8-6

(1) ()

- , .

- : H J , H

J

B-H

- : , , ( )

- , B J

- B H

- () : ()

8-10

(2) (hysteresis loop)

- (): B H

- ():

- (): 0

- : , , : ,

8-11

(3) ()

- = (B)

[J/m3] (8-19)

- 1[s] f[Hz]

Wm (8-20)

- v , 1[s] f[Hz]

W

- ,

:

-

Jm (8-21)

-

Wm (8-22)

8-12

f=60[Hz] . (, =30[cm2] Hc=7.5[AT/m], Br=1.5[Wb/m2] .

0 5 10 15H

B

+Br

+Hc-Hc

-Br

8-12

[] 1 . V[m3], f[Hz]

W

8 .5

8-7

- : ,

: ,

8-13

- 8-13

S

N

I

C

l

dlH

- i[A] H

ATm (8-23)

- B 8-13

- 0 B

Jm (8-24)

-

J (8-25)

4000 0.1[Wb/m2] [J/m3] .

[] (8-24)

[J/m3]

.

8 .6

8-8

S

N

I

C

l

dlH

8-14

(1)

AT (8-26)

- F

ATm (8-27)

[Wb] (8-28)

AT (8-29)

ATWb (8-30)

- (8-29), (8-30) (8-28) , ohm

Wb (8-31)

H[AT/m] E [V/m]

[AT] V[V]

[Wb] I[A]

R m [AT/Wb] R []

B [Wb/m2] i[A/m2]

[H/m] k[/m]

8-2

1000[AT]

510-5[Wb] .

[] (8-31)

ATWb

. 0.5[m2], 0.8[m], 20. [AT/Wb] .

[] (8-31)

ATWb

8 .7

8 .8

(2)

1)

- :

- : (, )

2) () - : 1020

- : 102~104

3) () - :

- :

4)

- : (+) (-)

- :

8-9

(1)

-

0 (KCL)

(8-32)

S

N

I

C

l

dlH

. (KVL)

- KVL

- KVL

(8-33)

(2)

-

(8-34)

-

(8-35)

3 . B

. 1=5000, 2=20000,

3=30000, S=1510-4[m2], l1=100[mm], l2=200[mm], l3=300[mm].

[] (8-34)

ATWb

8 .9

(3)

-

ATWb (8-36)

ATWb (8-37)

ATWb (8-38)

8-15

Wb (8-39)

-

ATm (8-41)

ATm (8-42)

(8-43)

( )

- ,

AT (8-44)

AT (8-45) AT (8-46)

, l, S[m]

l2 ?

[] Rm1, Rm2

ATWb

ATWb

ll2

ATWb

8 .10