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E6581381
E-19
5
Warning:
When setting the V/F control mode selection 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 load that requires 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 5.11.
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)