已知电动机额定功率为4KW，额定电压380V，启动电流为7倍，功率因数为0.8，试计算接触器、熔断器、热继电器 已知三相异步电动机额定功率为55KW，额定电压为380V，额...
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4KW\u7535\u52a8\u673a\u7684\u989d\u5b9a\u7535\u6d41\u4e00\u822c\u4e0d\u5927\u4e8e8A\uff0c\u63a5\u89e6\u5668\u91c7\u75289~12A\u7684\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e0d\u9700\u8981\u8003\u8651\u8d77\u52a8\u500d\u6570\u548c\u529f\u7387\u56e0\u6570\uff1b\u70ed\u7ee7\u7535\u5668\u540c\u6837\u91c7\u752812A\u5de6\u53f3\u7684\u89c4\u683c\uff0c\u4f46\u8981\u628a\u7535\u6d41\u6574\u5b9a\u5728\u7535\u52a8\u673a\u989d\u5b9a\u7535\u6d41\u76841~1.1\u500d\u8303\u56f4\u5185\uff1b\u7535\u52a8\u673a\u7684\u7194\u65ad\u5668\u6309\u7535\u52a8\u673a\u989d\u5b9a\u7535\u6d41\u76841.5~2.5\u500d\u9009\u53d6\uff1b\u7535\u6e90\u5f00\u5173\u91c7\u752820A\u7684\u5c0f\u578b\u7a7a\u6c14\u65ad\u8def\u5668\u5c31\u53ef\u4ee5\u4e86\u3002
\u4e09\u76f8\u7535\u673a\u7684\u989d\u5b9a\u7535\u6d41=\u989d\u5b9a\u529f\u7387\uff08W\uff09\u00f7\uff081.732\u00d7\u989d\u5b9a\u7535\u538b\u00d7\u529f\u7387\u56e0\u6570\u00d7\u6548\u7387\uff09
\u7ea6\u4e3a103\u5b89\u3002
接触器18A ......... 熔断器15A ........ 热继电器10A.........电源开关20A
经验数值 工作电流为8安左右 接触器选两倍以上20安的吧 溶断器选1.5至2.5倍 20安的 热继电器选倍1.3左右 都是可调的调整在10安左右吧
空开20A 接触器20A 熔断器16A 热继电器10A
绛旓細4KW鐨鐢靛姩鏈锛棰濆畾鍔熺巼鏄4KW锛鍦ㄩ瀹氱數鍘嬪拰璐熻浇鐨勬儏鍐典笅锛屽畠涓灏忔椂鑰楃數4搴︺傞瀹氬姛鐜囨槸鎸囩敤鐢靛櫒姝ｅ父宸ヤ綔鏃剁殑鍔熺巼锛屽畠鐨勫间负鐢ㄧ數鍣ㄧ殑棰濆畾鐢靛帇涔樹互棰濆畾鐢垫祦銆傝嫢鐢ㄧ數鍣ㄧ殑瀹為檯鍔熺巼澶т簬棰濆畾鍔熺巼锛屽垯鐢ㄧ數鍣ㄥ彲鑳戒細鎹熷潖锛涜嫢瀹為檯鍔熺巼灏忎簬棰濆畾鍔熺巼锛屽垯鐢ㄧ數鍣ㄥ彲鑳芥棤娉曡繍琛屻傜洿娴佺數璺腑锛岄瀹氱數鍘嬩笌棰濆畾鐢垫祦鐨勪箻绉氨鏄...
绛旓細Y112M-4鍨嬬殑鍚屾杞熶负50*60/4=1500rpm锛岄瀹氳浆閫熶负1440rpm锛岄瀹氳浆宸巼s=(1500-1440)/1500=0.04锛棰濆畾鍔熺巼涓4kW锛岄瀹氭壄鐭㏕=9545.45*4/1440鈮26.5N.M Y160M-8鍨嬬殑鍚屾杞熶负50*60/8=750rpm锛岄瀹氳浆閫熶负720rpm锛岄瀹氳浆宸巼s=(750-720)/750=0.04锛涢瀹氭壄鐭㏕=9545.45*4/720鈮53N...
绛旓細鐪鐢靛姩鏈鐨勫惎鍔ㄦ柟寮 鍙橀鍚姩涔樹互2.5 灏辨槸10KW 鍏朵粬鍚姩鏂瑰紡姣斿鏄熶笁瑙掓垨鐩存帴鍚姩閭ｅ氨澶х殑澶氫簡
绛旓細涓涓崈鐡﹀搴斾袱涓數娴佹槸閽堝涓夋劅鎬ц礋杞借岃█銆備緥濡傦紝棰濆畾鍔熺巼涓4KW鐨鐢靛姩鏈猴紝鍏堕瀹氱數娴佸氨绾︽槸4脳2=8A锛涢瀹氬姛鐜囦负7.5KW鐨勭數鍔ㄦ満锛屽叾棰濆畾鐢垫祦灏辩害鏄7.5脳2=15A锛涢瀹氬姛鐜囦负15KW鐨勭數鍔ㄦ満锛屽叾棰濆畾鐢垫祦灏辨槸15脳2=30A銆備笁鐩哥數璐熻浇宸ヤ綔1KW鐨勫姛鐜囷紝鍏朵富鍥炶矾鐢电紗鐨勭數娴佸湪鏁板间笂绾︾瓑浜庡叾鍔熺巼鏁板肩殑涓ゅ嶃傝繖...
