Wanco AB Series, Owner'S Manual

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2 Owner’s Manual
Wanco Two-Bearing Belt-Drive Generators
1.2 Principle of operation
1.2.1 AB- and AR-Series
On AB- and AR-Series generators, the generator stator and the main
phase output winding have an auxiliary phase winding that is
connected to a capacitor.
The resultant current flow creates an alternating armature reaction
that can be considered the combination of two rotating fields. One
field is in the direction of the generator rotation at the same speed;
the other is in the opposite direction, and induces in the rotor field
winding an electromagnetic field that is double the rated
frequency.
By connecting a diode in series with the rotor field winding, the
current is rectified and the necessary excitation is obtained.
The voltage regulation at load is ensured by the field build-up
generated by the armature reactance and the rotating field
windings.
1.2.2 EC-Series
All EC-Series generators are 12-wire brushless generators with an
exciter generator that induces a voltage in the main generator. An
automatic voltage regulator is connected to the main generator
and controls the output voltage of the generator.
EC-Series generators are 3-phase wound generators that are
reconnected for single-phase applications. They can operate at 60
hertz and 1800 RPM or 50 hertz and 1500 RPM with reconnections.
All EC-Series generators can operate in bidirectional rotation
(clockwise or counterclockwise). They can function as prime power
with 24-hour continuous operation.