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.
Output voltage
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.
Output voltage(%)
Base frequency voltage
XNX
XD
Base frequency XN
0
Output frequency (Hz)
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