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Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
244
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
7.9.5
Load torque monitoring (system protection)
In many applications, it is advisable to monitor the motor torque:
●
Applications where the load speed can be indirectly monitored by means of the load
torque. For example, in fans and conveyor belts too low a torque indicates that the drive
belt is torn.
●
Applications that are to be protected against overload or locking (e.g. extruders or
mixers).
●
Applications in which no-load operation of the motor represents an impermissible
situation (e.g. pumps).
Load torque monitoring functions
The converter monitors the torque of the motor in different ways:
1.
No-load monitoring:
The converter generates a message if the motor torque is too low.
2.
Blocking protection:
The converter generates a message if the motor speed cannot match the speed setpoint
despite maximum torque.
3.
Stall protection:
The converter generates a message if the converter control has lost the orientation of the
motor.
4.
Speed-dependent torque monitoring
The converter measures the actual torque and compares it with a parameterized
speed/torque characteristic.
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Содержание SINAMICS G120 CU230P-2
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