Danfoss VLT AutomationDrive FC 301 Design Manual page 44

Product Features
Motor
Speed
4 4
Torque
Ref.
Brake
Relay
High
Low
Mech Brake
Feedback
High
Low
Open
Mech Brake
Position
Closed
Gain Boost or
Postion Control
Illustration 4.3 Brake release sequence for hoist mechanical brake control. This brake control is available in FLUX with motor
feedback only, available for asynchronous and non-salient PM motors.
2-26 Torque Ref to 2-33 Speed PID Start Lowpass Filter Time
are only available for the hoist mechanical brake control
(FLUX with motor feedback). 2-30 Position P Start Propor-
tional Gain to 2-33 Speed PID Start Lowpass Filter Time can
be set up for very smooth transition change from speed
control to position control during 2-25 Brake Release Time -
the time when the load is transferred from the mechanical
brake to the frequency converter.
2-30 Position P Start Proportional Gain to 2-33 Speed PID
Start Lowpass Filter Time are activated when 2-28 Gain
Boost Factor is set to 0. See Illustration 4.3 for more
information.
NOTICE
For an example of advanced mechanical brake control
for hoisting applications, see chapter 10 Application
Examples.
42
Torque Ramp Brake Release
Up Time Time
p. 2-27 p. 2-25
Torque Ref. p. 2-26
W22
Active
Contact no.1
E.g. DI32 [70] Mech. Brake Feedback
Contact no.2
OPTIONAL
E.g. DI33 [71] Mech. Brake Feedback
Gain Boost. p. 2-28
®
VLT AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
Ramp 1 Up
P. 3-41
A22
Active
MG33BF02 - Rev. 2013-12-20
Ramp 1 Down Stop Delay Activate Brake
P. 3-42 P. 2-24 Delay
P. 2-23
A22
Active
Torque Ramp
Down Time
p. 2-29
W22
Active