Synchronous Motor (Sm): Compensate Temperature And Current Influences - Lenze i950 Commissioning Manual

Configuring the motor control
Fine adjustment of the motor model

Synchronous motor (SM): Compensate temperature and current influences

13.7.2 Synchronous motor (SM): Compensate temperature and current influences
The properties of the permanent magnets of permanently excited synchronous motors
depend on the temperature and the amperage. The relationship between motor current and
resulting torque changes correspondingly.
The influences of the temperature and the amperage on the magnetisation can be taken into
account by the motor control and hence be compensated for.
To compensate for the temperature dependence of the magnets, the temperature coeffi-
•
cient (kT) of the permanent magnet must be entered in object
teristic).
To compensate for the current dependence of the magnets, multiple grid points of a char-
•
acteristic must be entered in the following object (non-linear characteristic):
Parameter
Address Name / setting range / [default setting]
0x2C06:001 Grid points for magnet characteristic (current): x1 =
i01/iN
0 ... [0] ... 1000 %
0x2C06:002 Grid points for magnet characteristic (current): y1 =
kT01/kTN
0 ... [100] ... 1000 %
0x2C06:003 Grid points for magnet characteristic (current): x2 =
i02/iN
0 ... [100] ... 1000 %
0x2C06:004 Grid points for magnet characteristic (current): y2 =
kT02/kTN
0 ... [100] ... 1000 %
0x2C06:005 Grid points for magnet characteristic (current): x3 =
i03/iN
0 ... [200] ... 1000 %
0x2C06:006 Grid points for magnet characteristic (current): y3 =
kT03/kTN
0 ... [100] ... 1000 %
0x2C06:007 Grid points for magnet characteristic (current): x4 =
i04/iN
0 ... [415] ... 1000 %
0x2C06:008 Grid points for magnet characteristic (current): y4 =
kT04/kTN
0 ... [72] ... 1000 %
256
0x2C03:003 (linear charac-
Info
Characteristic for the dependency of the magnetic flux on the active
motor current.