{"id":1494,"date":"2026-10-26T23:00:00","date_gmt":"2026-10-26T14:00:00","guid":{"rendered":"https:\/\/quantumsea.net\/?p=1494"},"modified":"2026-10-23T23:18:28","modified_gmt":"2026-10-23T14:18:28","slug":"qs-skin-effect-current-depth-20261023","status":"publish","type":"post","link":"https:\/\/quantumsea.net\/?p=1494","title":{"rendered":"\u8868\u76ae\u52b9\u679c\u3001\u5468\u6ce2\u6570\u304c\u9ad8\u3044\u307b\u3069\u96fb\u6d41\u304c\u8868\u9762\u306b\u96c6\u307e\u308b\u7406\u7531"},"content":{"rendered":"<p>\u91d1\u5c5e\u7dda\u3092\u592a\u304f\u3059\u308c\u3070\u3001\u96fb\u6d41\u306e\u901a\u308a\u9053\u304c\u5e83\u304c\u308a\u3001\u62b5\u6297\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4ea4\u6d41\u306e\u5468\u6ce2\u6570\u304c\u9ad8\u304f\u306a\u308b\u3068\u3001\u65ad\u9762\u5168\u4f53\u3092\u5747\u7b49\u306b\u4f7f\u3048\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u96fb\u6d41\u304c\u8868\u9762\u8fd1\u304f\u3078\u504f\u308b<strong>\u8868\u76ae\u52b9\u679c<\/strong>\u304c\u73fe\u308c\u308b\u304b\u3089\u3067\u3059\u3002\u5c0e\u4f53\u306e\u592a\u3055\u3092\u8003\u3048\u308b\u3068\u304d\u306b\u306f\u3001\u5916\u5f62\u3060\u3051\u3067\u306a\u304f\u3001\u96fb\u6d41\u304c\u3069\u306e\u304f\u3089\u3044\u306e\u6df1\u3055\u307e\u3067\u5206\u5e03\u3059\u308b\u304b\u3082\u898b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<section class=\"influvetor-quick-summary\">\n<p><strong>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f<\/strong><\/p>\n<ul>\n<li>\u4ea4\u6d41\u304c\u4f5c\u308b\u5909\u52d5\u78c1\u5834\u3068\u8a98\u5c0e\u96fb\u5834\u306e\u4f5c\u7528\u3067\u3001\u96fb\u6d41\u5bc6\u5ea6\u306f\u5c0e\u4f53\u306e\u8868\u9762\u8fd1\u304f\u307b\u3069\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u8868\u76ae\u6df1\u3055\u306f\u96fb\u6d41\u306e\u632f\u5e45\u304c\u8868\u9762\u306e\u7d0437%\u306b\u306a\u308b\u6df1\u3055\u3067\u3059\u3002\u305d\u3053\u304b\u3089\u5148\u304c\u6025\u306b\u6d41\u308c\u306a\u304f\u306a\u308b\u5883\u754c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>\u540c\u3058\u6750\u6599\u6761\u4ef6\u306a\u3089\u3001\u5468\u6ce2\u6570\u3092100\u500d\u306b\u3059\u308b\u3068\u8868\u76ae\u6df1\u3055\u306f10\u5206\u306e1\u306b\u306a\u308a\u307e\u3059\u3002\u5c0e\u4f53\u306e\u534a\u5f84\u3084\u539a\u3055\u3068\u6bd4\u3079\u308b\u3053\u3068\u304c\u8a2d\u8a08\u306e\u51fa\u767a\u70b9\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/section>\n<h2>\u4ea4\u6d41\u3067\u306f\u3001\u96fb\u6d41\u304c\u4f5c\u308b\u78c1\u5834\u3082\u5909\u5316\u3059\u308b<\/h2>\n<p>\u96fb\u6d41\u306e\u5468\u56f2\u306b\u306f\u78c1\u5834\u304c\u751f\u307e\u308c\