直流电阻在不同温度的电阻怎么计算，看看下面！ 直流电阻和20℃电阻率的单位及计算公式

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1)\u5b9a\u4e49\u6216\u89e3\u91ca

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(2)\u5355\u4f4d

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(3)\u8bf4\u660e

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\u6750\u6599\u7535\u963b\u7387(\u03a9 m)
(1)\u94f6 1.6 \u00d7 10-8 (5)\u94c2 1.0 \u00d7 10-7 (9)\u5eb7\u94dc 5.0 \u00d7 10-7
(2)\u94dc 1.7 \u00d7 10-8 (6) \u94c1 1.0 \u00d7 10-7 (10)\u954d\u94ec\u5408\u91d1 1.0 \u00d7 10-6
(3)\u94dd 2.9 \u00d7 10-8 (7)\u6c5e 9.6 \u00d7 10-7 (11)\u94c1\u94ec\u94dd\u5408\u91d11.4 \u00d7 10-6
(4)\u94a8 5.3 \u00d7 10-8 (8)\u9530\u94dc 4.4 \u00d7 10-7 (12) \u94dd\u954d\u94c1\u5408\u91d11.6 \u00d7 10-6
(13)\u77f3\u58a8(8\uff5e13)\u00d710-6
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(semiconductors).

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\u53c2\u8003\u8d44\u6599\uff1ahttp://baike.baidu.com/view/42894.htm

R1/R2=(235+T1)/(235+T2),不平衡系数用换算出来的三个数，（最大值-最小值）/最小值

鐩存祦鐢甸樆鍦ㄤ笉鍚屾俯搴︾殑鐢甸樆鎬庝箞璁＄畻,鐪嬬湅涓嬮潰!
绛旓細R1/R2=(235+T1)/(235+T2),涓嶅钩琛＄郴鏁扮敤鎹㈢畻鍑烘潵鐨勪笁涓暟锛岋紙鏈澶у-鏈灏忓硷級/鏈灏忓

鐢垫満鐩存祦鐢甸樆鑳藉湪鐑佷笅娴嬮噺鍚,娓╁害澶х害鍦100搴
绛旓細褰撴俯搴︽瘡鍗囬珮1鈩冩椂锛屽浣撶數闃荤殑澧炲姞鍊间笌鍘熸潵鐢甸樆鐨勬瘮鍊硷紝鍙仛鐢甸樆娓╁害绯绘暟锛屽畠鐨勫崟浣嶆槸1浠ｏ紝鍏惰绠楀叕寮忎负锛 伪=(R2-R1)/R1(t2--t1)寮忎腑R1--娓╁害涓簍1鏃剁殑鐢甸樆鍊锛屛╋紱R2--娓╁害涓簍2鏃剁殑鐢甸樆鍊硷紝惟銆傛牴鎹互涓婂叕寮忥紝鍙互璁叉俯搴﹀ぇ绾﹀湪100搴︽椂娴嬮噺鐢垫満鐩存祦鐢甸樆鏄紝浣嗘祴閲忕數鏈虹洿娴佺數闃荤洰鐨勬槸浠涔堣鏄...

鐩存祦鐢甸樆鍦75搴﹀拰27搴︽椂鎬庝箞鎹㈢畻?
绛旓細婊炵暀鐢甸樆鍦75搴﹀拰27搴︾殑鏃跺欑殑鎹㈢畻瑙勫緥锛灏辨槸75搴︾殑鐢甸樆蹇呴』瑕佷箻浠3%鐨勭數婧愭崯鑰楋紝鍐嶅姞涓7%鐨勭數闃荤殑杞崲鐜囷紝杩欐牱灏卞彲浠ュ緱鍒27搴︾殑鐢甸樆浜銆

鐩存祦鐢甸樆鍜20鈩冪數闃荤巼鐨勫崟浣嶅強璁＄畻鍏紡
绛旓細鈶犵數闃荤巼蟻涓嶄粎鍜屽浣撶殑鏉愭枡鏈夊叧锛岃繕鍜屽浣撶殑娓╁害鏈夊叧銆鍦ㄦ俯搴鍙樺寲涓嶅ぇ鐨勮寖鍥村唴锛岋細鍑犱箮鎵鏈夐噾灞鐨勭數闃鐜囬殢娓╁害浣滅嚎鎬у彉鍖栵紝鍗诚=蟻o(1+at)銆傚紡涓璽鏄憚姘忔俯搴︼紝蟻o鏄疧鈩冩椂鐨勭數闃荤巼锛宎鏄數闃荤巼娓╁害绯绘暟銆傗憽鐢变簬鐢甸樆鐜囬殢娓╁害鏀瑰彉鑰屾敼鍙橈紝鎵浠ュ浜庢煇浜涚數鍣ㄧ殑鐢甸樆锛屽繀椤昏鏄庡畠浠墍澶勭殑鐗╃悊鐘舵併傚涓...

