GE AF-650 GP Programming Manual page 41

Parameter Descriptions
F-26 Motor Noise (Carrier Freq)
Select the carrier frequency. Changing the switching frequency
reduces acoustic noise from the motor. Default values depend on
power size.
Option:
3 3
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0kHz
[13] 14.0 kHz
[14] 16.0kHz
F-27 Motor Tone Random
Option: Function:
[0] Off No change of the acoustic motor switching noise.
*
[1] On Select to reduce the acoustic noise from the motor.
F-28 Dead Time Compensation
Option:
[0] Off
[1] On
*
F-29 Start Current
Range:
0 [0 -
A par.
*
P-03 A]
3.3.5 F-3# Fundamental 3
Parameters to configure drive Advanced Switching Pattern
and Overmodulation.
F-33 Source for User-defined Readout
Option:
[105] Torq relate to rated
[143] PID Clamped Output 4-20mA
[240] Default Source
*
F-37 Adv. Switching Pattern
Option:
[0] 60 AVM
[1] SFAVM
*
40
Function:
Function:
No compensation.
Activates dead-time compensation.
Function:
Some motors, for example cone rotor motors,
need extra current/starting speed to disengage the
rotor. To obtain this boost, set the required current
in parameter F-29 Start Current. Set
parameter F-22 Start Speed [RPM]. Set
parameter F-25 Start Function to [3] Start speed cw
or [4] Horizontal operation, and set a start delay
time in parameter F-24 Holding Time.
This parameter can be used for hoist applications
(cone rotor).
Function:
Select the switching pattern: 60° AVM or SFAVM.
F-38 Overmodulation
Option: Function:
[0] Off Select [0] Off for no overmodulation of the output
voltage to avoid torque ripple on the motor shaft. This
feature may be useful for applications such as grinding
machines.
[1] On Select [1] On to enable the overmodulation function
*
for the output voltage. This is the right option when it
is required that the output voltage is higher than 95%
of the input voltage (typically when running over-
synchronously). The output voltage is increased
according to the degree of overmodulation.
NOTICE
Overmodulation leads to increased torque
ripple as harmonics increase.
Control in flux control principle provides an output
current of up to 98% of the input current, regardless
of parameter F-38 Overmodulation.
3.3.6 F-4# Fundamental 4
Parameters to configure drive torque and current limits.
F-40 Torque Limiter (Driving)
Range:
160.0 %
*
Application
dependent
*
NOTICE
Changing parameter F-40 Torque Limiter (Driving) when
parameter H-40 Configuration Mode is set to [0] Speed
open loop, parameter H-66 Min. Current at Low Speed is
automatically readjusted.
NOTICE
The torque limit reacts on the actual, non-filtered torque,
including torque spikes. This is not the torque that is
seen from the keypad or the fieldbus as that torque is
filtered.
Function:
F-41 Torque Limiter (Braking)
Range:
100 % [0 - 1000.0 %] This function limits the torque on the
*
02/2016 All rights reserved.
Function:
[0 - 1000.0 %] This function limits the
[Application torque on the shaft to
dependent] protect the mechanical
installation.
Function:
shaft to protect the mechanical instal-
lation.
DET-618D