Setting For Fans And Pumps - Toshiba TOSVERT VF-nC3E Instruction Manual

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.
Base frequency voltage


3) Increasing starting torque
Setting of V/F control mode selection  to  (automatic torque boost control)
Detects load current in all speed ranges and automatically adjusts voltage output (torque boost) from inverter.
This gives steady torque for stable runs.
Base frequency voltage
:Automatically
adjusts the
amountof torque
boost.
Note: This control system can oscillate and destabilize runs depending on the load. In this case, set
V/F mode selection = (V/F constant) and increase manual torque boost .
0
Base frequency 

0
Base frequency 
E-19
E6582233
Output frequency (Hz)
Output frequency (Hz)
5