Kubota Z400-B Handbuch Seite 77

• When the alternator is generating electricity at a
level below the controlled voltage
I-
- -
...
­
·6-------..,
f - - ­
(3)
IG
6
r - - -­
IG -I
I
I
+
®
t
F
.,.
L L
:@
r
,
-' ­
Tr2
I
I
I
J
P ,
E
As the engine starts and the alternator increases in rotating "8" exceeds the battery voltage, a charging current is allowed
speed, "Tr2" is turned off by the "M.IC" circuit. This turns to flow into the battery,
off the charge lamp (4). When the voltage across terminal
(1) Stator Coi I
(5) Battery
(2) Rotor Coil (6) Load
(3) Key Switch (7) IC Regulator
(4) Charge Lamp (8) Alternator
• When the alternator generates electricity (when
the controlled voltage is exceeded)
B- - - - -- I
p
I
IG
(3)
r-
IG
I
F ,
L L
r -
.J
I
Tr2
L_
-----<::>---E
(J)
®'
While "Tr1" remains on, the voltage across terminal "8"
increases. As the voltage exceeds the controlled voltage level
of 14.5 ± O.3V at 25°C· (77°F), it is detected by the "M.lC"
circuit which turns off "Tr1". As a result, the excitation
current for the rotor coil (2) is dampened by the counter
electromotive force absorbing diode "01", causing the
voltage across terminal "8" to fall.
If the voltage across terminal "8" falls below the controlled
M-B7
voltage level, it is detected by "M.IC" circuit which causes
"Tr1" to turn on again. Consequently, the excitation current
for the rotor coil (2) increases, causing the voltage across
terminal "8" to increase.
Thereafter, the operations described in the figures before
are repeated so that the voltage across terminal "8" is main­
tained at the controlled level.