Bosch PIN8 N1 Guia de Resolução de Problemas Página 166

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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 manufacturers specification are not available, they can
be determined by measurement by means of approximation:
4
L
40390P
VU
=
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
40400P
VU
=
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:
/4L
f*I*3*
*2
U
40410P
VU
NennLeer
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
40400P40390P40400P40390P40410P
40400P40410P40390P40410P
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
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