Manual Torque Boost-Increasing Torque Boost At Low Speeds; Base Frequency - Toshiba VF-PS1 Instruction Manual

5.7 Manual torque boost–increasing torque boost at low speeds

• Function
If torque is inadequate at low speeds, increase torque by raising the torque boost rate with this parameter.
Base frequency voltage 1
[Parameter setting]
Title

5 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



• Function
Sets the base frequency and the base frequency voltage in conformance with load specifications or the motor's
rated frequency.
Note: This is an important parameter that determines the constant torque control area.
Base frequency voltage 1
[Parameter setting]
Title
Base

frequency 1
Base
frequency

voltage 1
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.
: Manual torque boost 1


[V]/[%]
Function
Manual torque boost 1
: Base frequency 1
: Base frequency voltage 1

[V]
Function Adjustment range
~ Hz
200V class: ~ V
400V class: ~ V
0
Base frequency
Adjustment range
According to model ⇒ Refer to page K-41.
~ %
0
Base frequency
Inverter with a model number ending with -WN: 
200V models: 
400V models:
Inverter with a model number ending with -WN: 
E-16
Output frequency [Hz]

Default setting
Output frequency [Hz]

Default setting
-WP: 
-WP: 
E6581386