Danfoss VACON 100 FLOW Series Application Manual page 173

VACON® 100 FLOW
Application Guide
U[V]
Un
ID603
A
ID605
P2
ID606
P1
ID604
Illustration 38: The Programmable U/f Curve
A Default: Nominal voltage of the motor
B Field weakening point
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
11.3.4.2 (ID 602) Field Weakening Point Frequency
Location in the menu: P3.1.4.2
Use this parameter to set the output frequency at which the output voltage reaches the field weakening point voltage.
11.3.4.3 (ID 603) Voltage at Field Weakening Point
Location in the menu: P3.1.4.3
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 setting 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
setting the parameters P3.1.1.1 and P3.1.1.2.
11.3.4.4 (ID 604) U/f Midpoint Frequency
Location in the menu: P3.1.4.4
Use this parameter to set the middle point frequency of the U/f curve.
This parameter gives the middle point frequency of the curve if the value of P3.1.4.1 is programmable.
Danfoss A/S © 2023.08
P3
B
C
f[Hz]
ID602
C Default: Nominal frequency of the motor
N O T I C E
Parameter Descriptions
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