Table of Contents
Advertisement
GENERATOR
DESCRIPTION
The generator fitted
on this
machine
is
a MA-
RELLI
ON 62 N Type
(see
Fig. 114).
Features
are the
following: 300 W -
12 V
- 2400
RPM
-
bipolar
-
dia. 101 mm.
(4")
-
open con-
struction
type
-
separated
regulator unit. Rotor
suppo
rted
at ends
by two sealed-for-life
ball
bearings, which
do not require any maintenan-
ce.
Covers are secured
to
generator casing
by
means of
two
studs
passing
thru interpolar spa-
ces. On outer side of
generator
cover
(com
mu-
tator side)
there
are
the
terminals
0+
/
51
and
OF
(see
A and
B
on
Fig.
114).
0+
terminal
is
connected
to positive
brush,
while
OF
terminal
is
connected to
one end of the inductor winding.
D
+
and
OF generator
terminals
must be
con-
nected respectively
to 0
+
and OF
terminals
of
regulator unit.
OPERATION
When generator Is connected
to
regulator unit
and set into
rotation, generated current gra-
dually increases as
R.P.M. increase. No
current
will
be delivered until contacts
of regulator unit
are closed. After closing
of regulator
unit con-
tacts, current originated from generator will
flow
to battery and utilizers
and
intensity of
current wi
ll
depend on charge condition of
battery and absorption of inserted
utilizers,
accordingly to
the
setting of regulating section,
which consists of tension regulator
and current
limiter.
It
must be remembered that generator must
always work connected to its own regulator unit.
Therefore
, w
hen
carrying out
bed
tests or en-
gine tests it Is not advisable
to
connect
OF
terminal directly to
0+ terminal,
because in
such condition
the generator
will
act as a
sim-
ple
generator
shunt-excited and its tension
will
then
Increase following revs
increase
.
High
ten-
sion thus generated
will
cause
a strong exciting
current which might
damage inductor
winding.
Fig. 114
REGULATOR
UNIT
Regulator
unit is a MARELLI IR 50
SA
Type,
located
on upper frame beam
(see Fig
. 115).
Being the generator driven by
the
engine with
a rotation
range
subject
to accentuate
va ria-
tions, the adoption of the
generator
is
subordi-
nate to the availability of
a device able to keep
the tension originated
from the generator prac-
tically Independent
from
t
he No. of revs of
same.
The regulator unit
fitted on this machine
con-
Fig
.
115
83
Advertisement
Table of Contents
