ENGINE
WG972-E4, WSM
1-M25
D2 Type Regulator
IC regulator has a special feature that makes it possible to interrupt field current by using the transistor or IC
instead of the contact-point-type regulator.
IC regulator has the special features as follows:
1. Readjustment for this regulator is unnecessary because the control voltage does not change over time. Further,
vibration-proof property and durability is excellent because IC regulator has no moving parts.
2. Since IC regulator has over-temperature compensation property, which makes the control voltage low if the
temperature is increased, it makes it possible to properly charge the batteries.
The circuit inside IC regulator is as shown in the following figure.
It consists of the monolithic IC-incorporated hybrid IC. (Since the inside circuit of the monolithic IC is extremely
complex, it is described as M.IC circuit.)
Tr1 has the function as the contact point to control field electrical current, and as the charging lamp relay to light
the charging lamp.
M.IC controls Tr1 and Tr2 by detecting decrease of the output voltage of alternator, decrease of the L terminal
voltage, disconnection of the rotor coil, etc.
9Y1211108ENM0045US0
Charge Light Control
Turns the charge light ON and OFF in accordance with alternator power generation.
9Y1211108ENM0046US0
Specification of Alternator with IC (Incorporated with) Regulator
Generating capacity will be determined by rpm of engine and pulley ratio.
9Y1211108ENM0047US0
(1) Alternator Assembly
(2) IC Regulator
(3) Key Switch
Nominal voltage 12 V
Maximum output 40 A, 60 A
Rotational direction Right as seen from pulley side
Armature wiring 3 phase, Y wiring
Rectifying system Total wave rectification
min
-1
(rpm) at no load (when cold) 13.5 V at 0 A 1050 to 1350 min
-1
(rpm)
min
-1
(rpm) at max. output (when cold) 13.5 V at maximum output below 4000 min
-1
(rpm)
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