u307e\u3059\u3002\u4ea4\u6d41\u3067\u306f\u96fb\u6d41\u306e\u5411\u304d\u3068\u5927\u304d\u3055\u304c\u7e70\u308a\u8fd4\u3057\u5909\u308f\u308b\u305f\u3081\u3001\u78c1\u5834\u3082\u5909\u5316\u3057\u307e\u3059\u3002\u305d\u306e\u5909\u5316\u306f\u3001\u5909\u5316\u3092\u59a8\u3052\u308b\u5411\u304d\u306e\u96fb\u5834\u3092\u5c0e\u4f53\u5185\u306b\u8a98\u5c0e\u3057\u307e\u3059\u3002\u96fb\u6d41\u3092\u6d41\u3059\u96fb\u5834\u3068\u3001\u3053\u306e\u8a98\u5c0e\u96fb\u5834\u3092\u5408\u308f\u305b\u3066\u8003\u3048\u308b\u3068\u3001\u5c0e\u4f53\u306e\u5965\u307e\u3067\u540c\u3058\u3088\u3046\u306b\u96fb\u6d41\u304c\u6d41\u308c\u308b\u5206\u5e03\u3067\u306f\u306a\u304f\u3001\u8868\u9762\u304b\u3089\u5185\u5074\u3078\u5f31\u307e\u308b\u5206\u5e03\u306b\u306a\u308a\u307e\u3059\u3002\u5468\u6ce2\u6570\u304c\u9ad8\u3044\u307b\u3069\u3001\u3053\u306e\u504f\u308a\u304c\u6d45\u3044\u7bc4\u56f2\u306b\u96c6\u4e2d\u3057\u307e\u3059\u3002\uff3b1\uff3d<\/p>\n<p>\u3053\u308c\u306f\u3001\u96fb\u5b50\u304c\u5916\u5411\u304d\u306b\u62bc\u3057\u51fa\u3055\u308c\u3066\u4e2d\u5fc3\u304c\u7a7a\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3069\u3053\u3067\u3069\u308c\u3060\u3051\u306e<strong>\u96fb\u6d41\u5bc6\u5ea6<\/strong>\u304c\u751f\u3058\u308b\u304b\u306e\u9055\u3044\u3067\u3059\u3002\u96fb\u6d41\u5bc6\u5ea6\u306f\u3001\u5358\u4f4d\u65ad\u9762\u7a4d\u3042\u305f\u308a\u306b\u6d41\u308c\u308b\u96fb\u6d41\u3092\u8868\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u5965\u306e\u96fb\u6d41\u306f\u632f\u5e45\u304c\u5c0f\u3055\u304f\u306a\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u8868\u9762\u306e\u96fb\u6d41\u3068\u306e\u4f4d\u76f8\u3082\u305a\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u6bd4\u8f03\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u3001\u6642\u9593\u3068\u3068\u3082\u306b\u632f\u52d5\u3059\u308b\u96fb\u6d41\u5bc6\u5ea6\u306e\u300c\u632f\u5e45\u300d\u3092\u6271\u3044\u307e\u3059\u3002<\/p>\n<h2>\u8868\u76ae\u6df1\u3055\u306f\u300c\u6d41\u308c\u308b\u30fb\u6d41\u308c\u306a\u3044\u300d\u306e\u5883\u76ee\u3067\u306f\u306a\u3044<\/h2>\n<p>\u5747\u8cea\u306a\u826f\u5c0e\u4f53\u304c\u8868\u9762\u304b\u3089\u5341\u5206\u6df1\u304f\u307e\u3067\u7d9a\u304f\u30e2\u30c7\u30eb\u3067\u306f\u3001\u6df1\u3055x\u3067\u306e\u96fb\u6d41\u5bc6\u5ea6\u306e\u632f\u5e45\u306f\u3001\u8868\u9762\u30921\u3068\u3057\u3066<strong>exp(\u2212x\/\u03b4)<\/strong>\u306b\u6bd4\u4f8b\u3057\u3066\u6e1b\u5c11\u3057\u307e\u3059\u3002\u3053\u306e\u03b4\u304c<strong>\u8868\u76ae\u6df1\u3055<\/strong>\u3067\u3059\u3002x\uff1d\u03b4\u3067\u306f\u7d040.368\u30012\u03b4\u3067\u306f\u7d040