KEB COMBIVERT F5, Справочное руководство, Страница: 194 / 349

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LC - Control Setting Parameters
The maximum torque setting is used to limit the output current. For induction
motors, the limit prevents the motor from exceeding its breakdown torque limit.
If the maximum torque setting is reached, the corresponding output current
will be limited which may cause the acceleration process to take longer or
stall with a full load or may also cause the car to overshoot the
floor during
deceleration.
Default Setting: 150%
The maximum output current is then limited to the following:
Max Current = (LC30 Maximum Torque / 100 ) X LM03 Motor Current
The maximum output current is ultimately limited to the drive’s peak
current rating, regardless of how high the LC30 Maximum Torque may
be set. Refer to Sections 2.4 and 2.5 for ratings.
The low default setting is to protect the motor from excessively high
current which may occur during the commissioning process if there
are incorrect parameter settings (e.g. motor data incorrect, encoder
A/B phasing or ppr incorrect, encoder position for PM synchronous
motor incorrect, etc.). The default setting should be sufficient to enable
inspection operation with empty car. Under normal high speed operation,
this value will likely need to be increased, typically in the range of 200-
250% of rated motor torque.
The reduced maximum torque limit is activated when using an LI04-LI11 input
assigned as Reduced Torque (2). This allows the drive to limit the torque and
therefore the output current to prevent the drive from drawing too much current
from a battery back up supply.
Default Setting: 100%
LC30
Maximum Torque
i

LC31
Reduced Maximum
Torque