GE AF-650 GP Programming Manual page 94

H-51 Min Speed Normal Magnetising [RPM]
Range:
15. RPM* [10 - 300 RPM]
H-52 Min Speed Normal Magnetising [Hz]
Range:
12.5 Hz* [0 - 250.0 Hz]
H-53 Model Shift Frequency
Range:
0 Hz* [4.0 - 0 Hz]
Function:
Set the required speed for normal magnetising current. If the speed is set lower than the motor slip speed,
par. H-50 Motor Magnetisation at Zero Speed and par. H-51 Min Speed Normal Magnetising [RPM] are of
no significance.
Use this par. along with par. H-50 Motor Magnetisation at Zero Speed. See drawing for par. H-50 Motor
Magnetisation at Zero Speed.
Function:
Set the required frequency for normal magnetising current. If the frequency is set lower than the motor
slip frequency, par. H-50 Motor Magnetisation at Zero Speed is inactive.
Use this parameter along with par. H-50 Motor Magnetisation at Zero Speed. See drawing for par.
H-50 Motor Magnetisation at Zero Speed.
Function:
Flux Model shift
Enter the frequency value for shift between two models for determining motor speed. Choose the value
based on settings in par. H-40 Configuration Mode and par. H-41 Motor Control Principle. There are two
options: shift between 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 par. H-40 Configuration Mode is set to Speed closed loop [1] or Torque [2] and
par. H-41 Motor Control Principle is set to Flux w/motor feedback [3]. 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 3.3: 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 Speed open loop [0] and H-41 is set to Flux sensorless [2].
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 Current model. Above f
norm
runs on a Flux model.
AF-650 GP Programming Guide
x 0.125 the frequency converter
norm
3
93