.135\u30013\u03b4\u3067\u306f\u7d040.050\u306b\u306a\u308a\u307e\u3059\u3002\u306a\u3060\u3089\u304b\u306b\u6e1b\u308b\u306e\u3067\u3001\u03b4\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u306b\u3082\u96fb\u6d41\u306f\u3042\u308a\u307e\u3059\u3002\uff3b1\u30012\uff3d<\/p>\n<p>\u3053\u3053\u3067\u3001\u632f\u5e45\u3068\u767a\u71b1\u3092\u6df7\u540c\u3057\u306a\u3044\u3053\u3068\u3082\u5927\u5207\u3067\u3059\u3002\u540c\u3058\u5c0e\u96fb\u7387\u306e\u6750\u6599\u3067\u3001\u3042\u308b\u5834\u6240\u306e\u6642\u9593\u5e73\u5747\u306e\u30b8\u30e5\u30fc\u30eb\u767a\u71b1\u5bc6\u5ea6\u306f\u96fb\u6d41\u5bc6\u5ea6\u632f\u5e45\u306e2\u4e57\u306b\u6bd4\u4f8b\u3057\u307e\u3059\u3002\u3053\u306e\u30e2\u30c7\u30eb\u306e\u03b4\u306e\u4f4d\u7f6e\u3067\u306f\u3001\u632f\u5e45\u306f\u8868\u9762\u306e\u7d0437%\u3067\u3059\u304c\u3001\u5c40\u6240\u7684\u306a\u5e73\u5747\u767a\u71b1\u5bc6\u5ea6\u306f\u7d0414%\u3067\u3059\u3002\u3053\u308c\u306f\u300c\u5c0e\u4f53\u5168\u4f53\u306e\u767a\u71b1\u304c14%\u306b\u306a\u308b\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u306f\u306a\u304f\u3001\u8868\u9762\u3068\u305d\u306e\u6df1\u3055\u306b\u3042\u308b\u5834\u6240\u3092\u6bd4\u3079\u305f\u5024\u3067\u3059\u3002<\/p>\n<h2>\u5468\u6ce2\u6570\u3092100\u500d\u306b\u3059\u308b\u3068\u3001\u6df1\u3055\u306f10\u5206\u306e1<\/h2>\n<p>\u8868\u76ae\u6df1\u3055\u306f\u3001\u5468\u6ce2\u6570f\u3001\u900f\u78c1\u7387\u03bc\u3001\u5c0e\u96fb\u7387\u03c3\u3092\u7528\u3044\u3066\u3001<strong>\u03b4\uff1d1\uff0f\u221a(\u03c0f\u03bc\u03c3)<\/strong>\u3068\u8868\u305b\u307e\u3059\u3002\u900f\u78c1\u7387\u306f\u78c1\u5834\u306b\u5bfe\u3059\u308b\u6750\u6599\u306e\u5fdc\u7b54\u3001\u5c0e\u96fb\u7387\u306f\u96fb\u6d41\u306e\u6d41\u308c\u3084\u3059\u3055\u3092\u8868\u3059\u91cf\u3067\u3059\u3002\u3053\u306e\u5f0f\u306f\u3001\u4f1d\u5c0e\u96fb\u6d41\u304c\u5909\u4f4d\u96fb\u6d41\u3088\u308a\u5341\u5206\u5927\u304d\u3044\u826f\u5c0e\u4f53\u306e\u8fd1\u4f3c\u306b\u57fa\u3065\u304d\u307e\u3059\u3002\u03c3\u304c\u89d2\u5468\u6ce2\u6570\u3068\u8a98\u96fb\u7387\u306e\u7a4d\u3088\u308a\u5341\u5206\u5927\u304d\u3044\u3001\u3068\u3044\u3046\u6761\u4ef6\u3067\u3059\u3002\uff3b2\u3001\u5f0f9.2.48\uff3d<\/p>\n<p>\u72ec\u81ea\u306e\u8a08\u7b97\u4f8b\u3068\u3057\u3066\u3001\u5c0e\u96fb\u7387\u30925.0\u00d710<sup>7<\/sup> S\/m\u3001\u900f\u78c1\u7387\u30924\u03c0\u00d710<sup>\u22127<\/sup> H\/m\u306b\u56fa\u5b9a\u3057\u305f\u4eee\u60f3\u5c0e\u4f53\u3092\u8003\u3048\u307e\u3059\u3002\u5f8c\u8005\u306f\u975e\u78c1\u6027\u5c0e\u4f53\u3092\u8003\u3048\u308b\u305f\u3081\u306e\u8fd1\u4f3c\u5024\u3067\u3059\u3002\u7279\u5b9a\u306e\u88fd\u54c1\u3084\u5b9f\u6e2c\u8a66\u6599\u306e\u5024\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<div