Toshiba TOSVERT VF-FS1 Instruction Manual page 86

3) Increasing starting torque
Detects load current in all speed ranges and automatically adjusts voltage output (torque boost) from inverter.
This gives steady torque for stable runs.
5
Motor constant must be set
If the motor you are using is a 4P Toshiba standard motor and if it has the same capacity as the inverter,
there is basically no need to set the motor constant. In any other case, be sure to set the parameters
to
Be sure to set
the motor's nameplate. For the setting of
There are two procedures for setting the other motor constants.
1) The motor constant can be automatically set (auto-tuning). Set the extended parameter
2) Each motor constant can be set individually.
4) Vector control - increasing starting torque and achieving high-precision operation.
Using sensor-less vector control with a Toshiba standard motor will provide the highest torque at the low
speed ranges.
(1) Provides large starting torque.
(2) Effective when stable operation is required to move smoothly up from the low speeds.
(3) Effective in elimination of load fluctuations caused by motor slippage.
Setting of V/F control mode selection
Base frequency voltage
:Automatically
adjusts the
amountof torque
boost.
Note: This control system can oscillate and destabilize runs depending on the load. If that should
happen, set V/F control mode selection
properly.
(rated current of motor) and
Setting of V/F control mode selection
to (automatic torque boost control)
0
Base frequency
to (V/F constant) and increase torque manually.
(rated speed of motor) correctly, as specified on
(no-load current of motor), refer to the motor test report.
⇒ For details, see selection 1 in 6.15.1.
⇒ For details, see selection 2 in 6.15.1.
to (Vector control)
E-20
E6581381
Output frequency (Hz)
to .