smfl-86150ks Samwha Electric Co., Ltd., smfl-86150ks Datasheet - Page 15

• Manufacturer Part Number: smfl-86150ks
• Description: A.c. Harmonic Filter
• Manufacturer: Samwha Electric Co., Ltd.

Samwha
Samwha 42
〉
To explain the effect of surge absorbing capacitor, the rotator is expressed as intensive equivalent
resistance R as in the figure A.
In parallel with this, on the circuit to which the protecting Capcitor is connected,
VO = EOH[t] travelling wave invaded from line of surge impedance Z.
Then, when terminal voltage of R and C is Vc, the current Ip at P point i
(
When Z and R is constant and C is changed, the terminal voltage of the rotator Vc is as in the figure B.
From this, it can be seen that the wave height value is reduced
according to the value of C or R. When R = ∞ and C = 0.3㎌, the terminal voltage of the rotator is
reduced to 1/2 of invasion wave, which shows the effects of surge absorbing capcitor
Ip
To rearrange the expression ── =
PVc
Vc
CRZ
R+Z
── =
Operation principle
=
=
(
= ── Vc =
C ── +
2Eo
── ×
CZ
( (
dVc
CRZ
R+Z
dt
α
Figure A
Figure B
── H[t] =
P+α
1
─ Vc =
1
R
Creative TEchnology Provider
2Eo
── H[t]
CZ
Voltage
4-9 Surge Absorbing Capacitor
2Eo
── [1-e
αCZ
─ [2Vo - Vo]
1
Z
dt
d
-α t
] H[t]
P, Vo = EoH[t]
Time(㎲)
s
.