C
Co
on
ns
stta
an
ntt C
Ca
arrrriie
err F
Frre
eq
qu
ue
en
nc
cy
y
Range: 1 - 6 (x 2.5 kHz)
n
n 3
3 7
7
Factory Setting: 4
The user can select a lower carrier frequency, depending on allowable operating noise
levels for the application. Adjusts in increments of 2.5 kHz (set value x 2.5 kHz =
carrier frequency).
Setting
Carrier Frequency (kHz):
1
2.5
2
5.0
3
7.5
4
10.0
5
12.5
6
15.0
C
Co
on
ns
stta
an
ntt A
Au
utto
om
ma
attiic
c T
To
orrq
qu
ue
e B
Bo
oo
os
stt
Range: 0.0 - 3.0
n
n 3
3 8
8
G
Ga
aiin
n
Factory Setting: 1.70
Sets the torque compensation, in
increments of 0.1. When the motor has
the same capacity as that of the GPD
205, the gain is 1.0. When a smaller
motor is used, the gain should be set to
1.5 (typical).
When the wiring
distance between the drive and the
motor is long, or when the motor
generates vibration, change the
automatic torque boost gain, and set the V/f pattern (n
n 2
2 4
4 to n
n 3
3 0
0 ). Except for the
most demanding of high torque applications, the factory setting of this constant will
be adequate. The factory setting in programmed to match the performance
characteristics of typical AC motors,
Motor torque can be adjusted either by changing the V/f pattern or by using full-
range automatic torque boost. For details on setting the V/f pattern, see pages 37-
39. Full-range automatic torque boost adjusts the voltage of the V/f pattern
according to the required torque, which changes with load conditions. The GPD 205
automatically adjusts the voltage during constant-speed operation as well as during
acceleration.
The required torque is calculated by the drive.
Output voltage
∝
Automatic torque boost gain x Required torque
44
V
(VOLTAGE)
f
(FREQUENCY)
Required torque
Increased voltage
for more: efesotomasyon - Yaskawa drive
