Ac Regulator; Triple Phase Full-Wave Rectifier; Triple Phase Full-Wave Rectifiers With Field Coils - Honda Motorcycle Service Manual

BATTERlESlCHARGlNGlLlGHTlNG SYSTEM
AC Regulator
Most medium engine displacement motorcycles have indepen-
dent lighting and charging coils. For these models, the lighting
coil has its own independent AC regulator. The regulator
detects the AC voltage of the lighting coil inside the
regulatorlrectifier and shorts out all excessive output.
There are regulators which regulate both positive and negative
outputs and ones which regulate negative output only.
Since these regulators have lighting and charging coils that
operate independently, even if one of the coils does not work.
the other is not affected.
Triple Phase Full-Wave Rectifier
This type is mainly used in medium and large engine displace-
ment models. The rectifier is connected directly to the three
phase alternator. This circuit has no lighting coil but instead,
the battery feeds DC current to the lighting system.
LIGHT SWITCH
-
T
VOLTAGE
FEEDBACK LINE
VOLTAGE
REGULATORIRECTIFIER
:REGULATOR:
. .
The rectified waveform of the triple phase AC output is more
stable than the single phase AC type.
RECTIFI-
-
Triple Phase Full-Wave Rectifiers With Field Coils
This type regulates the alternator output using the current
flowing through the field coil. The regulatorlrectifier has a
voltage regulator for the field coil. The voltage regulator
detects the voltage at the battery and feeds current to the
base of a transistor, turning it ON. When the transistor is ON,
the battery feeds current through the ignition switch
+
field
coil - transistor
-)
ground. The field coil magnetizes the
rotor, and the alternator generates power.
When the alternator reaches a certain voltage, the voltage
regulator turns off the transistor and cuts off current to the
field coil, hence the alternator stops generating power.
IGNITION SWITCH
AL
FI
22-20
Date of issue: March.1995
0
HONDA MOTOR CO.,LTD.