Toshiba TOSVERT VF-nC3E

E6582233
E-19
5
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)
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.
:Automatically
adjusts the
amountof torque
boost.
Output voltage(%)
Base frequency voltage

Output frequency (Hz
)
Base frequency

0
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 .