style=\"overflow-x:auto\">\n<table>\n<thead>\n<tr>\n<th>\u5468\u6ce2\u6570<\/th>\n<th>\u8a08\u7b97\u3057\u305f\u8868\u76ae\u6df1\u3055<\/th>\n<th>1 kHz\u306b\u5bfe\u3059\u308b\u6df1\u3055<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 kHz<\/td>\n<td>\u7d042.25 mm<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>100 kHz<\/td>\n<td>\u7d040.225 mm<\/td>\n<td>1\/10<\/td>\n<\/tr>\n<tr>\n<td>1 MHz<\/td>\n<td>\u7d040.0712 mm<\/td>\n<td>\u7d041\/31.6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5468\u6ce2\u6570\u306f\u5e73\u65b9\u6839\u306e\u4e2d\u306b\u5165\u308b\u305f\u3081\u3001100\u500d\u306b\u3057\u3066\u3082\u6df1\u3055\u304c100\u5206\u306e1\u306b\u306a\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002100 kHz\u304b\u30891 MHz\u3078\u306e10\u500d\u306e\u5909\u5316\u3067\u306f\u3001\u6df1\u3055\u306f\u7d043.16\u5206\u306e1\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-skin-effect-current-depth-20261023-figure-fa4001d94074.png\" alt=\"\u5341\u5206\u539a\u3044\u4eee\u60f3\u5c0e\u4f53\u3067\u306e\u96fb\u6d41\u5bc6\u5ea6\u632f\u5e45\u306e\u72ec\u81ea\u8a08\u7b97\u3002\u8868\u9762\u30921\u3068\u3059\u308b\u3068\u30011MHz\u3067\u306f100kHz\u3088\u308a\u6d45\u3044\u4f4d\u7f6e\u3067\u6e1b\u8870\u3059\u308b\u3002\u8868\u76ae\u6df1\u3055\u306f\u305d\u308c\u305e\u308c\u7d040.071mm\u30680.225mm\u3067\u3001\u305d\u3053\u3067\u632f\u5e45\u306f\u7d040.368\u306b\u306a\u308b\u3002\" style=\"max-width:100%;height:auto\"><figcaption>\u540c\u3058\u4eee\u60f3\u5c0e\u4f53\u306e\u8868\u9762\u304b\u3089\u5185\u5074\u3078\u6e2c\u3063\u305f\u3001\u96fb\u6d41\u5bc6\u5ea6\u632f\u5e45\u306e\u6e1b\u8870\u3002\u5404\u66f2\u7dda\u306e\u8868\u9762\u632f\u5e45\u30921\u306b\u305d\u308d\u3048\u305f\u72ec\u81ea\u8a08\u7b97\u3067\u3042\u308a\u3001\u540c\u3058\u7dcf\u96fb\u6d41\u3092\u6d41\u3057\u305f\u5834\u5408\u306e\u6bd4\u8f03\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u70b9\u306f\u305d\u308c\u305e\u308c\u306e\u8868\u76ae\u6df1\u3055\u3092\u793a\u3057\u307e\u3059\u3002<\/figcaption><\/figure>\n<h2>\u592a\u3055\u3092\u5897\u3084\u3059\u524d\u306b\u3001\u534a\u5f84\u3068\u8868\u76ae\u6df1\u3055\u3092\u6bd4\u3079\u308b<\/h2>\n<p>\u305f\u3068\u3048\u3070\u534a\u5f841 mm\u306e\u4e38\u7dda\u3092\u8003\u3048\u308b\u3068\u3001\u4e0a\u306e1 kHz\u306e\u8868\u76ae\u6df1\u30552.25 