130BA642.12
A22
Active
W22
Active
W22
Active
A22
Active
High
Low
High
Low
Open
Closed
Motor
Speed
Torque
Ref.
Brake
Relay
Mech Brake
Feedback
Gain Boost or
Postion Control
Mech Brake
Position
Activate Brake
Delay
P. 2-23
Torque Ramp
Down Time
p. 2-29
Stop Delay
P. 2-24
Ramp 1 Down
P. 3-42
Ramp 1 Up
P. 3-41
Brake Release
Time
p. 2-25
Torque Ramp
Up Time
p. 2-27
Contact no.2
OPTIONAL
E.g. DI33 [71] Mech. Brake Feedback
Contact no.1
E.g. DI32 [70] Mech. Brake Feedback
Gain Boost. p. 2-28
Torque Ref. p. 2-26
Illustration 3.20 Brake Release Sequence for Hoist Mechanical Brake Control
to
parameter 2-33 Speed PID Start
are only available for the hoist
mechanical brake control (flux with motor feedback).
2-26 Torque Ref
Range:
Function:
0 %
*
[ -300 -
300 %]
The value defines the torque applied against the
closed mechanical brake before release.
The torque/load on a crane is positive and is 10–
160%. To obtain the best starting point, set
to approximately 70%.
The torque/load on a lift can be both positive
and negative and between -160% and +160%. To
obtain the best starting point, set
to 0%.
The higher the torque error is
(
vs. actual torque), the
more movement during load takeover.
2-27 Torque Ramp Up Time
Range:
Function:
0.2 s
*
[0 - 5 s] The value defines the duration of the torque
ramp in clockwise direction. Value 0 enables
very fast magnetization in flux control principle.
2-28 Gain Boost Factor
Range:
Function:
1
*
[0 -
4 ]
Only active in flux closed loop. The function ensures
a smooth transition from torque control mode to
speed control mode when the motor takes over the
load from the brake.
Increase to minimize the movement. Activate the
advanced mechanical braking (
parameter group 2-3*
Adv. Mech Brake
) by setting
to 0.
2-29 Torque Ramp Down Time
Range:
Function:
0 s
*
[0 - 5 s]
Torque ramp-down time.
3.3.5 2-3* Adv. Mech Brake
Parameter 2-30 Position P Start Proportional Gain
to
parameter 2-33 Speed PID Start Lowpass Filter Time
can be
set up for very smooth transition change from speed
control to position control during
parameter 2-25 Brake
Release Time
- the time when the load is transferred from
the mechanical brake to the frequency converter.
Parameter 2-30 Position P Start Proportional Gain
to
parameter 2-33 Speed PID Start Lowpass Filter Time
are
activated when
parameter 2-28 Gain Boost Factor
is set to 0.
See
for more information.
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
74
Danfoss A/S © 10/2018 All rights reserved.
MG33MP02
3
3
Summary of Contents for VLT AutomationDrive FC 302
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