E6581158
E-18
5
Warning:
When setting the V/F control mode selection 1 parameter (
RV
) to any number between
and
, be sure
to set at least the following parameters.
H
(Motor rated current): See the motor's nameplate.
H
(No-load current of motor): Refer to the motor test report.
H
(Rated rotational speed of motor): See the motor's nameplate.
Set also other torque boost parameters (
H
to
H
), as required.
1) Constant torque characteristics
Setting of V/F control mode selection
RV
to
(V/F constant)
This is applied to loads with equipment like conveyors and cranes that require the same torque at low
speeds as at rated speeds.
O
u
tput
v
o
lt
age
Base frequency voltage
XNX
Output frequency (Hz)
XD
Base frequency
XN
0
* To increase the torque further, increase the setting value of the manual torque boost
XD
.
⇒
For more details, see 5.12.
2) Setting for fans and pumps
Setting of V/F control mode selection
RV
to
(variable torque)
This is appropriate for load characteristics of such things as fans, pumps and blowers in which the torque in
relation to load rotation speed is proportional to its square.
O
u
tput
v
o
lt
age
(%
)
Base frequency voltage
XNX
XD
Base frequency
XN
0
Output frequency (Hz)
