range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
C6-01 Carrier Freq Max 0.4 to
15.0
(See
note.)
kHz (See
note.)
Basic or Advanced
C6-02 Carrier Freq Min 0.4 to
15.0
(See
note.)
kHz (See
note.)
Advanced ---
C6-03 Carrier Freq Gain 0 to 99 Multi-
ple
0 Advanced ---
These parameters cannot be changed during operation.
Note The
setting range and the factory default setting vary according to the Inverter
capacity
. The table
shows a value of 200-V class, 0.4 kW.
In the vector control modes, the carrier frequency is determined by the carrier frequency upper limit
(parameter C6-01).
In
the V/f control modes (both with and without PG), the carrier
frequency can be changed in response to
the
output frequency by setting the carrier
frequency lower limit (parameter C6-02) and the carrier fre
-
quency proportional gain (parameter C6-03).
The coefficient “K” varies depending on the carrier
frequency upper limit, as described below:
Carrier frequency
Output frequency
x (C6-03) x K
Output frequency
(Maximum output frequency)
E1-04
C6-01
C6-02
T
o make the carrier frequency constant, either set the same value for parameters C6-01 and C6-02 or
set the carrier frequency proportional gain (parameter C6-03) to “0” (i.e., fix at upper limit value).
The following settings will generate a parameter setting fault (OPE11):
Carrier
frequency upper limit (C6-01) > 5.0 kHz and carrier frequency lower limit (c6-02)
x
5.0 kHz
Carrier frequency proportional gain (C6-03) > 6 and (C6-01) < C6-02)
If
the lower limit is set higher than the upper limit, the lower limit
will be ignored and carrier frequency will
be fixed at the upper limit.
Note For
a 400-V Inverter
, if the carrier frequency
is set to a value higher than the default setting, the
Inverter’s
rated output current will decrease.
If the Inverter
’
s overload is detected earlier than the
motor overload fault (OL2), set the carrier frequency to a lower value.
Advanced Operation Chapter
6
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