5-42
Motor, Mechanical Axis System, Measuring Systems
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
If the values of the manufacturer’s specification are not available, they can
be determined by measurement by means of approximation:
4
L
4039
0
P
V
U
−
=
−
−
L
U-V
:
inductance of motor between terminals (in mH), third terminal is not
connected
Fig. 5-53:
Approximate calculation for P-0-4039 (in mH)
4
L
4040
0
P
V
U
−
=
−
−
L
U-V
:
inductance of motor between terminals (in mH), third terminal is not
connected
Fig. 5-54:
Approximate calculation for P-0-4040 (in mH)
If a rated voltage and rated frequency have been indicated for the motor,
the magnetizing inductance can be calculated by means of
approximation:
/4
L
f
*
I
*
3
*
*
2
U
4041
0
P
V
U
Nenn
Leer
Nenn
−
−
=
−
−
U
Nenn
:
rms value of the rated voltage (outer conductor voltage)
I
leer
:
rms value of the no-load current in the rated point, alternatively the
magnetization current P-0-4004 (see above)
f
Nenn
rated frequency
L
U-V
:
inductance of motor between terminals (in mH), third terminal is not
connected
Fig. 5-55:
Calculating the value for P-0-4041 (in mH) by means of
approximation
Note:
If the required rated data of the motor are not available, the
magnetizing inductance can also be determined by a no-load
test. With this test the voltage, current and frequency have to
be determined and used for the above formula!
The value of the parameter P-0-0528, Flux control loop proportional gain
is used for controlling the magnetic flux in the asynchronous motor.
(
) (
)
(
)
−
−
−
∗
−
−
+
−
−
+
−
−
∗
−
−
−
−
+
−
−
∗
−
−
+
−
−
∗
=
2
4040
0
P
4039
0
P
4040
0
P
4039
0
P
4041
0
P
4040
0
P
4041
0
P
4039
0
P
4041
0
P
0.4
0528
-
0
-
P
P-0-4041, Motor magnetizing inductance, see previous calculations
P-0-4040, Rotor leakage inductance, see previous calculations
P-0-4039, Stator leakage inductance, see previous calculations
Fig. 5-56:
Value for P-0-0528
list parameter P-0-4042
→
enter the value "1,0" in each of the five lines!
The value for parameter
P-0-4043, Rotor time constant
has to be taken
from the completed form "Output Data for Asynchronous Motors".
If the value is not available, it can be calculated by means of
approximation:
P-0-0528, Flux control loop
proportional gain
P-0-4042, Characteristic of motor
magnetizing inductance
P-0-4043, Rotor time constant
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com