Kubota 05 Series - ELECTRICAL SYSTEM; [1] CHARGING SYSTEM

DIESEL ENGINE
05 SERIES WSM, 01640
ELECTRICAL SYSTEM
[I] CHARGING SYSTEM
(1) Alternator
~01640F10160 I
(2) IC Regulator
!
I -1.
&.
l1640F10170
A compact alternator with an IC regulator is used,
having the following characteristics:
Approximately 26 % lighter and 17 % smaller than a
standard alternator.
Cooling performance and safety have been improved
by combining the cooling fan with the rotor and
incorporating the fan
/ rotor unit inside the alternator.
IC regulator is fitted inside the alternator.
The rectifier, IC regulator and similar components are
easy to remove, making
it easier to service the
alternator.
01 640M90010
An IC regulator uses solid state transistors, chips or
othere semiconductor elements instead of the relays in a
conventional regulator. Stable characteristics are
achieved by cutting
off the field current.
IC regulators have the following characteristics:
0 The control voltage does not change over time, so
the need for readjustment is eliminated. Since there
are no moving parts,
IC regulators are extremely
durable and resistant
to vibration.
The overheat compensation characteristics ensure
that the control voltage is reduces as the temperature
rises,
so the battery is charged at just the right level.
The internal circuitry of the
IC regulator is shown in
the diagram.
It consists of a hybrid IC incorporating a
monolighic IC. (The internal circuitry of the monolithic IC
is extremely complex, so it is shown as simply “M.IC
circuit”.
Tri acts as the contacts controlling the field current,
and
Trr acts as the charge lamp relay controlling the
flashing of the charge lamp.
The
M.IC circuit controls Tri and Trz, and monitors
the alternator output voltage, and detacts any drop
in L
terminal voltage or breaks in the rotor coil.
(1) IC Regulator
01 640M90020
M-41
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