绗崄鍥涚珷
绋虫亽鐢垫祦鐨勭鍦轰範棰樿В绛旓紙浠呬綔鍙傝�冿級
14
锛?/p>
1
閫氭湁鐢垫祦
I
鐨勫绾垮舰鐘跺鍥炬墍绀猴紝鍥句腑
ACDO
鏄竟闀夸负
b
鐨勬鏂瑰舰锛庢眰鍦嗗績
O
澶勭殑纾佹劅搴斿己搴?/p>
B
銆?/p>
[
瑙ｇ瓟
]
鐢垫祦鍦?/p>
O
鐐圭殑浜х敓鐨勭鍦虹殑鏂瑰悜閮芥槸鍨傜洿绾搁潰鍚?
閲岀殑锛庢牴鎹瘯
-
钀ㄥ畾寰嬶細
0
0
2
d
d
4
I
r
飦?/p>
飦?/p>
飩?/p>
飥?
l
r
B
锛?/p>
鍦嗗姬涓婄殑鐢垫祦鍏冧笌鍒?/p>
O
鐐圭殑鐭㈠緞鍨傜洿锛?/p>
鍦?/p>
O
鐐逛骇鐢熺殑纾佸満澶у皬涓?/p>
0
1
2
d
d
4
I
l
B
a
飦?/p>
飦?/p>
飥?
锛?/p>
鐢变簬
d
l = a
d
蠁
锛?/p>
绉垎寰?/p>
1
1
d
L
B
B
飥?/p>
飪?/p>
3
/
2
0
0
d
4
I
a
飦?/p>
飦?/p>
飦?/p>
飦?/p>
飥?
飪?
0
3
8
I
a
飦?/p>
飥?/p>
锛?/p>
OA
鍜?/p>
OD
鏂瑰悜鐨勭洿绾垮湪
O
鐐逛骇鐢熺殑纾佸満涓洪浂锛?/p>
鍦?/p>
AC
娈碉紝
鐢垫祦鍏冨湪
O
鐐逛骇鐢熺殑纾佸満涓?/p>
0
2
2
d
sin
d
4
I
l
B
r
飦?/p>
飦?
飦?/p>
飥?/p>
锛?/p>
鐢变簬
l = b
cot(
蟺
-
胃
) = -
b
cot
胃
锛?/p>
鎵�浠?/p>
d
l
=
b
d
胃
/sin
2
胃
锛?/p>
鍙堢敱浜?/p>
r = b
/sin(
蟺
-
胃
) =
b
/sin
胃
锛?/p>
鍙緱
0
2
sin
d
d
4
I
B
b
飦?/p>
飦?/p>
飦?
飦?/p>
飥?/p>
锛?/p>
绉垎寰?/p>
鍚岀悊鍙緱
CD
娈靛湪
O
鐐逛骇鐢熺殑纾佸満
B
3
=
B
2
锛?/p>
O
鐐规�荤鎰熷簲寮哄害涓?/p>
0
0
1
2
3
3
2
8
4
I
I
B
B
B
B
a
b
飦?/p>
飦?/p>
飦?/p>
飥?/p>
飥?/p>
飥?/p>
飥?
飥?
锛?/p>
14
锛?/p>
6
鍦ㄥ崐寰勪负
R
= 1.0cm
鐨勬棤闄愰暱鍗婂渾鏌卞舰瀵间綋闈腑鍧囧寑鍦伴�氭湁鐢垫祦
I
=5.0A
锛?/p>
濡傚浘鎵�
绀猴紟姹傚渾鏌辫酱绾夸笂浠讳竴鐐圭殑纾佹劅搴斿己搴?/p>
B
=
锛?/p>
[
瑙ｇ瓟
]
鍙栧浣撻潰鐨勬í鎴潰锛岀數娴佹柟鍚戝瀭鐩寸焊闈㈠悜澶栵紟
鍗婂渾鐨勫懆闀夸负
C =
蟺
R
锛?/p>
鐢垫祦绾垮瘑搴︿负
i = I/C =
I蟺R
锛?/p>
鍦ㄥ崐鍦嗕笂鍙栦竴绾垮厓
d
l
=
R
d
蠁
浠ｈ〃鏃犻檺闀跨洿瀵肩嚎鐨勬埅
闈紝
鐢垫祦鍏冧负
d
I = i
d
l
=
I
d
蠁/蟺
锛?/p>
鍦ㄨ酱绾夸笂浜х敓鐨勭鎰熷簲寮哄害涓?/p>
0
0
2
d
d
d
2
2
I
I
B
R
R
飦?/p>
飦?/p>
飦?/p>
飦?/p>
飦?/p>
飥?/p>
飥?/p>
锛?/p>
鏂瑰悜涓庡緞鍚戝瀭鐩达紟
d
B
鐨勪袱涓垎閲忎负
d
B
x
= d
B
cos
蠁
锛?/p>
d
B
y
= d
B
sin
蠁
锛?/p>
I
C
O
b
a
D
A
鍥?/p>
14.1
l
r
胃
I
d
l
I
d
l
C
O
b
a
D
A
I
R
鍥?/p>
14.6