6-30
ES2017-6s
Spec B Generator AC Output Mode
When the engine starts and begins to come up to speed, AC voltage is produced in the battery charge winding B1-B2
(50 Hz only), the quadrature winding Q1-Q2 and in the AC windings T1-T2 (T3-T4 50 HZ). These outputs perform as
follows:
• The battery charge winding B1-B2 is provided on the 50 Hz models only to power battery charger (VR2).
• The quadrature winding Q1-Q2 output voltage is fed to the voltage regulator VR1 where it is rectified into DC
voltage and fed back to the rotor through the brushes to cause further voltage buildup. Voltage buildup is con-
trolled by the voltage regulator that senses the AC output voltage. The regulator continually measures the output
voltage and compares it to an internal reference voltage. When the output voltage exceeds the reference, the
regulator causes the current in the rotor to decrease until the proper voltage is obtained.
• The AC windings T1-T2 provide the output AC voltage (60 Hz models) or T1-T2, T3-T4 (50 Hz models) through
the circuit breaker CB1.
CONTROL
ASSEMBLY A1
VOLTAGE
REGULATOR VR1
J4 CONNECTOR
P4 CONNECTOR
BRUSH
BLOCK
CIRCUIT BREAKER CB1
GND
L1 (LOAD)
L2 (NEUT)
120 VAC
STATOR
CONNECTORS
J1 CONNECTOR
P1 CONNECTOR
BATTERY
BT1
FUSE
F1
START/STOP
SWITCH S1
FIGURE 6-16. SPEC B GENERATOR OUTPUT MODE (60 HERTZ MODEL SHOWN)
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