Danfoss VACON 100 FLOW Series Application Manual page 170

VACON® 100 FLOW
Application Guide
The drive can trip when the overvoltage and undervoltage controllers are disabled.
11.3.2.8 (ID 666) Energy Optimization
Location in the menu: P3.1.2.12
Use this parameter to enable the Energy Optimization function. To save energy and to lower the motor noise, the drive searches for
the minimum motor current. Use this function, for example in fan and pump processes. Do not use the function with fast PID con-
trolled processes.
11.3.2.9 (ID 659) Stator Voltage Adjust
Location in the menu: P3.1.2.13
Use this parameter to adjust the stator voltage in permanent magnet motors.
The identification run sets a value for this parameter automatically. We recommend the identification run, if it is possible. Make
the identification run with the parameter P3.1.2.4.
It is possible to use this parameter only when the parameter P3.1.2.2 Motor Type has the value PM motor. If induction motor is
selected as the motor type, the value is automatically set to 100%, and the value cannot be changed.
When changing the value of P3.1.2.2 (Motor type) to PM Motor, the parameters P3.1.4.2 (Field Weakening Point Frequency) and
P3.1.4.3 (Voltage at Field Weakening Point) increase automatically to be equal with output voltage of the drive. The set U/f ratio
does not change. This is done to prevent the operation of the PM motor in the field weakening area. The nominal voltage of the PM
motor is much lower than the full output voltage of the drive.
The nominal voltage of the PM motor agrees to the back EMF voltage of the motor at nominal frequency. But in a different motor
manufacturer, it can be equal to, for example, the stator voltage at nominal load.
Stator Voltage Adjust helps to adjust the U/f curve of the drive near the back EMF curve. It is not necessary to change the values of
many U/f curve parameters.
The parameter P3.1.2.13 gives the output voltage of the drive in percentage of the nominal voltage of the motor at the nominal
frequency of the motor. Adjust the U/f curve of the drive above the back EMF curve of the motor. The motor current increases the
more the U/f curve is different from the back EMF curve.
Field Weakening
Point Voltage
Motor Nominal
Voltage
Zero Frequency
Voltage
Illustration 36: The Stator Voltage Adjustment
170 | Danfoss A/S © 2023.08
N O T I C E
N O T I C E
U [V]
Stator Voltage Adjust
Motor Nominal
Frequency
(50...200%)
Field
Weakening
Point
Parameter Descriptions
f [Hz]
AB298035655957en-000201 / DPD01083