已知三相电机3KW,Ue=380V,I=6.8A,每相绕组电阻值约5欧，这个I和R是怎么算出来的，求具体算法。。。。。。 15KW三相电机绕组电阻是多少
2\u3001\u6709\u4e00\u4e09\u76f8\u7535\u52a8\u673a\uff0c\u6bcf\u76f8\u7b49\u6548\u7535\u963bR=29\u03a9\uff0c\u7b49\u6548\u611f\u6297XL=21.8\u03a9\u3002\u7ed5\u7ec4\u4e3a\u661f\u578b\u8054\u7ed3\uff0c\u63a5\u4e8e\u7ebf\u7535\u538bUL=380V\u7684\u4e09\u76f8\u7535\u661f\u578b\u63a5\u6cd5\uff0c\u7ebf\u7535\u538bUL=380V\uff0c\u6240\u4ee5\u76f8\u7535\u538bU\u76f8=380/1.732=220V\u3002\u76f8\u963b\u6297R\u76f8=\u6839\u53f7\uff0829^2+21.8^2\uff09=36.28\u03a9\uff0c\u76f8\u7535\u6d41I\u76f8=U\u76f8/R\u76f8=6A\uff0c\u7ebf\u7535\u6d41I\u7ebf=\u76f8\u7535\u6d41I\u76f8=6A\uff0c\u529f\u7387P=3*U\u76f8*I\u76f8=4kW
15KW\u7684\u4e09\u76f8\u7535\u673a\u7ed5\u7ec4\u6b63\u5e38\u7684\u8bdd\u5e94\u8be5\u57282\u6b27\u4ee5\u4e0b\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u7535\u673a\u94ed\u724c\u4e0a\u7684\u989d\u5b9a\u7535\u6d41\u3001\u989d\u5b9a\u7535\u538b\u8ba1\u7b97\u7684\u3002
1\u3001\u6807\u51c6\u7535\u963b\u4e00\u822c\u7528\u4e8e\u5bf9\u5176\u4ed6\u7535\u963b\uff0c\u6216\u5e26\u7535\u963b\u5668\u4ef6\u7684\u8861\u91cf\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u6807\u51c6\u963b\u503c\u7684\u53c2\u7167\u6216\u6bd4\u8f83\u3002
2\u3001\u5bfc\u4f53\u5bf9\u7535\u6d41\u7684\u963b\u788d\u4f5c\u7528\u5c31\u53eb\u8be5\u5bfc\u4f53\u7684\u7535\u963b\u3002\u7535\u963b\u5668\u7b80\u79f0\u7535\u963b\uff08Resistor\uff0c\u901a\u5e38\u7528\u201cR\u201d\u8868\u793a\uff09\u662f\u6240\u6709\u7535\u5b50\u7535\u8def\u4e2d\u4f7f\u7528\u6700\u591a\u7684\u5143\u4ef6\u3002\u7535\u963b\u7684\u4e3b\u8981\u7269\u7406\u7279\u5f81\u662f\u53d8\u7535\u80fd\u4e3a\u70ed\u80fd\uff0c\u4e5f\u53ef\u8bf4\u5b83\u662f\u4e00\u4e2a\u8017\u80fd\u5143\u4ef6\uff0c\u7535\u6d41\u7ecf\u8fc7\u5b83\u5c31\u4ea7\u751f\u5185\u80fd\u3002\u7535\u963b\u5728\u7535\u8def\u4e2d\u901a\u5e38\u8d77\u5206\u538b\u5206\u6d41\u7684\u4f5c\u7528\uff0c\u5bf9\u4fe1\u53f7\u6765\u8bf4\uff0c\u4ea4\u6d41\u4e0e\u76f4\u6d41\u4fe1\u53f7\u90fd\u53ef\u4ee5\u901a\u8fc7\u7535\u963b\u3002
3\u3001\u7535\u963b\u90fd\u6709\u4e00\u5b9a\u7684\u963b\u503c\uff0c\u5b83\u4ee3\u8868\u8fd9\u4e2a\u7535\u963b\u5bf9\u7535\u6d41\u6d41\u52a8\u963b\u6321\u529b\u7684\u5927\u5c0f\u3002\u7535\u963b\u7684\u5355\u4f4d\u662f\u6b27\u59c6\uff0c\u7528\u7b26\u53f7\u201c\u03a9\u201d\u8868\u793a\u3002\u6b27\u59c6\u662f\u8fd9\u6837\u5b9a\u4e49\u7684\uff1a\u5f53\u5728\u4e00\u4e2a\u7535\u963b\u5668\u7684\u4e24\u7aef\u52a0\u4e0a1\u4f0f\u7279\u7684\u7535\u538b\u65f6\uff0c\u5982\u679c\u5728\u8fd9\u4e2a\u7535\u963b\u5668\u4e2d\u67091\u5b89\u57f9\u7684\u7535\u6d41\u901a\u8fc7\uff0c\u5219\u8fd9\u4e2a\u7535\u963b\u5668\u7684\u963b\u503c\u4e3a1\u6b27\u59c6\u3002
