Field Current Regulator - Allen-Bradley 1407-CGCM User Manual

CGCM Unit Math Models
Per-unit Block Diagram for Rotating Rectifier Excitation System shows the
model of the CGCM field current regulator used with a brush-type rotating
exciter. V is the input from the power source for the excitation system.
P
Typical value for T is 0. The forcing limit V is related to the power-input
A RLMT
voltage (V ) to the CGCM, the exciter field voltage (V ) and the programmed
P R
gain (K ) in this equation.
G
V = 1.4*V / V
RLMT P R
The gain K is used for compensating variations in system configuration
G
dependent gains such as power input voltage.
The PI gains K and K are the same as the PI gains K and K for the voltage
P I P I
regulator. The PID gains can be obtained from the PID Calculator software
available from Rockwell Automation.
Rockwell Automation Publication 1407-UM001H-EN-P - November 2014