Toshiba TOSVERT VF-AS1 User Manual

E6581528
E-16
5
5.7 Manual torque boost–increasing torque boost at low speeds
 : Manual torque boost 1
Output voltage
Base frequency voltage 1

[V]/[%]
Output frequency [Hz]

Base frequency

0
[Parameter setting]
Title Function Adjustment range Default setting
 Manual torque boost 1 ~ % According to model ⇒ Refer to page K-46.
 This parameter is valid when  =  (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
 : Base frequency 1
 : Base frequency voltage 1
Note: This is an important parameter that determines the constant torque control area.
Output voltage
Base frequency voltage 1 
[V]
Output frequency [Hz]
0
Base frequency

[Parameter setting]
Title Function Adjustment range Default setting
 Base frequency 1 ~ Hz ⇒ Refer to page K-2.

Base frequency
voltage 1
~ V ⇒ Refer to page K-2.
Note: The output frequency is limited to a frequency 10.5 times as high as the base frequency (). Even if the
maximum frequency () or the upper limit frequency () is set above this frequency, this limitation is
imposed on the output frequency.
• 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.

Toshiba TOSVERT VF-AS1 Specifications

General

Brand	Toshiba
Model	TOSVERT VF-AS1
Category	Inverter
Language	English