1
1.5.9
鍦ㄥ浘涓?/p>
,
浜斾釜鍏冧欢浠ｈ〃鐢垫簮鍜岃礋杞姐�傜數娴佸拰鐢靛帇鐨勫弬鑰冩柟鍚戝鍥句腑鎵�绀恒�?/p>
浠婇�氳繃瀹為獙娴嬮噺寰楃煡
I1 = -4A I2 = 6A I3 = 10A
U1 = 140V U2 = -90V U3 = 60V
U4 = -80V U5 = 30V
1
璇曟爣鍑哄悇鐢垫祦鐨勫疄闄呮柟鍚戝拰鍚勭數鍘嬬殑瀹為檯鏋佹�с�?/p>
2
鍒ゆ柇鍝簺鍏冧欢鏄數婧愶紵鍝簺鏄礋杞斤紵
3
璁＄畻鍚勫厓浠剁殑鍔熺巼锛?/p>
鐢垫簮鍙戝嚭鐨勫姛鐜囧拰璐熻浇鍙栫敤
鐨勫姛鐜囨槸鍚﹀钩琛★紵
瑙ｏ細
2
銆?/p>
鍏冧欢
1
锛?/p>
2
涓虹數婧愶紱
3
锛?/p>
4
锛?/p>
5
涓鸿礋杞姐�?/p>
3
銆?/p>
P
1
= U
1
I
1
= 140 * (-4)W = -560W P
2
= U
2
I
2
= (-90) * 6W = -540W
P
3
= U
3
I
3
= 60 *10W = 600W P
4
= U
4
I
1
= (-80)* (-4)W = 320W
P
5
= U
5
I
2
= 30 * 6W = 180W
鐢垫簮鍙戝嚭鍔熺巼
PE
=
P
1 +
P
2=1100
W
璐熻浇鍙栫敤鍔熺巼
P
=
P
3 +
P
4 +
P
5 = 1100
W
涓よ�呭钩琛?/p>
1.5.10
鍦ㄥ浘涓紝宸茬煡
I
1
= 3
mA
,
I
2
= 1
mA
.
璇曠‘瀹氱數璺厓浠?/p>
3
涓?/p>
鐨勭數娴?/p>
I
3
鍜屽叾涓ょ鐢靛帇
U
3
锛屽苟璇存槑瀹冩槸鐢垫簮杩樻槸璐熻浇銆傛牎
楠屾暣涓數璺殑鍔熺巼鏄惁骞宠 銆?/p>
瑙ｏ細棣栧厛鏍规嵁鍩哄皵闇嶅か鐢垫祦瀹氬緥鍒楀嚭
-I
1
+
I
2
- I
3
= 0
-
3 + 1
- I
3
= 0
鍙眰寰?/p>
I
3
=
-
2mA,
I
3
鐨勫疄闄呮柟鍚戜笌鍥句腑鐨勫弬鑰冩柟鍚戠浉鍙嶃�?/p>
鏍规嵁鍩哄皵闇嶅か鐢垫祦瀹氬緥鍙緱
U
3
= (30 + 10
*
10
3
*
3
*
10
-3
)
V
= 60
V
鍏舵纭畾鐢垫簮杩樻槸璐熻浇锛?/p>
1
浠庣數鍘嬪拰鐢垫祦鐨勫疄闄呮柟鍚戝垽瀹氾細
鐢佃矾鍏冧欢
3
鐢垫祦
I
3
浠?/p>
+
绔祦鍑?/p>
,
鏁呬负鐢垫簮
;
80V
鍏冧欢
鐢垫祦
I
2
浠?/p>
+
绔祦鍑猴紝鏁呬负鐢垫簮锛?/p>
30V
鍏冧欢
鐢垫祦
I
1
浠?/p>
+
绔祦鍏ワ紝鏁呬负璐熻浇銆?/p>
2
浠庣數鍘嬪拰鐢垫祦鐨勫弬鑰冩柟鍚戝垽鍒細
鐢佃矾鍏冧欢
3
U
3
鍜?/p>
I
3
鐨勫弬鑰冩柟鍚戠浉鍚?/p>
P
=
U
3
I
3
= 60
*
(
-
2)
*
10
-3
W
=
-
120
*
10
-3
W
锛堣礋
鍊硷級锛屾晠涓虹數婧愶紱
80V
鍏冧欢
U
2
鍜?/p>
I
2
鐨勫弬鑰冩柟鍚戠浉鍙?/p>
P
=
U
2
I
2
= 80
*
1
*
10
-3
W
=80
*
10
-3
W
锛堟鍊硷級锛?
鏁呬负鐢垫簮锛?/p>
30V
鍏冧欢
U
1
鍜?/p>
I
1
鍙傝�冩柟鍚戠浉鍚?/p>
P
=
U
1
I
1
= 30
*
3
*
10
-3
W
= 90
*
10
-3
W
锛堟鍊硷級锛屾晠
涓鸿礋杞姐�?/p>
涓よ�呯粨鏋滀竴鑷淬�?/p>
鏈�鍚庢牎楠屽姛鐜囧钩琛★細鐢甸樆娑堣�楀姛鐜?/p>
.
P
R
1
=
R
1
I
1
2
= 10
*
3
2
mW
= 90
mW
P
R
2
=
R
2
I
2
2
= 20
*
1
2
mW
= 20
mW
鐢垫簮鍙戝嚭鍔熺巼
.
P
E
=
U
2
I
2
+
U
3
I
3
= (80 + 120)
mW
= 200
mW
璐熻浇鍙栫敤鍜岀數闃绘崯鑰楀姛鐜?/p>
.
P
=
U
1
I
1
+
R
1
I
1
2
+
R
2
I
2
2
= (90 + 90 + 20)
mW
= 200
mW
涓よ�呭钩琛?/p>