Toshiba Tosvert VF-AS1 - Manual (Page 81)

E6581301
E-15
5
5.7 Manual torque boost–increasing torque boost at low speeds
XD : Manual torque boost 1
Ou
tpu
t v
o
ltage
Base frequency voltage 1 XNX
[V]/[%]
Output frequency [Hz]
XD
Base frequency XN
0
[Parameter setting]
Title Function Adjustment range Default setting
XD Manual torque boost 1 ~% According to model
+ This parameter is valid when RV= (Constant torque characteristics), (square reduction torque), (V/f 5-point
setting).
Note: The optimum value is programmed for each inverter capacity. Be careful not to increase the torque boost rate
too much because it could cause an overcurrent trip at startup. If you are going to change the set values, keep
them within ±2% of the standard default values.
5.8 Base frequency
XN : Base frequency 1
XNX : Base frequency voltage 1
Note: This is an important parameter that determines the constant torque control area.
O
u
tput
v
o
ltage
Base frequency voltage 1 XNX
[V] Output frequency [Hz]
0
Base frequency XN
[Parameter setting]
Title Function Adjustment range Default setting
XN
Base
frequency 1
~Hz
Inverter with a model number ending with -WN:
-WP:
XNX
Base
frequency
voltage 1
200V class: ~V
400V class: ~V
200V models:
400V models:
Inverter with a model number ending with -WN:
-WP:
• Function
If torque is inadequate at low speeds, increase torque by raising the torque boost rate with this parameter.
• Function
Sets the base frequency and the base frequency voltage in conformance with load specifications or the motor's
rated frequency.