Omron VARISPEED G7 -, Instruction Manual, Page: 235 / 417

6
-40
Fig 6.32
•
With vector control, the carrier frequency is fixed to the Carrier Frequency Upper Limit in C6-03 if user-
set or by the carrier frequency set in C6-02.
•
To fix the carrier frequency, set C6-03 and C6-04 to the same value, or set C6-05 to 0.
•
If the settings are as shown below, OPE11 (Constant setting error) will occur.
If Carrier Frequency Proportional Gain (C6-05) > 6 and C6-03 < C6-04.
•
Depending on the carrier frequency setting, the Inverter’s overload level may be reduced. Even when the
overload current falls to below 150%, OL2 (Inverter overload) will be detected. The Inverter overload cur-
rent reduction level is shown below.
Fig 6.33 Overload Reduction Level for V/f Control, V/f Control with PG, Open-loop Vector Control 1,
and Flux Vector Control
Fig 6.34 Overload Reduction Level for Open-loop Vector Control 2
C6-03
C6-04
Output frequency
Output frequency
×
C6-05
×
K*
E1-04
Max. Output Frequency
Carrier Frequency
K is the coefficient determined by the set
value in C6-03.
C6-03
≥
10.0 kHz: K=3
10.0 kHz > C6-03
≥
5.0 kHz: K=2
5.0 kHz > C6-03: K=1
*
100%
15kHz 0
50%
80%
200V 級 22kW
10kHz
200 V, 22 kW
Carrier frequency
Overload reduction level
100%
8kHz 0
50%
4kHz
87%
200 V, 30 to 75 kW
Overload reduction level
Carrier frequency