E6581531
E-11
5
5.6
Selecting control mode
RV
: V/f control mode selection
[Parameter setting]
Title
Function
Adjustment range
Default setting
RV
V/f control mode selection
: Constant torque characteristics
: Voltage decrease curve
: Automatic torque boost
: Sensorless vector control 1
: - (No operation)
: V/f 5-point setting
:
PM control
( Unsupported )
: PG feedback control
: - (No operation)
: Energy-saving
: Advanced energy-saving
Caution
Mandatory
• When operating the inverter with
RV
set to
,
,
,
or
be sure to set the motor
constant parameter correctly. Failure to do this may cause the inverter not to control the motor
properly, and thus cause the motor not to deliver the desired performance. For more information,
see the explanation of each
RV
setting in the following sections.
1) Constant torque characteristics (Normal way of use)
Setting of V/f control mode selection
RV
=
(Constant torque characteristics)
This is applied to loads with equipment like conveyors and cranes that require the same torque at low speeds as at
rated speeds.
Base frequency voltage 1
XNX
Output frequency [Hz]
XD
Base frequency
XN
0
O
u
tput
v
olt
ag
e
[V]/[%]
* To increase the torque further, increase the setting value of the manual torque boost parameter
XD
.
⇒
For more details, refer to Section 5.7.
• Function
With “VF-PS1,” the V/f controls shown below can be selected.
0: Constant torque characteristics
1: Voltage decrease curve
2: Automatic torque boost (*1)
3: Sensorless vector control ( *1)
5: V/f 5-point setting
6: PM control ( *2)
7: PG feedback control ( *3)
9: Energy-saving
10: Advanced energy-saving
(*1) “Automatic control” parameter automatically sets this parameter and auto-tuning 1 at a time.
(
*
2) Unsupported.
(
*
3) A PG feedback device (optional) is needed for this control.
