OPERATION
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18735.
A
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2
1. Constant Acceleration
2.
Start Ramp Time
(parameter 2B)
Time
•
Fine-tuning Adaptive Control
If the motor does not start or stop smoothly, adjust the adaptive control gain
(parameter 2I). The gain setting determines how much the EMX4e will adjust future
adaptive control starts and stops, based on information from the previous start. The
gain setting affects both starting and stopping performance.
•
If the motor accelerates or decelerates too quickly at the end of a start or
stop, increase the gain setting by 5%~10%.
•
If the motor speed fluctuates during starting or stopping, decrease the
gain setting slightly.
NOTE
The EMX4e tunes Adaptive Control to match the motor. Changing the
following parameters will reset Adaptive Control and the first start/stop
cycle will use constant current start/timed voltage ramp stop: 1B
Motor Full
Load Current
, 2D
Current Limit
, 2I
Adaptive Control Gain
.
8.7
Stop Methods
Coast to Stop
Coast to stop lets the motor slow at its natural rate, with no control from the soft
starter. The time required to stop will depend on the type of load.
Timed Voltage Ramp Soft Stop
Timed voltage ramp stopping reduces the voltage to the motor gradually over a
defined time. This can extend the stopping time of the motor and may avoid
transients on generator set supplies.
NOTE
The load may continue to run after the stop ramp is complete.
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EMX4e User Manual (710-18433-00C)
