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5. 4
POWER CIRCUIT
A. C.
generat
or capacity
for
450
The
generator
charging characterist ics
under
the
normal roted
electrical
load
is as follows A.C
generator
specifications
l.
Speed
and
direction
of rotation
Normal
:
300 to 11, 000
rpm
Counter'clockwise
rotation
Ma ximum :
22, 000
rpm
2
.
Normal load
Battery
capacity : 12 V
/
12
AH (
l O Hr.
rotingi
3.
Night
load
In ad dition lo
the
normal load, one 35
W,
two
3 W
and one 8
W
lamps loads ore added.
4.
Charging Characteristics
Load
I
Ch
.
I
Charging
current
(Al
arg,ng
I
ini tial rpm
I
··
I
!
1
300
0
rpm
15000
rpm
I
l
OOOOrprr.
---
-
-~-
-
-
-
·1
.
I
I
Day,
Igni
tion
l O~Orpm
3 _ 5 ± 0 . 514 . 5 ± 0 . 5
1
5 .?Mox
__
co
, _
i_l
-
-'--
--a_x
I
Night
(
1
J
-
-
I
I
Ignition coil
I
+
12V
35W
[
IH•LI
1
1800
rpm
l l +0.5
+0.51
M
+8W
(T•LI
Mox
·
O
l l.
? -0
.3
3 · 2
ox
+3WIB·LJ
1
I
-
.
+3W
X
2
lM•LI
Night
1111
·1
Ignitio
n
coi
l
+12V
25W
lH·LI
I
I
I
I
I
+8W
lT·
LI
I
+3
WX
2
I
lM·LI
I
I
1500
rpm
Mox
12.1
±0
512.9±0.5
4.0
I
I
5.
Coble Co
lor Code
Normal
circuit:
Yellow
Nig
ht
circuit
:
White
6.
Ignition timing mark
Mox
Timing
marks
LT
and
LF ore marked in
bloc
k.
C.
Se
lenium Rectifier
Rectifier is
a device which
changes the
A
.
C
(alternating) current to D. C (direct) current
and is
used
in
coniunction with
on alternator
or
A
C
generat ing co
il.
The
principle
of
its
rectification function
is that
it
permits
the current
to
flow
in
one direction
but
allows only
a
very
small
amount
to
flow
in the
reve
rse direction.
The type rectifier
most
commonly
used
ore
the
selenium,
silicon and geranium
rectifiers.
The
rect
ifying
element
of the selenium rectifier
is on
assembly consisting
of selenium wafers
as
terminal plates
and
spacers in the
proper
quantity
and connected in
either parallel or series,
depend ing
upon the
direction of
rectification.
(Fig. 5. 33)
,
..,
_css a;::;::;
.:
·;.
...
~
fig.
5.
33
Selenium rectiner
119
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