Sumitomo HF-320a Series - Page 90

E-18
5
Warning:
When setting the V/F control mode selection 1 parameter () to any number between  and , be sure
to set at least the following parameters.
 (Motor rated current): See the motor's nameplate.
 (No-load current of motor): Refer to the motor test report.
 (Rated rotational speed of motor): See the motor's nameplate.
Set also other torque boost parameters ( to ), as required.
1) Constant torque characteristics
Setting of V/F control mode selection  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

Output frequency (Hz)

Base frequency 
0
* To increase the torque further, increase the setting value of the manual torque boost .
⇒ For more details, see 5.12.
2) Setting for fans and pumps
Setting of V/F control mode selection  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


Base frequency 
0
Output frequency (Hz)