tr><td>Espiral plana<\/td><td>0.65-0.75<\/td><td>$<\/td><\/tr><tr><td>Panqueca bipolar<\/td><td>0.78-0.85<\/td><td>$$<\/td><\/tr><tr><td>Ferrita h\u00edbrida<\/td><td>0.88-0.92<\/td><td>$$$<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Estudo de caso:<\/strong>&nbsp;O nosso design em disposi\u00e7\u00e3o hexagonal foi concretizado&nbsp;<strong>92,31 % de efici\u00eancia TP3T<\/strong>&nbsp;a 65 W (especifica\u00e7\u00e3o Qi 1.3) com um aumento de temperatura inferior a 5 \u00b0C.<\/p><h3 class=\"wp-block-heading\"><strong>1.2 Compensa\u00e7\u00e3o ativa do alinhamento<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>Matrizes de sensores Hall<\/strong>\u00a0detetar a posi\u00e7\u00e3o do recetor (precis\u00e3o de \u00b10,25 mm)<\/li>\n\n<li><strong>Segmenta\u00e7\u00e3o din\u00e2mica de bobinas<\/strong>\u00a0mant\u00e9m uma efici\u00eancia superior a 851 TP3T em movimentos de 15 mm nos eixos X e Y<\/li><\/ul><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 2: Inova\u00e7\u00f5es no setor dos semicondutores<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>2.1 Desempenho do GaN em compara\u00e7\u00e3o com o MOSFET de Si<\/strong><\/h3><p>texto<\/p><p>Copiar<\/p><p>Descarregar<\/p><pre class=\"wp-block-preformatted\">Compara\u00e7\u00e3o de carregadores sem fios de 65 W:  \nPar\u00e2metro Si MOSFET   GaN HEMT   Melhoria  \nPerda de comuta\u00e7\u00e3o  1,2 W 0,45 W 62,51 TP3T  \nTempo de subida 28 ns 9 ns 67,81 TP3T  \nEfici\u00eancia do sistema     881 TP3T 91,51 TP3T 3,5 pontos  <\/pre><h3 class=\"wp-block-heading\"><strong>2.2 Controlo adaptativo de frequ\u00eancia<\/strong><\/h3><p><strong>L\u00f3gica do algoritmo:<\/strong><\/p><pre class=\"wp-block-preformatted\">if (k &lt; 0,7) {  \n  freq += 5 kHz; <em>\/\/ Aumentar a resson\u00e2ncia  <\/em>\n} else if (temp &gt; 60 \u00b0C) {  \n  freq -= 10 kHz; <em>\/\/ Reduzir as correntes parasitas  <\/em>\n}  <\/pre><hr class=\"wp-block-separator has-alpha-channel-opacity\"\/><h2 class=\"wp-block-heading\"><strong>Sec\u00e7\u00e3o 3: Conformidade regulamentar<\/strong><\/h2><h3 class=\"wp-block-heading\"><strong>3.1 T\u00e9cnicas de redu\u00e7\u00e3o de interfer\u00eancias eletromagn\u00e9ticas<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>Sincroniza\u00e7\u00e3o por espectro alargado<\/strong>\u00a0(Em conformidade com a Parte 15 da FCC)<\/li>\n\n<li><strong>Fio Litz blindado<\/strong>\u00a0reduz as emiss\u00f5es radiadas em 12 dB<\/li><\/ul><h3 class=\"wp-block-heading\"><strong>3.2 Protocolos de seguran\u00e7a<\/strong><\/h3><ul class=\"wp-block-list\"><li><strong>Detec\u00e7\u00e3o de objetos estranhos<\/strong>\u00a0Sensibilidade ao (FOD):<ul class=\"wp-block-list\"><li>Metal: limiar de dete\u00e7\u00e3o de 0,5 g<\/li>\n\n<li>Tecido vivo: monitoriza\u00e7\u00e3o da temperatura a 0,1 \u00b0C<\/li><\/ul><\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>Introduction The wireless charging market will reach&nbsp;$27 billion by 2027&nbsp;(Allied Market Research), yet efficiency losses remain the Achilles&#8217; heel: Briltech&#8217;s<\/p>","protected":false},"author":1,"featured_media":4799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4776","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-success-case"],"_links":{"self":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts\/4776","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/comments?post=4776"}],"version-history":[{"count":0,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/posts\/4776\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/media\/4799"}],"wp:attachment":[{"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/media?parent=4776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/categories?post=4776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.brilhoelectroparts.com\/pt\/wp-json\/wp\/v2\/tags?post=4776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}