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Appendix B
CGCM-DLR Unit Math Models
Soft Start Control
202
The soft start control function is provided to cause orderly build-up of terminal
voltage from the residual voltage to the rated voltage in desired time with
minimal overshoot. In CGCM-DLR units, the fast dynamic response is used
while the voltage reference is adjusted based on the elapsed time. When the
system is under start-up condition, the voltage reference is adjusted by the
amount calculated based on two programmable parameters, initial soft-start
voltage level (V
), and desired time (T
O
mathematical model is shown in Soft Start Control. The soft start gain (K
calculated by using this formula.
K
= (V
- V
SS
REF
O
Figure 68 - Soft Start Control
Time From Start
Rockwell Automation Publication 1407-UM002B-EN-P - February 2019
) to build up to the rated voltage. Its
SS
) / T
SS
) is
SS
AVR
Summing
Point
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