H-53 Model Shift Frequency
Range:
Function:
Illustration 3.28 H-40 = [1] Speed closed loop or
[2] Torque and H-41 = [3] Flux w/motor
feedback
Variable Current - Flux model - Sensorless
This model is used when H-40 is set to
[0]Speed
open loop
and H-41 is set to
[2] Flux sensorless
.
In speed open loop in flux mode, the speed is
determined from the current measurement.
Below f
norm
x 0.1, the drive runs on a Variable
Current model. Above f
norm
x 0.125 the frequency
converter runs on a Flux model.
Illustration 3.29 H-40 = [0] Speed open loop,
H-41 = [2] Flux sensorless
H-55 U/f Characteristic - U
Range:
Function:
0 V
*
[0 - 1000
V]
Enter the voltage at each frequency point to
manually form a U/f characteristic matching
the motor.
The frequency points are defined in
This parameter is an array parameter [0-5] and
is only accessible when
is set to
[0] U/f
.
H-56 U/f Characteristic - F
Range:
Function:
0 Hz
*
[0 - 1000.0
Hz]
Enter the frequency points to manually
form a U/f-characteristic matching the
motor.
The voltage at each point is defined in
H-56 U/f Characteristic - F
Range:
Function:
This parameter is an array parameter [0-5]
and is only accessible when
is set to
[0] U/f
.
Illustration 3.30 U/f Characteristic
H-58 Flystart Test Pulses Current
Range:
Function:
0 %
*
[0 -
0 %]
Sets the current level for the flystart test pulses
that are used to detect the motor direction. 100%
means I
m,n
. Adjust the value to be big enough to
avoid noise influence but low enough to avoid
affecting the accuracy (current must be able to
drop to zero before the next pulse). Reduce the
value to reduce the generated torque.
Default is 30% for asynchronous motors, but may
vary for PM motors. For PM motors adjusting the
value will tune for back EMF and d-axis inductance
of the motor.
This parameter is only available in Advanced Vector
Control.
H-59 Flystart Test Pulses Frequency
Range:
Function:
0 %
*
[0 - 0
%]
Sets the frequency of the flystart test pulses that
are used to detect the motor direction. 100%
means means 2 x fslip. Increase this value to
reduce the generated torque. For PM motors this
value is the percentage nm,n of the free running
PM motor. Above this value flystart is always
performed. Below this value, the start mode is
selected in
F-20 PM Start Mode
This parameter is only available in Advanced
Vector Control.
3.7.5 H-6# Load Depen. Settings
Parameters to configure the load-dependent motor
settings.
Parameter Descriptions
AF-650 GP Programming Guide
66
DET-618C
3
3
