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鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng) 鐧婚寗 | 鍏嶈不娉ㄥ唺

骞惰伅(li谩n)闆婚樆
闁辫畝锛�5449鏅傞枔锛�2017-07-07 15:21:09

    鍏╅粸绲勫苟鍒楅�ｆ帴鍦ㄩ浕璺腑绋辩偤骞惰伅(li谩n)闆婚樆锛屽彟澶栫敱鍠磾鐨勫苟鑱�(li谩n)闆婚樆鎴栫敤闆诲櫒锛堢敤闆诲櫒锛氬锛岄浕瑕栨锛岀┖瑾�(di脿o)锛�闆昏叇绛夛級妲�(g貌u)鎴愮殑闆昏矾绋辩偤骞惰伅(li谩n)闆昏矾銆傚皪姣斾簬绗簩鍊嬮浕璺�锛岄浕闃伙紙鐢ㄩ浕鍣級锛屼緷娆￠�ｆ帴璧蜂締鐨勭偤涓茶伅(li谩n)闆昏矾銆�

瀹氱京

    骞惰伅(li谩n)闆昏矾锛氬苟鑱�(li谩n)鐨勫悇鏀矾闆诲鐩哥瓑锛屽共璺浕娴佺瓑浜庡悇鍊嬫敮璺拰琛ㄩ仈寮忥細闆婚樆R1R2R3鈥︹�n骞惰伅(li谩n),闆诲U1=U2=鈥︹��=Un骞茶矾闆绘祦锛欼n=I1+I2+鈥︹��+In鐢变簬P=UI,I=U/R锛屼唬鍏�锛屽苟鑱�(li谩n)闆婚樆鐨勫姛鐜囨瘮P1:P2:P3鈥︹�︼細Pn=U1^2/R1:U2^2/R2鈥︹�n^2/Rn=1/R1:R2鈥︹��1/Rn鐢变簬鏄磾闆婚樆锛岀櫦(f膩)鐔辨瘮Q1:Q2鈥︹�︼細Qn=Pn姣�=1/R1:R2鈥︹��1/Rn
闆婚樆瀹氱京