mm\u306f\u534a\u5f84\u3088\u308a\u5927\u304d\u3044\u5024\u3067\u3059\u3002\u3053\u3046\u3057\u305f\u6761\u4ef6\u3078\u300c\u8868\u9762\u306e\u8584\u3044\u5c64\u3060\u3051\u304c\u96fb\u6d41\u3092\u904b\u3076\u300d\u3068\u3044\u3046\u8fd1\u4f3c\u3092\u5f53\u3066\u306f\u3081\u308b\u306e\u306f\u9069\u5207\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6709\u9650\u306e\u592a\u3055\u3092\u3082\u3064\u7dda\u3067\u306f\u3001\u5186\u5f62\u306e\u5f62\u72b6\u3068\u5883\u754c\u6761\u4ef6\u3092\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u30011 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A. Haus, James R. Melcher, <a href=\"https:\/\/web.mit.edu\/6.013_book\/www\/chapter10\/10.7.html\">Electromagnetic Fields and Energy \u2014 10.7 Skin Effect<\/a>\u3002\u5f0f(5)\u3001Example 10.7.1\u3001Fig.10.7.2\u3002<\/li>\n<li>David H. Staelin, <a href=\"https:\/\/ocw.mit.edu\/courses\/6-013-electromagnetics-and-applications-spring-2009\/d3be4ea78b036a6362230fb41780cf54_MIT6_013S09_notes.pdf\">Electromagnetics and Applications<\/a>\uff08PDF\u306e\u8457\u4f5c\u6a29\u5e74\u306f2011\u5e74\u3002MIT OCW\u306eSpring 2009\u30b3\u30fc\u30b9\u3067\u516c\u958b\uff09\u3002p.271\u3001\u5f0f9.2.48\u3002\u8868\u3068\u30b0\u30e9\u30d5\u306f\u672c\u6587\u306e\u4eee\u5b9a\u306b\u57fa\u3065\u304f\u72ec\u81ea\u8a08\u7b97\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u91d1\u5c5e\u7dda\u3092\u592a\u304f\u3059\u308c\u3070\u3001\u96fb\u6d41\u306e\u901a\u308a\u9053\u304c\u5e83\u304c\u308a\u3001\u62b5\u6297\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4ea4\u6d41\u306e\u5468\u6ce2\u6570\u304c\u9ad8\u304f\u306a\u308b\u3068\u3001\u65ad\u9762\u5168\u4f53\u3092\u5747\u7b49\u306b\u4f7f\u3048\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u96fb\u6d41\u304c\u8868\u9762\u8fd1\u304f\u3078\u504f\u308b\u8868\u76ae\u52b9\u679c\u304c\u73fe\u308c\u308b\u304b\u3089\u3067\u3059\u3002\u5c0e\u4f53\u306e\u592a\u3055\u3092\u8003\u3048\u308b\u3068\u304d\u306b\u306f\u3001\u5916\u5f62\u3060\u3051\u3067 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1492,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[32],"tags":[298],"class_list":["post-1494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-semiconductors-electronics","tag-skin-effect"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-skin-effect-current-depth-20261023-featured-8361dc886a86.png","_links":{"self":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1494"}],"version-history":[{"count":1,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1494\/revisions"}],"predecessor-version":[{"id":1495,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1494\/revisions\/1495"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/media\/1492"}],"wp:attachment":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}