GE AF-650 GP Programming Manual page 73

Parameter Descriptions
H-53 Model Shift Frequency
Range:
3 3
72
Function:
Flux model 1 and Flux model 2; or shift between
Variable Current mode and Flux model 2.
This parameter cannot be adjusted while the
motor is running.
Flux Model 1 – Flux model 2
This model is used when parameter H-40 Configu-
ration Mode is set to [1] Speed closed loop or [2]
Torque and parameter H-41 Motor Control Principle
is set to [3] Flux w/motor feedback. With this
parameter it is possible to make an adjustment of
the shifting point where AF-650 GP changes
between Flux model 1 and Flux model 2, which is
useful in some sensitive speed and torque control
applications.
Illustration 3.29 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 x 0.1, the drive runs on a Variable
norm
Current model. Above f x 0.125 the frequency
norm
converter runs on a Flux model.
Illustration 3.30 H-40 = [0] Speed open loop,
H-41 = [2] Flux sensorless
H-54 Voltage reduction in fieldweakening
Range:
0 V [0 - 100
*
V]
H-55 U/f Characteristic - U
Array [6]
Range:
0 V [0 -
*
1000 V]
H-56 U/f Characteristic - F
Array [6]
Range:
0 Hz [0 -
*
1000.0 Hz]
Illustration 3.31 U/f Characteristic
02/2016 All rights reserved.
Function:
The value of this parameter reduces the
maximal voltage available for the flux of the
motor in field weakening, giving more voltage
available for torque. An excessive value may
cause stall problems at high speed.
Function:
Enter the voltage at each frequency point to
manually form a U/f characteristic matching the
motor.
The frequency points are defined in
parameter H-56 U/f Characteristic - F.
This parameter is an array parameter [0-5] and
is only accessible when parameter H-41 Motor
Control Principle is set to [0] U/f.
Function:
Enter the frequency points to manually form
a U/f characteristic matching the motor.
The voltage at each point is defined in
parameter H-55 U/f Characteristic - U.
This parameter is an array parameter [0–5]
and is only accessible when
parameter H-41 Motor Control Principle is set
to [0] U/f.
DET-618D