Hobart 120CU20, Руководство по эксплуатации и техническому обслуживанию с иллюстрированным списком запасных частей

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OM-2228 / Operation and Maintenance Manual
120CU20 / Series 500120 / 400 Hz. Generator Set
October 15, 2013 Chapter 1-1
Page 11
Figure 4: Air Cleaner and Service Indicator
f) Generator.
The 400 Hz generator is a brushless, revolving field, three-phase, alternating current type. The
generator set covered by this manual is a dual-bearing type. The front end of the rotor shaft extends
forward beyond the front bearing and is attached to the engine flywheel by a flexible coupling
assembly. The rear end of the rotor shaft extends rearward beyond the rear bearing and into the
exciter stator housing. The exciter rotor is mounted on this shaft extension with a key and is secured
by a washer and 1/2-13 thread cap screw. A rectifier with six diodes is mounted on the exciter rotor
and converts exciter AC output to DC for excitation of the generator revolving fields. The exciter DC
output to the generator fields, and consequently the generator output, is controlled voltage regulator
PC board (REG). A centrifugal, radial-blade fan, which is part of the flexible coupling assembly,
draws cooling air over all internal windings. Air enters at the exciter end and is discharged at the
drive end. The complete generator assembly is bolted to the engine flywheel housing.
8) Control Box Assembly.
The control box is a sheet metal enclosure that houses and provides mounting facilities for engine and
generator controls and monitoring equipment.
a) Operator Controls.
The control system is divided into three sections. On the left side of the control panel, as one faces it,
are engine meters. On the right side of the control panel are generator meters. Below the control
panel are push-button switches for operating the engine and generator.
Air Cleaner
Service Indicator