Danfoss VLT AutomationDrive FC 361 Programming Guide

3-41 Ramp 1 Ramp Up Time
Range: Function:
Size
related*
[ 0.01 - 3600
s]
Enter the ramp-up time, that is the
acceleration time from 0 RPM to
the synchronous motor speed n
S
.
Select a ramp-up time which
prevents the output current from
exceeding the current limit in
parameter 4-18 Current Limit during
ramping. The value 0.00
corresponds to 0.01 s in speed
mode. See ramp-down time in
parameter 3-42 Ramp 1 Ramp Down
Time.
Par . 3 − 41 = 
t
acc
 s xn
s
 RPM
ref  RPM
3-42 Ramp 1 Ramp Down Time
Range: Function:
Size
related*
[ 0.01 - 3600
s]
Enter the ramp-down time, that is
the deceleration time from the
synchronous motor speed n
s
to 0
RPM. Select a ramp-down time such
that no overvoltage occurs in the
inverter due to regenerative
operation of the motor, and such
that the generated current does not
exceed the current limit set in
parameter 4-18 Current Limit. The
value 0.00 corresponds to 0.01 s in
speed mode. See ramp-up time in
parameter 3-41 Ramp 1 Ramp Up
Time.
Par . 3 − 42 = 
t
dec
 s xn
s
 RPM
ref  RPM
3-45 Ramp 1 S-ramp Ratio at Accel. Start
Range: Function:
50 %* [ 1 - 99 %] Enter the proportion of the total
ramp-up time (parameter 3-41 Ramp
1 Ramp Up Time) in which the
acceleration torque increases. The
larger the percentage value, the
greater the jerk compensation
achieved, and thus the lower the
torque jerks occurring in the
application.
3-46 Ramp 1 S-ramp Ratio at Accel. End
Range: Function:
50 %* [ 1 - 99 %] Enter the proportion of the total
ramp-up time (parameter 3-41 Ramp
1 Ramp Up Time) in which the
acceleration torque decreases. The
larger the percentage value, the
greater the jerk compensation
achieved, and thus the lower the
torque jerks in the application.
3-47 Ramp 1 S-ramp Ratio at Decel. Start
Range: Function:
50 %* [ 1 - 99 %] Enter the proportion of the total
ramp-down time
(parameter 3-42 Ramp 1 Ramp Down
Time) where the deceleration
torque increases. The larger the
percentage value, the greater the
jerk compensation achieved, and
thus the lower the torque jerks in
the application.
3-48 Ramp 1 S-ramp Ratio at Decel. End
Range: Function:
50 %* [ 1 - 99 %] Enter the proportion of the total
ramp-down time
(parameter 3-42 Ramp 1 Ramp Down
Time) where the deceleration
torque decreases. The larger the
percentage value, the greater the
jerk compensation achieved, and
thus the lower the torque jerks in
the application.
Parameter Descriptions Programming Guide
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Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English