Description of parameters
vacon • 23
24-hour s358 (0)40 837 1150 • Email: [email protected]
Figure 1. Linear and squared change of motor voltage
Programmable U/f curve:
2
The U/f curve can be programmed with three different points. Programmable
U/f curve can be used if the other settings do not satisfy the needs of the
application.
Figure 2. Programmable U/f curve
Linear with flux optimisation:
3
The frequency converter starts to search for the minimum motor current in
order to save energy, lower the disturbance level and the noise. This function
can be used in applications with constant motor load, such as fans, pumps
etc.
109
U/f
optimisation
(2.1.13)
Automatic
torque boost
The voltage to the motor changes automatically which makes the motor
produce sufficient torque to start and run at low frequencies. The voltage
increase depends on the motor type and power. Automatic torque boost
can be used in applications where starting torque due to starting friction
is high, e.g. in conveyors.
Un
ID603
U[V]
f[Hz]
NX12K07
Default: Nominal
voltage of the motor
Linear
Squared
Field weakening
point
Default: Nominal
frequency of the
motor
Un
ID603
ID602
U[V]
f[Hz]
NX12K08
ID604
(Def. 5 Hz)
ID605
(Def. 10%)
ID606
(Def. 1.3%)
Default: Nominal
voltage of the motor
Field weakening point
Default: Nominal
frequency of the motor