鎳�(y墨ng)鐢�

    骞惰伅(li谩n)闆婚樆鐨勮▓绠楀叕寮�
    1.闆绘祦瑷堢畻
    I绺�=I1+L2+......+In
    鍗崇附闆绘祦绛変簬閫氶亷鍚勫�嬮浕闃荤殑闆绘祦涔嬪拰
    2.闆诲瑷堢畻
    U绺�=U1=U2=鈥︹��=Un
    骞惰伅(li谩n)闆昏矾鍚勬敮璺叐绔殑闆诲鐩哥瓑锛屼笖绛変簬绺介浕澹�
    3.闆婚樆鍊艰▓绠�
    1/R绺�=1/R1+1/R2+鈥︹��+1/Rn
    鍗崇附闆婚樆鐨勫�掓暩(sh霉)绛変簬鍚勫垎闆婚樆鐨勫�掓暩(sh霉)涔嬪拰
    鐗瑰垾鐨勶紝鍏╅浕闃诲苟鑱�(li谩n)绺藉�肩偤锛�  銆�
    灏嶄簬n鍊嬬浉绛夌殑闆婚樆骞惰伅(li谩n)锛屽叕寮忓氨绨″寲鐐篟骞�=R/n
    4.骞惰伅(li谩n)闆婚樆鍊肩殑浼扮畻
    锛�1锛夎嫢骞惰伅(li谩n)鐨勫叐闆婚樆鍊间箣闁撹秴閬庡洓鍊�锛屽墖绺介浕闃诲皬浜庝换涓�骞惰伅(li谩n)闆婚樆涔嬪�笺��
    锛�2锛夎嫢骞惰伅(li谩n)鐨勫叐闆婚樆鍊间箣闁撳皬浜庡洓鍊�锛屽墖绺介浕闃诲皬浜�  銆傞憭浜庢牴铏熶笉渚夸簬鍙ｇ畻锛岄倓鍙瓑鏄庣暥(d膩ng)鍏╅浕闃诲�间箣闁撳皬浜庝笁鍊嶏紝鍓囩附闆婚樆灏忎簬  銆�
    娉細绲�(ji茅)璜栵紙1锛夛紙2锛夌劇璜栨湁娌掓湁鍥涘�嶄箣闁撶殑闂�(gu膩n)绯荤祼(ji茅)璜栫附鏄垚绔嬬殑锛屽彧鏄苟鑱�(li谩n)闆婚樆闂�(gu膩n)绯讳笉鍚�锛屼及绠楃殑鍊肩簿搴︿笉鍚屻�傜祼(ji茅)璜栵紙2锛夊彲浠ュ埄鐢ㄥ熀鏈笉绛夊紡璀夋槑銆傝垑渚嬶細鍏╅浕闃�2鍜�4锛岀敤锛�1锛変及绠楀皬浜�2锛岀敤锛�2锛変及绠楀皬浜�  锛屾垨1.5銆�
    鐢ㄥ湒瑙ｆ硶姹傚苟鑱�(li谩n)闆�
    1.鏂规硶涓�
    鑻ヨ姹俁1鑸嘡2鐨勫苟鑱�(li谩n)闆婚樆鍊�锛屽彲鍏堜綔鐩磋鍧愭(bi膩o)绯粁Oy锛屽苟浣淵=X鐨勭洿绶歭锛屽湪OX杌镐笂鍙朅榛�锛屼娇OA闀峰害绛変簬R1鐨勯樆鍊�锛屽湪OY杌镐笂鍙朆榛烇紝浣縊B闀峰害绛変簬R2鐨勯樆鍊�锛岄�ｇ祼(ji茅)AB鑸囩洿绶歭鐩镐氦浜嶮榛烇紝鍓嘙榛炵殑鍧愭(bi膩o)(X鎴朰)鍊煎嵆鐐篟1鑸嘡2鐨勫苟鑱�(li谩n)闃诲��銆�
    璀夋槑锛� 浣淢D鈯X
    鈭� 鈻矨OB鈭解柍ADM
    鈭� AO/BO=AD/DM
    鍥燨D=DM锛屽苟瑷�(sh猫)鍏堕暦搴︾偤R鐨勬暩(sh霉)鍊�
    R1/R2=(R1-R)/R
    瑙ｅ緱锛� R=R1R2/(R1+R2)
    姝ゅ嵆R1銆丷2鐨勫苟鑱�(li谩n)闆婚樆鐨勯樆鍊�銆�
    鎳�(y墨ng)鐢ㄨ嫢闇�姹備笁鍊嬮浕闃荤殑骞惰伅(li谩n)闆婚樆鍊�锛屽彲鍏堟眰R1銆丷2鐨勫苟鑱�(li谩n)闆婚樆锛屽緱鍒癉榛�锛屽啀鍦∣Y杌镐笂鍙朇榛�锛屼娇OC闀峰害绛変簬R3鐨勫�硷紝閫D鑸噇鐩寸窔浜や簬N榛�锛屽墖N榛炵殑鍧愭(bi膩o)鍊肩偤R1銆丷2銆丷3鐨勫苟鑱�(li谩n)绺介樆鐨勯樆鍊�銆備緥濡傦紝浠1=4惟锛孯2=12惟锛孯3=6惟锛屾眰瑙ｇ祼(ji茅)鏋滅偤鍦�2鎵�绀�锛孯1銆丷2鐨勫苟鑱�(li谩n)绺介樆鐐�3惟锛孯1銆丷2銆丷3鐨勫苟鑱�(li谩n)绺介樆鐐�2惟銆�
    2.鏂规硶浜�
    鍦ㄥ钩闈笂浠诲彇涓�榛濷锛岀敤鐩镐簰浜よ鐐�120掳鐨勪笁鐭㈤噺浣滅偤鍧愭(bi膩o)杌窸X銆丱Y銆丱Z(姣忚桓鍧囧彲鍚戣矤(f霉)鍚戝欢浼�)锛岃嫢瑕佹眰R1銆丷2鐨勫苟鑱�(li谩n)闆婚樆锛屽彧瑕佸湪OX杌镐笂鍙朞A闀风瓑浜嶳1鐨勫��锛屽湪OY杌镐笂鍙朞B闀风瓑浜嶳2鍊�锛岄�ｇ祼(ji茅)AB锛屼氦OZ杌�(璨�(f霉)鍚�)浜嶤榛�锛屽墖OC闀峰害(鍊�)鍗崇偤鎵�姹傚苟鑱�(li谩n)闆婚樆闃诲�硷紟
    璀夋槑 闈㈢⿳S鈻矨OB=S鈻矨OC+S鈻矪OC
    鍗� (1/2)AO脳BO脳Sin120掳
    =(1/2)AO脳OC脳Sin60掳+(1/2)BO脳OC脳Sin60掳AO脳BO =AO脳OC+BO脳OCR1R2=R1R+R2R
    鈭� R=R1R2/(R1+R2)
    鎳�(y墨ng)鐢� 鍙柟渚垮湴閫ｇ簩(x霉)姹傝В澶氬�嬮浕闃荤殑骞惰伅(li谩n)鍊�銆備緥濡�锛岃嫢瑕佹眰R1銆丷2銆丷3鐨勫苟鑱�(li谩n)绺介樆鐨勯樆鍊�锛屽彧闇�鍏堟眰鍑篟1銆丷2骞惰伅(li谩n)鍚庣殑闃诲�糝12(鍗冲緱鍒癈榛�)锛屽啀鍦∣A鐨勮矤(f霉)鍚戝彇涓�榛濪锛屽揩OD闀风瓑浜嶳3鐨勫��锛岄�ｇ祼(ji茅)CD浜Y杌镐簬E榛烇紝鍓嘜E闀峰嵆鐐篟1銆丷2銆丷3鐨勫苟鑱�(li谩n)绺介樆鐨勯樆鍊�锛屽鍦�3銆傚R1=4惟锛孯2=12惟锛孯3=6惟锛屾寜姝ゆ硶鍙眰鍑篟12=3惟锛汻1銆丷2銆丷3涓夐浕闃诲苟鑱�(li谩n)闆婚樆鍊肩偤2惟锛屽鍦�4銆�
    浠ヤ笂姹傝В鏂规硶灏嶄簬姹傞浕瀹瑰櫒涓茶伅(li谩n)銆佸綀绨т覆鑱�(li谩n)锛屽嚫閫忛彙鎴愯薄绛夎垏闆婚樆骞惰伅(li谩n)鏈夌浉浼艰▓绠楀叕寮忕殑鍟忛锛屽悓妯ｉ仼鐢�
    鐢ㄦ暩(sh霉)瀛�(xu茅)鏂规硶绠楅樆鍊�
    鍥犵偤鍦ㄥ苟鑱�(li谩n)闆昏矾涓共璺浕娴佺瓑浜庡悇鍊嬫敮璺浕娴佷箣鍜孖绺�=I1+I2+I3+I4+.........+In锛屽共璺浕澹撶瓑浜庡悇鐢ㄩ浕鍣ㄩ浕澹揢绺�=U1=U2=鈥︹��=Un
    I绺�=U/R 1/R=I绺�/U
    I1=U/R1 1/R1=I1/U
    In=U/Rn 1/Rn=In/U
    鎵�浠�1/R1+1/R2+1/R3+........1/Rn=I1+I2I3+I4+.........+In/U=I绺�/U
    鎵�浠�1/R绺�=1/R1+1/R2+1/R3+......+1/Rn

