{"id":208996,"date":"2024-03-21T14:05:20","date_gmt":"2024-03-21T14:05:20","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e4%ba%a4%e6%b5%81%e5%9b%9e%e8%b7%af%e3%81%ae%e5%b9%b3%e5%9d%87%e9%9b%bb%e5%8a%9b%e8%a8%88%e7%ae%97%e5%bc%8f-%e6%a6%82%e8%a6%81%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-05-17T15:05:25","modified_gmt":"2024-05-17T15:05:25","slug":"%e4%ba%a4%e6%b5%81%e5%9b%9e%e8%b7%af%e3%81%ae%e5%b9%b3%e5%9d%87%e9%9b%bb%e5%8a%9b%e8%a8%88%e7%ae%97%e5%bc%8f-%e6%a6%82%e8%a6%81%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e4%ba%a4%e6%b5%81%e5%9b%9e%e8%b7%af%e3%81%ae%e5%b9%b3%e5%9d%87%e9%9b%bb%e5%8a%9b%e8%a8%88%e7%ae%97%e5%bc%8f-%e6%a6%82%e8%a6%81%e3%81%a8%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f | \u6982\u8981\u3068\u4f7f\u3044\u65b9"},"content":{"rendered":"<p class=\"sidekick\">\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f\u306e\u6982\u8981\u3068\u4f7f\u3044\u65b9\u3092\u89e3\u8aac\u3002\u5e73\u5747\u96fb\u529b\u3068\u306f\u4f55\u304b\u3001\u305d\u306e\u8a08\u7b97\u65b9\u6cd5\u3068\u5b9f\u52b9\u5024\u3092\u7528\u3044\u305f\u5177\u4f53\u7684\u306a\u8a08\u7b97\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h2>\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f | \u6982\u8981\u3068\u4f7f\u3044\u65b9<\/h2>\n<p>\u96fb\u6c17\u5de5\u5b66\u306b\u304a\u3044\u3066\u3001\u4ea4\u6d41 (AC) \u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u5e73\u5747\u96fb\u529b\u306f\u3001\u3042\u308b\u671f\u9593\u306b\u304a\u3051\u308b\u96fb\u529b\u306e\u5e73\u5747\u7684\u306a\u5024\u3092\u793a\u3057\u3001\u5b9f\u969b\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u6d88\u8cbb\u91cf\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f\u306e\u6982\u8981\u3068\u305d\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u4ea4\u6d41\u56de\u8def\u306e\u57fa\u672c<\/h3>\n<p>\u307e\u305a\u3001\u4ea4\u6d41 (AC) \u3068\u306f\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u5468\u671f\u7684\u306b\u5909\u5316\u3059\u308b\u96fb\u6d41\u3084\u96fb\u5727\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002\u5bb6\u5ead\u7528\u96fb\u6e90\u3084\u5de5\u5834\u306a\u3069\u3067\u4f7f\u308f\u308c\u308b\u96fb\u529b\u306f\u307b\u3068\u3093\u3069\u304c\u4ea4\u6d41\u96fb\u6d41\u3067\u3059\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u76f4\u6d41 (DC) \u306f\u4e00\u5b9a\u306e\u96fb\u6d41\u304c\u6d41\u308c\u7d9a\u3051\u308b\u5f62\u5f0f\u3067\u3059\u3002<\/p>\n<h3>\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u3068\u306f?<\/h3>\n<p>\u5e73\u5747\u96fb\u529b\u306f\u3001\u3042\u308b\u4e00\u5b9a\u671f\u9593\u306b\u308f\u305f\u3063\u3066\u6d88\u8cbb\u3055\u308c\u308b\u96fb\u529b\u306e\u5e73\u5747\u5024\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u4f8b\u3048\u3070\u5bb6\u5ead\u3084\u5de5\u696d\u6a5f\u5668\u3067\u4f7f\u7528\u3055\u308c\u308b\u96fb\u529b\u91cf\u3092\u8a55\u4fa1\u3059\u308b\u305f\u3081\u306b\u91cd\u8981\u306a\u6307\u6a19\u3067\u3059\u3002\u4ea4\u6d41\u56de\u8def\u3067\u306f\u96fb\u5727\u3068\u96fb\u6d41\u304c\u3068\u3082\u306b\u6642\u9593\u3068\u3068\u3082\u306b\u632f\u52d5\u3059\u308b\u305f\u3081\u3001\u77ac\u9593\u7684\u306a\u96fb\u529b\u306f\u6642\u9593\u3054\u3068\u306b\u5909\u5316\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5e73\u5747\u96fb\u529b\u3092\u6c42\u3081\u308b\u3053\u3068\u3067\u5b9f\u969b\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u6d88\u8cbb\u3092\u3088\u308a\u6b63\u78ba\u306b\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f<\/h3>\n<p>\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b \\( P_{avg} \\) \u306f\u3001\u4ee5\u4e0b\u306e\u5f0f\u3067\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[ P_{avg} = \\frac{1}{T} \\int_0^T v(t) \\cdot i(t) \\, dt \\]<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li>\\( T \\) \u306f\u5468\u671f\u3067\u3059\u3002<\/li>\n<li>\\( v(t) \\) \u306f\u6642\u523b \\( t \\) \u306b\u304a\u3051\u308b\u96fb\u5727\u3067\u3059\u3002<\/li>\n<li>\\( i(t) \\) \u306f\u6642\u523b \\( t \\) \u306b\u304a\u3051\u308b\u96fb\u6d41\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u7a4d\u5206\u306f\u30011\u5468\u671f\u306b\u308f\u305f\u3063\u3066\u306e\u300c\u77ac\u9593\u96fb\u529b\u300d \\( v(t) \\cdot i(t) \\) \u3092\u8a08\u7b97\u3057\u3001\u305d\u306e\u5e73\u5747\u5024\u3092\u6c42\u3081\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<h3>\u6709\u52b9\u96fb\u529b (\u5b9f\u52b9\u5024) \u3068\u5e73\u5747\u96fb\u529b\u306e\u95a2\u4fc2<\/h3>\n<p>\u4ea4\u6d41\u96fb\u5727\u3068\u96fb\u6d41\u306e\u5b9f\u52b9\u5024 \\( V_{rms} \\) \u3068 \\( I_{rms} \\) \u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u5e73\u5747\u96fb\u529b\u3092\u6b21\u306e\u5f0f\u3067\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n<p>\\[ P_{avg} = V_{rms} \\times I_{rms} \\times \\cos \\phi \\]<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li>\\( V_{rms} \\) \u306f\u96fb\u5727\u306e\u5b9f\u52b9\u5024 (Root Mean Square) \u3067\u3059\u3002<\/li>\n<li>\\( I_{rms} \\) \u306f\u96fb\u6d41\u306e\u5b9f\u52b9\u5024 (Root Mean Square) \u3067\u3059\u3002<\/li>\n<li>\\( \\cos \\phi \\) \u306f\u529b\u7387 (Power Factor) \u3067\u3042\u308a\u3001\u96fb\u5727\u3068\u96fb\u6d41\u306e\u4f4d\u76f8\u5dee \\( \\phi \\) \u306e\u4f59\u5f26\u3067\u3059\u3002<\/li>\n<\/ul>\n<h3>\u8a08\u7b97\u306e\u4f8b<\/h3>\n<p>\u4f8b\u3048\u3070\u3001\u5b9f\u52b9\u5024\u304c \\( V_{rms} = 230 \\text{V} \\) \u3001 \\( I_{rms} = 5 \\text{A} \\) \u3067\u3001\u529b\u7387\u304c0.8\u306e\u5834\u5408\u3001\u5e73\u5747\u96fb\u529b \\( P_{avg} \\) \u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[ P_{avg} = 230 \\times 5 \\times 0.8 = 920 \\text{W} \\]<\/p>\n<h3>\u307e\u3068\u3081<\/h3>\n<p>\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u306f\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u6d88\u8cbb\u3092\u8a55\u4fa1\u3057\u3001\u52b9\u7387\u7684\u306a\u96fb\u529b\u7ba1\u7406\u3092\u884c\u3046\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u8a08\u7b97\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u96fb\u6c17\u5de5\u5b66\u306e\u4ed6\u306e\u5fdc\u7528\u306b\u5bfe\u3057\u3066\u3082\u3088\u308a\u6df1\u3044\u7406\u89e3\u304c\u5f97\u3089\u308c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ea4\u6d41\u56de\u8def\u306e\u5e73\u5747\u96fb\u529b\u8a08\u7b97\u5f0f\u306e\u6982\u8981\u3068\u4f7f\u3044\u65b9\u3092\u89e3\u8aac\u3002\u5e73\u5747\u96fb\u529b\u3068\u306f\u4f55\u304b\u3001\u305d\u306e\u8a08\u7b97\u65b9\u6cd5\u3068\u5b9f\u52b9\u5024\u3092\u7528\u3044\u305f\u5177\u4f53\u7684\u306a\u8a08\u7b97\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[96],"tags":[97],"class_list":["post-208996","post","type-post","status-publish","format-standard","hentry","category-96","tag-97","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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