HEIDENHAIN MANUALplus 620 Technical Manual page 863

Setting the
reduction of the
magnetization
current
January 2012
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
Note
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.
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.
6.16 The Control Loop 863