四千瓦三相电机需多大铜线 380V4Kw电动机用多大的电线
44\u5343\u74e6\u7535\u673a380v\u7528\u591a\u5927\u7684\u94dc\u7ebf4KW\u4e09\u76f8\u7535\u673a380V\u9700\u89811\u5e73\u65b9\u622a\u9762\u79ef\u7684\u7535\u6e90\u7ebf\u3002\u3000\u3000\u7535\u6d41\u4e3aI=P/(1.732Ucos\u03c6)=4/(1.732x0.38x0.85)=7.2A\uff08\u7528\u6807\u51c6\u4e09\u76f8\u5e02\u7535\u8ba1\u7b97\uff0ccos\u03c6\u662f\u8d1f\u8f7d\u529f\u7387\u56e0\u6570\uff0c\u4e00\u822c\u7535\u673a\u53d60.85\uff09\u3002\u3000\u3000\u5728\u5c0f\u7535\u6d41\u6761\u4ef6\u4e0b\uff0c\u94dd\u7535\u7f06\u7684\u6bcf\u5e73\u65b9\u7684\u5b89\u5168\u8f7d\u6d41\u91cf\u63099A\u8ba1\u7b97\uff0c\u56e0\u6b64\uff0c\u94dd\u7ebf\u7684\u5e73\u65b9\u6570\u4e3a7.2/9=0.8\u5e73\u65b9\u3002\u3000\u3000\u7535\u7f06\u7684\u89c4\u683c\u4e00\u822c\u4e3a\uff08\u6309\u622a\u9762\u5e73\u65b9\u6570\u5206\uff0c\u5355\u4f4d\u5e73\u65b9\u6beb\u7c73\uff09\uff1a1\u30011.5\u30012.5\u30014\u30016\u300110\u300116\u300125\u300135\u300150\u300170\u300195\u3001120\u3001150\u3001185\u3001240\u7b49\u3002\u56e0\u6b64\u9009\u94dd\u7ebf\u8981\u90091\u5e73\u65b9\u3002\u3000\u3000\u94dd\u7535\u7f06\u7684\u6bcf\u5e73\u65b9\u7684\u5b89\u5168\u8f7d\u6d41\u91cf\u53e3\u8bc0\u4e3a\uff1a\u201c\u4e8c\u70b9\u4e94\u4e0b\u4e58\u4ee5\u4e5d\uff0c\u5f80\u4e0a\u51cf\u4e00\u987a\u53f7\u8d70\u201d\u8bf4\u7684\u662f2.5\u5e73\u65b9\u53ca\u4ee5\u4e0b\u7684\u5404\u79cd\u622a\u9762\u94dd\u82af\u7edd\u7f18\u7ebf\uff0c\u5176\u8f7d\u6d41\u91cf\u7ea6\u4e3a\u622a\u9762\u6570\u76849\u500d\u3002\u59822.5\u5e73\u65b9\u5bfc\u7ebf\uff0c\u8f7d\u6d41\u91cf\u4e3a2.5\u00d79=22.5(A)\u3002\u4ece4\u5e73\u65b9\u53ca\u4ee5\u4e0a\u5bfc\u7ebf\u7684\u8f7d\u6d41\u91cf\u548c\u622a\u9762\u6570\u7684\u500d\u6570\u5173\u7cfb\u662f\u987a\u7740\u7ebf\u53f7\u5f80\u4e0a\u6392\uff0c\u500d\u6570\u9010\u6b21\u51cfl\uff0c\u53734\u00d78\u30016\u00d77\u300110\u00d76\u300116\u00d75\u300125\u00d74\u3002
\u9700\u89811.5\u5e73\u65b9\u7684\u7535\u7f06\u7ebf\u3002
\uff081\uff09\u8ba1\u7b97\u65b9\u6cd5\uff1a
