Functions, monitoring, and protective functions
9.2 Drive functions
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
479
Due to the higher accuracy, the magnetization characteristic should, if possible, be
determined during rotating measurement (without encoder: p1960 = 1, 3; with encoder:
p1960 = 2, 4). If the drive is operated in the field-weakening range, this characteristic should
be determined for vector control in particular. The magnetization characteristic can be used
to calculate the field-generating current in the field-weakening range more accurately,
thereby increasing torque accuracy.
Note
Results of the rotating measurement
In comparison with standstill measurement (p1910) for induction motors, rotating
measurement (p1960) allows the rated magnetization current and saturation characteristic to
be determined more accurately.
Figure 9-2 Magnetization characteristic
Carrying out motor identification
● Enter p1910 > 0. Alarm A07991 is displayed.
● Identification starts when the motor is switched on.
● p1910 resets itself to "0" (successful identification) or
fault F07990 is output.
● r0047 displays the current status of the measurement.
Note
Non-volatile saving
To set the new controller setting permanently, the data must be saved with p0977 or p0971
in a non
-volatile memory.
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