Rockwell Automation 1560E SMC Flex Smart Motor Controller - Manual (Page 14)

1-4 Product Overview
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Starting Modes (cont.) Selectable Kickstart :
Selectable kickstart provides a power boost at start-up that is user-adjustable
from 0 to 90% of locked rotor torque. The additional power helps motors
generate higher torque to overcome the resistive mechanical forces of some
applications when they are started. The selectable kickstart time is user-
adjustable from 0.0 to 2.0 seconds.
Initial
Torque
Time (seconds)
Start Run
100%
Kickstart
Initial
Torque
Time (seconds)
Start Run
100%
Kickstart
Figure 1.2 – Selectable Kickstart
Current Limit Start ;
This starting mode provides a true current limit start that is used when
limiting the maximum starting current is necessary. The Current Limit level
is user-adjustable from 50% to 600% of the motor's full-load ampere rating,
and the current limit time is user-adjustable from 0 to 30 seconds. Once the
MV SMC-Flex™ controller senses that the motor has reached the up-to-
speed condition during the current limit starting mode, the output voltage
automatically switches to full voltage and the bypass contactor is closed.
600%
50%
Percent Full
Load Current
Time (seconds)
Start
600%
50%
Percent Full
Load Current
Time (seconds)
Start
Figure 1.3 – Current Limit Start
: Kickstart is also available with Current Limit Start, Dual Ramp Start and Linear Acceleration.
; The Current Limit Start mode design is based on a motor with a locked-rotor current rating that is 600% of
the full-load current rating.