\u6839\u636e\u4e09\u76f8\u7535\u76f8\u7ebf\u7535\u6d41\u8ba1\u7b97\u516c\u5f0f I=P\u00f7(U\u00d71.732\u00d7cos\u03a6)
P-\u529f\u7387(W);U-\u7535\u538b(380V);cos\u03a6-\u529f\u7387\u56e0\u7d20(0.85);I-\u76f8\u7ebf\u7535\u6d41(A)
\u5e26\u5165\u6570\u636eP=4kw\uff0cU=380V \uff1b
\u8ba1\u7b97\u5f97\uff0c\u76f8\u7ebf\u7535\u6d41I=7.14A
\uff082\uff09\u5728\u4e09\u76f8\u5e73\u8861\u7535\u8def\uff0c\u4e00\u822c\u94dc\u5bfc\u7ebf\u7684\u5b89\u5168\u8f7d\u6d41\u91cf\u4e3a5~8A/mm^2\u3002
7.17\u00f78=0.89mm^2\uff0c\u7535\u7f06\u6700\u8fd1\u7684\u89c4\u683c\u4e3a1.5mm^2
\u6269\u5c55\u8d44\u6599\uff1a
\u7535\u7f06\u7ebf\u9009\u8d2d\u8981\u70b9
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\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u4e09\u76f8\u4ea4\u6d41\u7535\u8def
四千瓦三相电机额定电流8A左右，用1.5平方铜芯线即可。
用0.83的双.线最好
绛旓細鍥涘崈鐡鐨涓夌浉鐢鐢靛姩鏈锛屼娇鐢1.5骞虫柟鐨閾滆姱绾灏辫冻澶熶簡銆傚彲浠ョ洿鎺ラ氳繃绌哄紑鎺у埗銆
绛旓細涓夌浉4鍗冪摝鐢垫満棰濆畾鐢垫祦涓嶈冻10A锛屽鐜涓嶅緢鎭跺姡鐢4脳1.5mm²鐨勯摐鑺姢濂楃嚎瓒崇煟銆傚鏈夊繀瑕佺敤鐢电紗鍙夊叾鏈灏忚鏍硷細3脳4+1脳2.5mm²銆傞夌數缂嗕笉鐢ㄧ畻锛屽湪鐢垫満鐨勯摥鐗屼笂鍙煡寰楃數鏈虹殑棰濆畾鐢垫祦锛屼互姝ゆ暟鎹鐓х數缂嗙殑杞芥祦閲忚〃灏卞彲纭畾鎵鐢ㄧ數缂嗙殑瑙勬牸銆
绛旓細鍝緱鐪嬩綘鏄嚑鏋佺殑鐢垫満浜嗐傛瀬鏁颁笉涓鏍凤紝杞熶篃涓嶄竴鏍枫傝繕鏈変粈涔堢嚎閲嶏紝绾垮緞锛岀數娴侊紝缁曟硶閮戒笉涓鏍凤紝鎵浠ョ嚎閲嶄篃灏变笉涓鏍蜂簡銆俌绯诲垪鐢垫満锛4鏋佺殑涓3.7鍏枻锛6鏋佺殑涓4鍏枻锛8鏋佺殑涓6.3鍏枻銆
绛旓細杩欎釜褰撶劧鏄鐢ㄤ笁鐩鐢电殑锛岃绠楃數娴佺害7.6A锛屽彲浠ョ敤1.5骞虫柟閾滅嚎
绛旓細4KW涓夌浉鐢垫満380V闇瑕1骞虫柟鎴潰绉殑鐢垫簮绾裤傜數娴佷负I=P/(1.732Ucos蠁)=4/(1.732x0.38x0.85)=7.2A锛鐢鏍噝hi鍑嗕笁鐩稿競鐢佃绠楋紝cos蠁鏄礋杞藉姛鐜囧洜鏁帮紝涓鑸數鏈哄彇0.85 锛夈傚湪灏忕數娴佹潯浠朵笅锛岄摑鐢电紗鐨勬瘡骞虫柟鐨勫畨鍏ㄨ浇娴侀噺鎸9A璁＄畻锛屽洜姝わ紝閾濈嚎鐨勫钩鏂规暟涓7.2/9=0.8骞虫柟銆傜數缂嗙殑瑙勬牸涓鑸负锛堟寜...
绛旓細瑕鐪嬫槸涓ょ浉鐢垫満杩樻槸涓夌浉鐢垫満锛屽鏋滀袱鐩哥數鏈轰綘璇1.5鐨勫氨琛岋紝鐢垫満浼拌杞兘涓嶄細杞傘傘備袱鐩鍥涘崈鐡鐢垫満鐞嗚涓婂洓骞虫柟鐨勭嚎灏卞彲浠ワ紝浣嗘槸涓嶉傚悎闀胯窛绂诲拰閲嶈礋鏍搁暱鏈熶娇鐢紝鎵浠ユ垜寤鸿鍏钩鏂规渶鍚堥傦紒锛
绛旓細鎴戞槸閰嶇數鍘傚鐨,浣犲彲宸叉晠杩欐牱璁＄畻鍔熺巼1鍗冪摝2涓數娴,涓骞虫柟閾滃績鐢电嚎5涓數娴.涔熷氨鏄4鍗冪摝鐨鐢垫満瑕2.5骞虫柟鐨勭嚎涓嶈繃,鎶鏈姹備竴娆＄嚎涓嶅緱浣庝簬4骞虫柟.浣犻4骞虫柟浠ヤ笂鐨勯兘琛.
绛旓細鎮ㄥソ锛氬鏋滄寜鐐瑰嚮鐢垫祦璁＄畻锛屽鏋380V鐢垫満锛岀數娴佸湪9A宸﹀彸锛屽鏋220V鐢垫満锛岀數娴佸湪18A宸﹀彸銆傛墍浠ョ數娴佸苟涓嶆槸寰堝ぇ銆380V鐢垫満1.5浠ヤ笂灏卞彲浠ヤ簡锛屼絾鏄偍鐨勭嚎璺瘮杈冮暱锛岃冭檻鍒扮嚎璺帇闄嶅拰瀵肩嚎寮哄害锛屾渶灏戝簲璇ラ夌敤2.5骞虫柟閾滅嚎銆
绛旓細380V鎺4骞虫柟閾滅嚎鑳藉甫4涓鍗冪摝銆傛牴鎹绾胯浇娴侀噺锛4骞虫柟姣背鐨閾滃绾杞芥祦閲忓湪锛25A-32A銆傛牴鎹涓夌浉鍥绾垮埗鍔熺巼璁＄畻鍏紡锛歅=鈭3UIcosb锛坈osb涓哄姛鐜囧洜鏁帮紝涓鑸彇鍊0.85锛塒=1.732脳380脳25脳0.85=13985.9锛堢摝锛=13.986锛堝崈鐡︼級
绛旓細4骞虫柟灏辫冻澶熶簡锛屽綋鐒朵竴瀹瑕鏄閾滅嚎锛
