109
Max. torque
emergency oper.
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The maximum torque during emergency operation is activated through parameter
LF.61. This allows the drive to limit the torque and therefore the output current
to the rated value to prevent the drive from drawing too much current from a
battery back up supply.
Unit: pound feet (lb ft)
Value range: 0.0...torque at the drive’s current limit
Default setting 0.LF.36: For IM: 3 x Rated motor torque
(approx. 3 x LF.17)
For PM: 1.5 x Rated motor torque
(approx. 1.5 x LF.17)
This initial low setting protects the motor from high current in case the
encoder position is wrong. For PM motors to run with 100% load in the
car, it may be necessary to raise this value to 200%...250% of LF.17 based
on the motor manufacturers rated peak torque.
Default setting 1.LF.36 = LF.17
Parameter Description - Control Settings
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