鎬ц唱(zh矛)

    涓茶伅(li谩n)闆昏矾鐨勭壒榛�
    姝愬瀹氬緥锛欼=U/R
    璁婂舰姹傞浕澹擄細U=IR
    璁婂舰姹傞浕闃伙細R=U/I
    闆诲鐨勯棞(gu膩n)绯伙細U=U1+U2
    闆绘祦鐨勯棞(gu膩n)绯伙細I=I1=I2
    闆婚樆鐨勯棞(gu膩n)绯伙細R=R1+R2
    骞惰伅(li谩n)闆昏矾鐨勭壒榛�
    闆诲鐨勯棞(gu膩n)绯伙細U=U1=U2
    闆绘祦鐨勯棞(gu膩n)绯伙細I=I1+I2
    闆婚樆鐨勯棞(gu膩n)绯伙細1/R=1/R1+1/R2
    闆诲姛鐨勮▓绠楋細W=UIt
    闆诲姛鐜囩殑瀹氱京寮忥細P=W/t
    甯哥敤鍏紡锛歅=UI
    鐒﹁�冲畾寰嬶細Q鏀�=I2Rt
    灏嶄簬绱旈浕闃婚浕璺�岃█锛歈鏀�=I2Rt =U2t/R=UIt=Pt=UQ=W
    鐓ф槑闆昏矾鐨勭附鍔熺巼鐨勮▓绠楋細P=P1+P1+鈥︹��

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