January 2012 6.16 The Control Loop 863
MP_iCtrlMotVRedFact
Factor for the reduction of the magnetization current during idle
running (only as of CC 61xx)
Available from NCK software version: 597 110-01.
Format: Numerical value
Input: 0 to 60 [%]
0: Function inactive
Default: No value, parameter optional
Access: LEVEL3
Reaction: RUN
Setting the
reduction of the
magnetization
current
If thermal problems arise on an asynchronous spindle with no load during
weakened-field operation, and these problems cannot be traced to an overload
or other mechanical problems, then please reduce the magnetization current
as follows:
Reduce the nominal voltage in steps of 10% in MP_iCtrlMotRedFact
Reduce MP_iCtrlMotRedFact until a stable temperature within the motor
specifications is reached when there is no load.
Please note that the reduction of the magnetization current can lead to a
limitation of the drive’s dynamics. However, this depends on the drive, and
must be judged separately in each case.
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