璇烽棶鍚勪綅甯堝倕,鐢靛姏鍙樺帇鍣ㄧ殑鐩存祦鐢甸樆濡傛灉鍒嗗埆瑕佹姌绠楀埌鎽勬皬浜屽崄搴﹀拰涓冨崄浜...
绛旓細閾滅嚎 20搴︼細R20=R*(20+235)/(t+235)75搴: R75=R*(75+235)/(t+235)閾濈嚎 20搴: R20=R*(20+225)/(t+225)75搴: R75=R*(75+225)/(t+225)t涓烘祴閲忔椂鐨娓╁害锛孯涓烘祴寰鐨勭數闃鍊笺

鐩存祦鐢甸樆鎬庝箞娴嬮噺
绛旓細棣栧厛灏嗙數鏈哄湪瀹ゅ唴鏀剧疆涓娈垫椂闂达紝鐢ㄦ俯搴﹁娴嬮噺鐢靛姩鏈虹粫缁勭閮ㄦ垨閾佸績鐨勬俯搴︺傛鏃舵墍娴嬫俯搴﹀嵆涓哄疄闄呭喎鐘舵佷笅缁曠粍鐨勬俯搴︺傝嫢缁曠粍绔儴鎴栭搧蹇冪殑娓╁害鏃犳硶娴嬮噺鏃讹紝鍏佽鐢ㄦ満澹崇殑娓╁害浠ｆ浛銆傚澶с佷腑鍨嬬數鏈猴紝娓╁害璁＄殑鏀剧疆鏃堕棿搴斾笉灏戜簬15min 銆傜粫缁勭殑鐩存祦鐢甸樆鍊兼槸鐢ㄥ弻鑷傜數妗ユ垨鍗曡噦鐢垫ˉ娴嬮噺鐨勩鐢甸樆鍦涓娆у鍙婁互涓嬫椂锛...

娴嬮噺鐩存祦鐢甸樆搴旇鐢ㄤ粈涔堟柟娉曞憿?
绛旓細涓轰繚璇佽冻澶熺簿搴︼紝鐢垫祦瑕佹湁涓瀹氱殑鏁板硷紝浣嗗張涓嶈兘瓒呰繃缁曠粍棰濆畾鐢垫祦鐨20%锛屽苟搴斿敖蹇悓鏃惰鏁帮紝浠ュ厤琚祴缁曠粍鍙戠儹褰卞搷娴嬮噺鍑嗙‘搴︺傛祴閲忓皬鐢甸樆鏃讹紝鑻ヨ冭檻鐢靛帇琛ㄧ殑鍒嗘祦鐢垫祦(璁剧數鍘嬭〃鍐呴樆涓篟v锛岀數鍘嬭〃璇绘暟涓篣锛岀數娴佽〃璇绘暟涓篒)锛岃娴嬬粫缁勭殑鐩存祦鐢甸樆涓猴細R=U/(I-U/Rv)锛涜嫢涓嶈冭檻鐢靛帇琛ㄧ殑鍒嗘祦鐢垫祦锛屽垯R=U/I...

...涓涓紗鍖呯嚎鐨鐩存祦鐢甸樆妫娴嬫柟娉,娴嬪嚭鏉鐨勭數闃诲浣鎹㈢畻鍒20鈩冪殑鐢甸樆...
绛旓細219惟鍙互閫氳繃璁＄畻鍏紡鎹㈢畻鎴愪负20鈩冧笅鐨勫浣鐢甸樆锛歊20 =2.219 / 1+0.00393锛坱 鈥 20锛=2.176 惟 鎴栬呯畝鍗曚竴鐐瑰埄鐢ㄥ叕寮忕畻鍑涓嶅悓娓╁害涓嬬殑娓╁害绯绘暟琛紝Kt=1/(1+0.00393*(t-20))鍦ㄦ俯搴︿负t鈩冩祴閲忕殑瀵间綋鐢甸樆Rt涔樹互瀵瑰簲娓╁害绯绘暟鍗冲彲鎹㈢畻鎴20鈩冧笅鐨勫浣撶數闃伙細R20 =2.219 *0.981=2.176 惟 ...

鐩存祦鐢甸樆鐨勮绠楀叕寮忔槸浠涔?
绛旓細R锛漃锛忥紙I*I锛夈傛祴鍑轰笁鐩鐨勭數闃鍊硷紙A1锛汚2锛汚3锛夛細鏁戝嚭涓夎呯殑骞冲潎鍊硷細A0=锛圓1+A2+A3锛/3锛涘啀鎷夸换涓鐩哥殑鍊硷紙A1鎴栬匒2鎴栬匒3锛変笌骞冲潎鍊糀0鐩稿噺寰楀埌鐨勫樊=B锛涘幓闄や互骞冲潎鍊糀0鍐嶉櫎浠100%,寰楀埌鐨勫糃涓嶈秴杩囥2%鍗充负鍚堟牸.C=锛圔/A0锛/100%鈮2%銆

鐩存祦鐢甸樆娴嬭瘯浠殑娴嬮噺鏂规硶鏄粈涔?
绛旓細鍦鐩存祦鐢甸樆娴嬭瘯浠殑娴嬮噺杩囩▼涓紝闄や簡涓ユ牸閬靛畧鐢垫皵瀹夊叏瑙勭▼鍜岃澶囧疄楠岃绋嬪锛岃繕搴旂壒鍒敞鎰:1銆佸湪绾垮湀娓╁害绋冲畾鐨勬儏鍐典笅娴嬮噺锛屽彉鍘嬪櫒娌圭鐨勪笂涓嬫俯搴︿箣宸笉寰楄秴杩3鈩冿紱2.鐢变簬鍙樺帇鍣ㄧ嚎鍦堟湁鐢垫劅锛屾祴閲忔椂鍏呯數鐢垫祦涓嶇ǔ瀹氾紝蹇呴』绛夌數娴佺ǔ瀹氬悗鍐嶈鏁般傚鏈夊繀瑕侊紝搴旂缉鐭厖鐢垫椂闂达紱3.灏介噺闄嶄綆瀹為獙鐢佃矾涓绾跨殑鎺ヨЕ鐢甸樆銆

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