Toshiba Tosvert VF-S15 Instruction Manual page 130

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.
Base frequency voltage


* To increase the torque further, increase the setting value of the manual torque boost value 1 ().
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 is
proportional to the square of load rotation speed.
Base frequency voltage


0
Base frequency 
0
Base frequency 
F-19
E6581926
Output frequency (Hz)
 Refer to section 6.4 for details.
Output frequency (Hz)
6