{"id":34155,"date":"2024-10-25T23:24:39","date_gmt":"2024-10-25T21:24:39","guid":{"rendered":"https:\/\/www.cpge-brizeux.fr\/wordpress\/non-classe\/electromagnetisme-4-milieux-ferromagnetiques.html"},"modified":"2024-11-05T19:55:51","modified_gmt":"2024-11-05T17:55:51","slug":"electromagnetisme-4-milieux-ferromagnetiques","status":"publish","type":"post","link":"https:\/\/www.cpge-brizeux.fr\/wordpress\/psi\/physchim-psi-2425\/electromagnetisme-4-milieux-ferromagnetiques.html","title":{"rendered":"\u00c9lectromagn\u00e9tisme 4 &#8211; Milieux ferromagn\u00e9tiques"},"content":{"rendered":"<h3>T\u00e9l\u00e9chargements<\/h3>\n<p><a href='https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-content\/uploads\/Electromagnetisme-4-Milieux-ferromagnetiques.pdf'>T\u00e9l\u00e9charger le polycopi\u00e9<\/a><\/p>\n<p><a href='https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-content\/uploads\/Electromagnetisme-4-Milieux-ferromagnetiques.apkg'>T\u00e9l\u00e9charger le fichier Anki<\/a><\/p>\n<p>Devoirs \u00e0 la maison<\/p>\n<ul>\n<li><a href='https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-content\/uploads\/Electromagnetisme-4-Milieux-ferromagnetiques-DM'>DM 1<\/a><\/li>\n<li><a href='https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-content\/uploads\/Electromagnetisme-4-Milieux-ferromagnetiques-DM-1'>DM 2<\/a><\/li>\n<\/ul>\n<h3>Coups de pouce<\/h3>\n<p>Laisser la souris sur le texte pour l&rsquo;afficher.<\/p>\n<div class='coups-de-pouce'>\n<h5>1 &#8211; Pince amp\u00e8re-m\u00e9trique<\/h6>\n<ol>\n<li>D\u00e9terminer le champ [latex]\\vec{H}_I[\/latex] cr\u00e9\u00e9 dans tout l&rsquo;espace par [latex]I(t)[\/latex]. En d\u00e9duire le flux magn\u00e9tique [latex]\\phi_I[\/latex] re\u00e7u par le bobinage.\n<ul>\n<li>Effectuer les 4 \u00e9tapes : analyse de invariances, des sym\u00e9tries, choix de la courbe d&rsquo;Amp\u00e8re et th\u00e9or\u00e8me d&rsquo;Amp\u00e8re (dans un milieu magn\u00e9tique).<\/li>\n<li>Sur quelle surface doit-on int\u00e9grer B ? Cette surface est-elle dans le tore ou en dehors ?<\/li>\n<li>Quelle relation existe-t-il entre [latex]B[\/latex] et [latex]H[\/latex] dans un mat\u00e9riau doux ?<\/li>\n<li>La surface d&rsquo;une spire est orient\u00e9e selon [latex]\\vec{e}_\\theta[\/latex].<\/li>\n<\/ul>\n<\/li>\n<li>D\u00e9terminer le flux [latex]\\phi_i[\/latex] cr\u00e9\u00e9 par [latex]i(t)[\/latex] et re\u00e7u par le bobinage.\n<ul>\n<li>La m\u00e9thode est tr\u00e8s similaire \u00e0 la question pr\u00e9c\u00e9dente.<\/li>\n<\/ul>\n<\/li>\n<li>\u00c9tablir une \u00e9quation diff\u00e9rentielle liant [latex]u(t)[\/latex] et [latex]I(t)[\/latex]\n<ul>\n<li>Repr\u00e9senter le sch\u00e9ma \u00e9lectrique \u00e9quivalent.<\/li>\n<\/ul>\n<\/li>\n<li>Quelle est la fonction de transfert [latex]H(p)=\\frac{U(p)}{I(p)}[\/latex] ? En d\u00e9duire comment choisir les param\u00e8tres constitutifs de la pince afin que [latex]u[\/latex] soit directement proportionnel \u00e0 [latex]I[\/latex].\n<ul>\n<li>Passer l&rsquo;\u00e9quation diff\u00e9rentielle en complexes.<\/li>\n<li>[latex]u[\/latex] est proportionnel \u00e0 [latex]I[\/latex] si la fonction de transfert est ind\u00e9pendante de [latex]p[\/latex].<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h5>2 &#8211; Permanent magnet<\/h6>\n<ol>\n<li>How does the hysteresis cycle needs to be for a good permanent magnet ? Should a soft or hard material be used ?\n<ul>\n<li>Le cycle d&rsquo;hyst\u00e9r\u00e9sis doit-il \u00eatre fin ou \u00e9pais ?<\/li>\n<\/ul>\n<\/li>\n<li>Show that the vector [latex]\\vec{H}[\/latex] is null in the electrical steel.\n<ul>\n<li>Relier [latex]B[\/latex] et [latex]H[\/latex] dans le mat\u00e9riau doux. Que vaut la perm\u00e9abilit\u00e9 magn\u00e9tique du mat\u00e9riau doux ?<\/li>\n<\/ul>\n<\/li>\n<li>Ascertain a relation between [latex]B_a[\/latex] and [latex]H_a[\/latex] in the magnet. Deduce graphically their value. How many solutions are their ?\n<ul>\n<li>Appliquer le th\u00e9or\u00e8me d&rsquo;Amp\u00e8re sur une ligne de champ moyenne.<\/li>\n<li>Montrer que le champ magn\u00e9tique est le m\u00eame dans l&rsquo;entrefer, l&rsquo;aimant permanent et le mat\u00e9riau doux.<\/li>\n<\/ul>\n<\/li>\n<li>What are [latex]B_e[\/latex] and [latex]H_e[\/latex] value in the air gap ?\n<ul><\/ul>\n<\/li>\n<\/ol>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>T\u00e9l\u00e9chargements T\u00e9l\u00e9charger le polycopi\u00e9 T\u00e9l\u00e9charger le fichier Anki Devoirs \u00e0 la maison DM 1 DM 2 Coups de pouce Laisser la souris sur le texte pour l&rsquo;afficher. 1 &#8211; Pince amp\u00e8re-m\u00e9trique D\u00e9terminer le champ [latex]\\vec{H}_I[\/latex] cr\u00e9\u00e9 dans tout l&rsquo;espace par&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/www.cpge-brizeux.fr\/wordpress\/psi\/physchim-psi-2425\/electromagnetisme-4-milieux-ferromagnetiques.html\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":26,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[400],"tags":[],"class_list":["post-34155","post","type-post","status-publish","format-standard","hentry","category-physchim-psi-2425"],"_links":{"self":[{"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/posts\/34155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=34155"}],"version-history":[{"count":1,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/posts\/34155\/revisions"}],"predecessor-version":[{"id":34186,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/posts\/34155\/revisions\/34186"}],"wp:attachment":[{"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=34155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/categories?post=34155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cpge-brizeux.fr\/wordpress\/wp-json\/wp\/v2\/tags?post=34155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}