Yanmar 3JH3E - 5. Alternator 12 V;80 A (OPTIONAL); 5-1 Features; 5-2 Specifications; 5-3 Characteristics

Chapter 9 Electrical System
5.
Alternator (OPTIONAL)
3,4JH3(B)(C)E
5. Alternator
12V/80A (OPTIONAL)
The
alternator
serves
to
keep
the
battery
constantly
charged. It is installed on
the
cylinder block
by
a bracket,
and is driven from the V-pulley at the end of the crankshaft
by
a V belt.
The
type
of alternator used
in
this engine is ideal
for
high speed engines with a
wide
range of engine speeds.
It
contains
diodes
that convert AC to DC, and an IC regu•
lator that keeps the generated voltage constant even
when the engine speed changes.
5-2
Specifications
Model of alternator
Model
of
IC regulator
Battery voltage
Nominal output
Earth polarity
Direction of rotation
5-1 Features
(viewed from pulley end)
The alternator contains a regulator using an IC, and has
the following features.
(1) The
IC
regulator
is
self contained, and has no
mov·
ing
parts
(mechanical
contact
points)
It
therefore
has superior features such
as
freedom from vibration,
no fluctuation of voltage during use,
and
no need for
read·justment.
Also, it is of the over•heating compensation type
and
can
automatically
adjust
the
voltage
to
the
most suitable level
depending
on the operating tern·
perature.
(2) The regulator
is
integrated within the alternator to
simplify external wiring.
(3) It
is
an
alternator
designed
for
compactness,
light·
ress
of weight, and high output.
~4)
A newly developed
U·shaped
diode
is used to provide
increased reliability and
easier
checking
and
mainte·
nance.
(5) As the alternator is to be installed on board. the follow·
ing
measures
are taken to provide salt-proofing.
1) The front
and
rear covers are salt·proofed.
2)
Salt·proof paint
is
applied to the diode.
3)
The terminal, where the inboard harness is
con·
nected to the alternator, is nickel plated.
5-3
Characteristcs
15
12
(l)
O>
9
~
0
>
"O
QJ
1§
6
~
gi
0:
3
0
<(
c
~
:5
u
-s
a.
...
-s
0
100
I
80
_v
.--
7
60
I
I
40
I
20
0
0
2
4
Weight
Rated speed
Operating speed
Speed for
13.SV
Output current
at
2o·c
Regulated voltage
I
I
Regulated voltage
Output current for
13.SV
6
8
10
Speed
of
alternator (rpm)
9-30
12
LR180·03 (HITACHI)
TRIZ·63 (HITACHI)
12V
12V/80A
Negative earth
(S)
Clockwise
5.8kg
5000
rpm
1000
~
9000
1000 or less
over 78A/5000
rpm
14.5±0.3V(Standard temperature
voltage gradient,-0.01/°C)
14X10
3
Printed in Japan
HINSHI-H8009