绛旓細鐢垫満棰濆畾鐢垫祦=4000/220銆傜數鏈虹嚎鍦堟秷鑰楃殑鍔熺巼=鐢垫祦*鐢垫祦* 鐢甸樆=(4000/220)X(4000/220)X1.8=595W P=I*I*R 銆傛璁扮‖鑳屾病鎰忎箟锛屽叧閿潬鐞嗚В銆傝嚜宸辨暣鐞嗕竴涓嬫牸寮忓惂锛屼篃鑳介『渚挎暣鐞嗘濊矾锛屽姞娣卞嵃璞°
绛旓細濡傛灉鐢靛姩鏈鎷栧姩绯荤粺娌℃湁鐗规畩瑕佹眰鐨勮瘽锛屽彲閫変换浣曚竴绉嶉氱敤鍙橀鍣ㄣ傚彉棰戝櫒鐨勫弬鏁板簲鍚屾椂婊¤冻锛1銆佸彉棰戝櫒鐨勯瀹氳緭鍑哄姛鐜囧ぇ浜庣瓑浜庣數鍔ㄦ満鐨棰濆畾鍔熺巼锛2銆佸彉棰戝櫒鐨勯瀹氳緭鍑虹數娴佸ぇ浜庣瓑浜庣數鍔ㄦ満鐨勯瀹氱數娴侊紱3銆佸彉棰戝櫒鐨勯瀹氳緭鍑虹數鍘嬪ぇ浜庣瓑浜庣數鍔ㄦ満鐨勯瀹氱數鍘嬨
绛旓細妤间富浣犲ソ锛佺數璺腑鐢垫祦涓猴細4000W/220V=18.18瀹 閭ｄ箞鍙戠儹鍔熺巼涓锛18.18瀹*18.18瀹*0.1娆=33W
绛旓細涓夌浉鐢垫瘡鍗冪摝澶氬皯涓數娴佽鐪嬭礋杞斤紝涓嶅悓鐨勮礋杞斤紝鐢垫祦涓嶅悓銆傞樆鎬х殑1.5A,锛1000w/3/220v=1.515A(涓夌浉1鍗冪摝锛夋劅鎬х殑2A锛氬鏋滆冭檻鍔熺巼鍥犳暟绾︿负0.8,鍒橮=I*U*鏍瑰彿3*0.8姣KW,绾跨數娴佺害涓:1000/(380*1.7*0.8)=1.9 鍗冲ぇ绾 鏄瘡涓崈鐡︾數娴佷负2A銆備緥濡傦紝棰濆畾鍔熺巼涓4KW鐨鐢靛姩鏈锛屽叾棰濆畾鐢垫祦灏辩害...
绛旓細涓夌浉鐢垫瘡鍗冪摝澶氬皯涓數娴佽鐪嬭礋杞斤紝涓嶅悓鐨勮礋杞斤紝鐢垫祦涓嶅悓銆傞樆鎬х殑1.5A,锛1000w/3/220v=1.515A(涓夌浉1鍗冪摝锛夋劅鎬х殑2A锛氬鏋滆冭檻鍔熺巼鍥犳暟绾︿负0.8,鍒橮=I*U*鏍瑰彿3*0.8姣KW,绾跨數娴佺害涓:1000/(380*1.7*0.8)=1.9 鍗冲ぇ绾 鏄瘡涓崈鐡︾數娴佷负2A銆備緥濡傦紝棰濆畾鍔熺巼涓4KW鐨鐢靛姩鏈锛屽叾棰濆畾鐢垫祦灏辩害...
绛旓細2012-12-27 鏈浣崇瓟妗 棰濆畾鍔熺巼P=4KWW=1KW*h鍙緵鐢垫椂闂磘=W/P=1/4h=15min鍥犳1kw.h鐨勭數鑳藉彲渚涜繖鍙鐢靛姩鏈姝ｅ父宸ヤ綔15min鏄笉鏄繕鏈夌浜岄棶? 鏈洖绛旂敱鎻愰棶鑰呮帹鑽 涓炬姤| 绛旀绾犻敊 | 璇勮(1) 20 3 shijunxiang105 閲囩撼鐜:69% 鏉ヨ嚜鍥㈤槦:鏁板杈呭鍥 鎿呴暱: 涓 楂樿 鏍″洯鐢熸椿 姹傝亴灏变笟 鐞嗗伐瀛︾ 鍏朵粬...
