Setting The Electronic Thermal Protective Function - Toshiba TOSVERT VF-A7 Instruction Manual

5.12 Manual torque boost

Function
When the torque produced in low speed ranges is not large enough, it can be
boosted up by increasing the torque boost rate with this parameter.
Base-frequency voltage 
Output voltage [ ]
[Parameter]
Title
Manual boost

This parameter is valid when  = (V/f constant), (square reduction torque) or
(V/f 5-points setting).
Note 1) Torque boost rate has been set optimally according to the inverter capacity. Do not set the
torque boost rate too high, or the inverter may trip during start-up because of an over-current.
When needs to be changed, be careful not to increase more than +/-2% of the default value.

5.13 Setting the electronic thermal protective function





Function
These parameters are used to set the electronic thermal protective function according to
the rating and characteristic of the motor to be controlled.
Parameter setting
Title
Selection of electronic
thermal protection

characteristics
Motor overload protection

level #1
- Increasing the torque produced at low speeds
Manual torque boost

Function
  [%]
Selection of electronic thermal protection characteristics
Motor overload protection level #1
Overload reduction start-up frequency
Motor 150%-overload time limit
Function
Setting








  [%]
E-24
Base frequency 
Adjustment range
Adjustment range
Kind of Overload
motor protection
protect
protect
Standard
motor not protect
not protect
protect
VF motor
protect
(special
not protect
motor)
not protect
Output frequency [Hz]
Default setting
Model dependent
Default setting
Overload stall
not stall
stall
not stall

stall
not stall
stall
not stall
stall