4\u3001\u5e38\u89c1\u7684\u78b3\u819c\u7535\u963b\u6216\u91d1\u5c5e\u819c\u7535\u963b\u5668\u5728\u6e29\u5ea6\u6052\u5b9a\uff0c\u4e14\u7535\u538b\u548c\u7535\u6d41\u503c\u9650\u5236\u5728\u989d\u5b9a\u6761\u4ef6\u4e4b\u5185\u65f6\uff0c\u53ef\u7528\u7ebf\u6027\u7535\u963b\u5668\u6765\u6a21\u62df\u3002\u5982\u679c\u7535\u538b\u6216\u7535\u6d41\u503c\u8d85\u8fc7\u89c4\u5b9a\u503c\uff0c\u7535\u963b\u5668\u5c06\u56e0\u8fc7\u70ed\u800c\u4e0d\u9075\u4ece\u6b27\u59c6\u5b9a\u5f8b\uff0c\u751a\u81f3\u8fd8\u4f1a\u88ab\u70e7\u6bc1\u3002
5\u3001\u7535\u963b\u7684\u79cd\u7c7b\u5f88\u591a\uff0c\u901a\u5e38\u5206\u4e3a\u78b3\u819c\u7535\u963b\uff0c\u91d1\u5c5e\u7535\u963b\uff0c\u7ebf\u7ed5\u7535\u963b\u7b49\uff1a\u5b83\u53c8\u5305\u542b\u56fa\u5b9a\u7535\u963b\u4e0e\u53ef\u53d8\u7535\u963b\uff0c\u5149\u654f\u7535\u963b\uff0c\u538b\u654f\u7535\u963b\uff0c\u70ed\u654f\u7535\u963b\u7b49\u3002
6\u3001\u901a\u5e38\u6765\u8bf4\uff0c\u4f7f\u7528\u4e07\u7528\u8868\u53ef\u4ee5\u5f88\u5bb9\u6613\u5224\u65ad\u51fa\u7535\u963b\u7684\u597d\u574f\uff1a\u5c06\u4e07\u7528\u8868\u8c03\u8282\u5728\u7535\u963b\u6321\u7684\u5408\u9002\u6321\u4f4d\uff0c\u5e76\u5c06\u4e07\u7528\u8868\u7684\u4e24\u4e2a\u8868\u7b14\u653e\u5728\u7535\u963b\u7684\u4e24\u7aef\uff0c\u5c31\u53ef\u4ee5\u4ece\u4e07\u7528\u8868\u4e0a\u8bfb\u51fa\u7535\u963b\u7684\u963b\u503c\u3002\u5e94\u6ce8\u610f\u7684\u662f\uff0c\u6d4b\u8bd5\u7535\u963b\u65f6\u624b\u4e0d\u80fd\u63a5\u89e6\u5230\u8868\u7b14\u7684\u91d1\u5c5e\u90e8\u5206\u3002\u4f46\u5728\u5b9e\u9645\u7535\u5668\u7ef4\u4fee\u4e2d\uff0c\u5f88\u5c11\u51fa\u73b0\u7535\u963b\u635f\u574f\u3002\u7740\u91cd\u6ce8\u610f\u7684\u662f\u7535\u963b\u662f\u5426\u865a\u710a\uff0c\u8131\u710a\u3002
I 是电动机在额定负荷下的电流，也就是额定电流。
这些数据都是试验测量值。
电机设计时到出厂，通过大量试验就确定了。应该是设计好了测量得到的指标。
绛旓細R 鏄鐢靛姩鏈绾垮湀鐨勭洿娴佺數闃汇侷 鏄數鍔ㄦ満鍦ㄩ瀹氳礋鑽蜂笅鐨勭數娴侊紝涔熷氨鏄瀹氱數娴併傝繖浜涙暟鎹兘鏄瘯楠屾祴閲忓笺
绛旓細鍦ㄤ笁鐩哥數鍔ㄦ満棰濆畾鐢垫祦鐨勮绠楀叕寮忎腑锛"ue" 閫氬父浠ｈ〃鐨勬槸鐢靛姩鏈虹殑棰濆畾鐢靛帇銆傝繖涓數鍘嬪兼槸鎸囩數鍔ㄦ満璁捐鏃舵墍渚濇嵁鐨勩佸苟鍦ㄩ瀹氬伐浣滄潯浠朵笅鎵搴旀柦鍔犵殑绾跨數鍘嬨傝缁嗘潵璇锛屼笁鐩哥數鍔ㄦ満鐨勯瀹氱數娴佽绠楁槸鍩轰簬鍏堕瀹氬姛鐜囷紙閫氬父琛ㄧず涓"P"锛夈侀瀹氱數鍘嬶紙"ue"锛夈佸姛鐜囧洜鏁帮紙鍙兘琛ㄧず涓"cosφ"鎴"pf"锛夛紝浠ュ強鐢靛姩...
