Mech.Brake
GainBoost
Relay
Torqueref.
MotorSpeed
Premag Torque Ramp
Time
p. 2-27
Torque Ref. 2-26
Gain Boost Factor
p. 2-28
Brake
Release
Time
p. 2-25
Ramp 1 upp. 3-41 Ramp 1 downp. 3-42 Stop
Delay
p. 2-24
Activate
Brake
Delay
p. 2-23
1 2 3
130BA642.12
II
I
Figure 3.34 Brake Release Sequence for Hoist Mechanical Brake Control
I) Activate brake delay: The adjustable frequency drive starts again from the mechanical brake engaged position.
II) Stop delay: When the time between successive starts is shorter than the setting in 2-24 Stop Delay, the adjustable
frequency drive starts without applying the mechanical brake.
For an example of advanced mechanical brake control for hoisting applications, see.
Product Introduction Design Guide
58 Danfoss A/S © Rev. 2014-02-10 All rights reserved. MG34S222
33
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