Magnetizing Current; Rated Slip Correction Factor - BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual

10.2.3 Magnetizing Current

The
Rated magnetizing current
the voltage which is present at the machine in no-load condition depending on the
speed. The guided commissioning determines this value at about 30% of the
371. This current can be compared to the field current of an externally excit-
current
ed direct current machine.
In order to optimize the sensorless field-oriented control system, the machine must
be operated without load at a rotational frequency which is below the
375. The accuracy of the optimization increases with the adjusted
cy
400 and when the drive is in no-load operation. The flux-forming actual cur-
quency
rent value
716.
current
The field-orientated control with speed sensor feedback uses the parameterized
ed magnetizing current
The dependence of the magnetizing on the frequency and voltage at the correspond-
ing operating point in question is taken into account by a magnetizing characteristic.
The characteristic is calculated via three points, in particular in the field weakening
area above the rated frequency. The parameter identification has determined the
magnetizing characteristic and set the parameters
Magnetizing current 80%
No.
713 Magnetizing current 50%
714 Magnetizing current 80%
715 Magnetizing current 110%
716 Rated magnetizing current

10.2.4 Rated slip correction factor

The rotor time constant results from the inductivity of the rotor circuit and the rotor
resistance. Due to the temperature-dependence of the rotor resistance and the satu-
ration effects of the iron, the rotor time constant is also dependent on temperature
and current. The load behavior and thus the rated slip depend on the rotor time con-
stant. The guided commissioning determines the machine data during the parameter
identification and sets the parameter
For the fine adjustment or a check of the rotor time constant, proceed as follows:
Load the machine at fifty percent of the
must be approximately fifty percent of the
ance of 5 %. If this is not the case, the correction factor must be changed according-
ly. The larger the correction factor is set, the stronger the voltage drop when the ma-
chine is loaded. The value calculated by the rotor time constants can be read out via
the actual value
a winding temperature which is also reached during normal operation of the motor.
No.
718 Rated slip correction factor
Operating Instructions ACU
06/13
716 is a measure of the flux in the motor and thus of
215 to be read out should roughly match the set
Isd
716 for the flux in the motor.
714 and
Parameter
Description
Current rotor time constant
Parameter
Description
Magnetizing current 50%
Magnetizing current 110%
Settings
Min.
1.00 % 50.00 %
1.00 % 80.00 %
110.00 % 197.00 %
0.01⋅I
FUN
Rated slip correction factor
375. As a result, the voltage
Rated frequency
370, with a maximum toler-
Rated voltage
227. The adjustment should be done at
Min.
0.01 % 300.00 %
Rated
Rated frequen-
Switching fre-
Rated magnetizing
Rat-
713,
715.
Max. Fact. sett.
31.00 %
65.00 %
145.00 %
ü ⋅ I 0.3⋅I
FUN FUN
718 accordingly.
Settings
Max. Fact. sett.
100.00 %
125