绛旓細涓洪瀹氱數娴佺殑1.05鍒1.1鍊嶃1fr,31.5A 2fr:18.2A 涓夎鍐呯數娴佹槸澶栭潰鐢垫祦棰濆畾鍊奸櫎鏍3銆傝嚜宸卞厛鎼炴槑鐧藉啀鏁欏埆浜恒
绛旓細鍚姩鐢垫祦鏄瀹氱數娴侊紙4~7锛夊嶏紝鐪嬩綘缁欑殑鏁版嵁鐢垫満搴旇鏄2鏋佺殑锛屽惎鍔ㄧ數娴佸嶆暟鎸7鍊嶈绠
绛旓細2010骞翠腑鍥界殑姹借溅甯傚満鍙皳鏄閫熷彂灞曪紝鏍规嵁鍏ㄥ浗涔樼敤杞﹀競鍦鸿仈甯細鏁版嵁缁熻鎴鍒11鏈堜唤2010骞翠箻鐢ㄨ溅閿閲忚揪鍒颁簡1180涓囪締锛屽悓姣斿骞呬负25.6%銆傚叾涓互寰涓嶅お鍙楀叧娉ㄧ殑MPV澧為噺鍙皳鏄ぇ骞呭闀匡紝11鏈堢疮璁￠攢閲忚秴杩38涓囪締锛屽悓姣斿闀夸簡83.2%銆傚悇涓巶鍟嗕篃閮界湅濂戒簡杩欎竴甯傚満锛岀悍绾锋帹鍑烘垨寮曞叆MPV杞﹀瀷銆備粠涓婅〃鎴戜滑鍙互鐪嬪嚭锛...
绛旓細杩欎釜鍏紡鍛婅瘔鎴戜滑锛岀數鏈虹殑鍔熺巼鏄數鍘嬪拰鐢垫祦鐨勪箻绉傚洜姝わ紝鐢垫祦锛圛锛夊彲浠ヨ〃绀轰负锛欼 = P/V 杩欎釜鍏紡鍛婅瘔鎴戜滑锛岀數娴佹槸鍔熺巼闄や互鐢靛帇銆傚皢P=3KW=3000W浠ｅ叆涓婂紡锛岀數鍘媀=380V锛屽嵆鍙眰鍑虹瓟妗堛傝绠楃粨鏋滀负锛氱數鏈虹殑鐢垫祦鏄 8.42 A銆傛墍浠ワ紝涓涓3KW鐨涓夌浉鐢垫満鍦380V鐨勭數鍘嬩笅锛屽叾姝ｅ父宸ヤ綔鐨勭數娴佹槸 8.42 A銆
绛旓細I=P/鈭3*U*COS蠁畏 涓夌浉鐢靛湪骞宠 鐨勬儏鍐典笅锛岄氬父姣廗W鐢垫祦鍦2A宸﹀彸锛3KW灏辨槸6A宸﹀彸鐢垫祦銆
绛旓細棣栧厛3kw鏄寚鍦ㄩ瀹氭秷鑰楀姛鐜囨椂鑰楃數鏄3kw锛浣嗘鏃跺弽搴斿湪涓夌浉鐢佃〃涓婁笉鍙瘡灏忔椂涓夊害鐢垫湁鍔熺巼鍥犵礌闂锛鐢垫満鍔熺巼鍥犵礌涓嶄负1锛夛紝鍏舵涓嶆槸鍦ㄩ瀹氬姛鐜囦娇鐢ㄦ椂鍔熺巼灏变笉鏄3kw浜嗭紝鍙ぇ鍙皬 涓夌浉鍔ㄥ姏璐熻浇鐢垫祦涓嶆槸姣忎竴鏍圭殑鐩哥嚎涓婄殑鐢垫祦灏辨槸瀹冮瀹氬姛鐜囩殑涓夊垎涔嬩竴锛屾湁鐩镐綅瑙掗棶棰橈紝瀹為檯涓婃祦杩囨瘡涓鐩哥殑鐢垫祦涔熸祦杩囧彟澶2...
绛旓細鎺ㄨ崘鍏紡:I0 = 2Ie(1-COS蠁) (3-22)寮忎腑 1e涓涓鐢靛姩鏈哄畾瀛愰瀹氱數娴侊紝A锛岀敱閾墝涓婃煡鍑;cos蠁涓涓鐢靛姩鏈虹┖杞借繍琛屾椂鍔熺巼鍥犳暟;銆愪緥1銆戜竴鍙 JO2 -61-4鍨嬬殑涓夌浉寮傛鐢靛姩鏈虹殑閾墝鏁版嵁涓 Pe=13kW; Ue=380V锛孖e=25.5A锛宑os蠁 e =0.88锛1e =0.88锛岃瘯纭畾璇ョ數鍔ㄦ満鐨勭┖杞界數 娴佸笺傝В(1...
绛旓細001锛圞W锛,鑻Ue=380V Ie=32A 鍔熺巼鍥犳暟涓鑸彇0銆8~0銆9锛岃繖閲屽彇0銆9锛屾晥鐜囦竴鑸彇75~90%, 杩欓噷鍙80%锛屽垯锛涓夌浉鐢靛姩鏈棰濆畾鍔熺巼锛歅=1.73*380*32*0.9*0.80*0.001=15.146(KW),杩欏彴鐢垫満鐨勫姛鐜囨槸15KW
