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DIAGRAMS & DRAWINGS
4.10 WIRING DIAGRAM ELECTRONIC GOVERNOR (STANDARD FOR W-SQ6, 8 AND 12)
Fig. 43: Electronic governor
In addition to the mechanical governor, the W-SQ6, 8 and
12 are standard equipped with an electronic governor. A
governor keeps the speed (RPM=Rotations Per Minute) of
the engine at a fixed value. The RPM of the engine
correlates with the frequency of the electrical output (3000
RPM =50 Hz) of the alternator.
Under full load the RPM of the models that have only a
mechanical governor can drop 75 RPM (=2.5 Hz) at full
load and will go further down or collapse when further
loaded. However the engines with the electronic governor
will keep the RPM and frequency at the set value. As the
voltage is related to the frequency, the voltage will be
more stable as well.
The RPM represents power and the alternator performs
better as well on a higher speed. Models with an electronic
governor will bring more power.
So the electronic governor offers three advantages: a
more stable frequency and voltage and more power.
The electronic governor system contains two parts:
42
1
The actuator controls the engine speed. This actuator
replaces the standard hold solenoid that is on all other
mechanical controlled WhisperPower engines. The
actuator controls the RPM directly on the fuel rack
inside the fuel pump without levers and other
mechanical transmissions.
2
A microprocessor keeps the speed at the set value by
controlling the actuator. The microprocessor is
programmed at the WhisperPower factory and many
parameters are set to perform well. It should not be
necessary to make adjustments. When adjustments
are necessary this can only be done with the help of
an interface to a computer and special software to get
access to the microprocessor.
The WhisperPower electronic governor does not need a
pickup device in the flywheel housing that counts the
passing tooth of the flywheel and determines the exact
RPM of the engine, because the processor uses the 50 Hz
of the AC output voltage as a reference.
December 2016 / W-SQ6/8/12/16 for mobile applications / EN
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