Vacon 100 flow, Руководство по применению, Страница: 226 / 386

C
B A
P1
P2
P3
ID604
ID605
ID606
Un
ID603
ID602
U[V]
f[Hz]
Fig. 39: The programmable U/f curve
A. Default: Nominal voltage of the motor
B. Field weakening point
C. Default: Nominal frequency of the motor
When the parameter Motor Type has the value PM motor (Permanent Magnet Motor), this
parameter is automatically set to the value Linear.
When the parameter Motor Type has the value Induction Motor, and when this parameter is
changed, these parameters are set to their default values.
•
P3.1.4.2 Field Weakening Point Frequency
•
P3.1.4.3 Voltage at Field Weakening Point
•
P3.1.4.4 U/f Midpoint Frequency
•
P3.1.4.5 U/f Midpoint Voltage
•
P3.1.4.6 Zero Frequency Voltage
P3.1.4.2 FIELD WEAKENING POINT FREQUENCY (ID 602)
Use this parameter to set the output frequency at which the output voltage reaches the field
weakening point voltage.
P3.1.4.3 VOLTAGE AT FIELD WEAKENING POINT (ID 603)
Use this parameter to set the voltage at the field weakening point as a percentage of the
motor nominal voltage.
Above the frequency at the field weakening point, the output voltage stays at the set
maximum value. Below the frequency at the field weakening point, the U/f curve parameters
control the output voltage. See the U/f parameters P3.1.4.1, P3.1.4.4 and P3.1.4.5.
When you set the parameters P3.1.1.1 (Motor nominal voltage) and P3.1.1.2 (Motor nominal
frequency), the parameters P3.1.4.2 and P3.1.4.3 automatically receive related values. To
have different values for P3.1.4.2 and P3.1.4.3, change these parameters only after you set
the parameters P3.1.1.1 and P3.1.1.2.
VACON · 226 PARAMETER DESCRIPTIONS
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