380伏电压怎么计算电流啊?电机是18.5千瓦?是用功率除以电压吗? 知道380V电压,怎么算电流和功率?
\u4e00\u4e2a\u7535\u673a\u989d\u5b9a\u529f\u7387\u4e3a18.5kw,\u9891\u738750Hz,\u7535\u538b380v,\u5f53\u7535\u6d41\u4e3a30A\u65f6\uff0c\u5176\u5b9e\u9645\u7528\u7535\u91cf\u662f\u591a\u5c11\uff0c\u600e\u4e48\u7b97\uff1f\u5f53\u7535\u6d41\u4e3a30A\u65f6\uff0c\u5176\u5b9e\u9645\u7528\u7535\u91cf\u662f:P=1.732*0.38*30*0.8=15.8KW
\u5f53\u7535\u6d41\u4e3a80A\u65f6\uff0c\u5176\u5b9e\u9645\u7528\u7535\u91cf\u662f:P=1.732*0.38*80*0.8=42KW
\u3000\u3000\u4e3e\u4f8b\u8bf4\u660e\uff1a15KW\u7535\u52a8\u673a380V\u3002\u5f53\u7528\u7535\u7535\u538b\u4e3a380V\u65f6\uff1aP=UICOS\u03c6/1.72\uff0c \u6b64\u65f6\u7535\u6d41\u4e3a\uff1aI=15KW/380V/0.83(COS\u03c6,\u529f\u7387\u56e0\u6570/1.72x1000=27.7A.(\u7ebf\u7535\u6d41\uff09\u3002
\u3000\u3000\u4ea4\u6d41\u7535\u6d41\u4e0e\u529f\u7387\u7684\u5173\u7cfb\uff1a
\u3000\u3000\u5355\u76f8\uff1aI=P/220\uff1b \u4e09\u76f8\uff1aI=P/1.73\u00d7380\u3002
\u3000\u3000\u76f4\u6d41\u7535\u529f\u7387\uff1aP=U*I
\u3000\u3000 =I²R
\u3000\u3000 =U²/R\u3002
如果是单相电用功率除以电压,再除以功率因素。
如果是三相电,还要再除以根号3。因此18.5千瓦的三相电机电流大约接近40A。
电流=功率÷线电压÷1.732÷功率因数
本例中,功率因数按照0.8考虑,
电流=18500÷380÷1.732÷0.8=35A
绛旓細380浼忓姩鍔涜澶囷紝鐢垫祦I=棰濆畾鍔熺巼P/鏍瑰彿3涔樹互绾跨數鍘婾涔樹互鍔熺巼鍥犳暟COS鐩镐篃灏辨槸鐢垫祦锛濆姛鐜/380/鏍瑰彿3銆備妇渚嬭鏄庯細15KW鐢靛姩鏈380V銆傚綋鐢ㄧ數鐢靛帇涓380V鏃讹細P=UICOS蠁/1.72锛 姝ゆ椂鐢垫祦涓猴細I=15KW/380V/0.83(COS蠁,鍔熺巼鍥犳暟/1.72x1000=27.7A.(绾跨數娴侊級銆備氦娴佺數娴佷笌鍔熺巼鐨勫叧绯伙細鍗曠浉锛欼=P/220锛 ...
绛旓細380V鐢垫祦璁$畻鏂规硶锛380V鐢靛姩鏈猴紙涓夌浉绌鸿皟鍘嬬缉鏈猴級鐨勭數娴佽绠楀叕寮忎负锛I锛 棰濆畾鍔熺巼 梅 锛1.732 脳 棰濆畾鐢靛帇 脳 鍔熺巼鍥犳暟 脳 鏁堢巼 锛銆傚10鍗冪摝鐢垫満鍔熺巼鍥犳暟鏄0.95锛岄偅涔圛 = 10000 / 1.732 X 380 X 0.95 = 16A銆傚姛鐜囧洜鏁版槸鐢靛姏绯荤粺鐨勪竴涓噸瑕佺殑鎶鏈暟鎹傚姛鐜囧洜鏁版槸琛¢噺鐢垫皵璁惧鏁堢巼楂樹綆鐨勪竴...
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