Miller 819A, Техническое руководство

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TM-4414 Page 9 Belt/Hydraulic-Drive Generator
1 Engine
Supplies force to turn revolving
field (rotor).
2 Revolving Field (Rotor)
Turns at 3000 rpm (50 Hz) or 3600
rpm (60 Hz). The speed and excita-
tion current of the field coils deter-
mine voltages in stator windings.
3 Stator Windings
Supply power to exciter and gener-
ator power circuits.
4 Power Board PC1
Works with PC2 to adjust output by
changing revolving field current af-
ter comparing feedback from PC2
to generator open-circuit voltage.
Uses current feedback signal for
current limiting circuit to prevent ro-
tor failure from overheating.
5 Control Board PC2
Works with PC1 to regulate revolv-
ing field current. The PWM (pulse
width modulation) signal originates
on PC2 and is sent to PC1.
6 Generator Power Circuit
Breaker CB1
Protects the generator windings
from overload.
7 Terminal Block TE1
Provides connection point for cus-
tomer supplied equipment and re-
ceptacles.
SECTION 6 − 7.5 kW MODELS THEORY OF OPERATION
Revolving
Field
(Rotor)
Exciter
Stator Windings
Generator Power
2 1 3
Power
Board
PC1
6
7
4
V
oltage Feedback Signal
Excitation DC Supply
Engine
Circuit
Breaker
CB1
Terminal
Block
TE1
Control
Board
PC2
5
+12 Volt DC Input Voltage
(Customer-Supplied)
AC Or DC Control Circuits
Mechanical Coupling
Generator Output
Magnetic Coupling