Toshiba TOSVERT VF-nC3E - Setting Procedure Adjust the Following Parameters; Adjustment Method for the Moment of Inertia of the Load

E6582233
F-44
6
Setting procedure Adjust the following parameters:
: Set the compensation gain for the slipping of the motor. A higher slip frequency reduces motor
slipping correspondingly. After setting , set  to adjust in detail. Be careful as
inputting a value larger than necessary causes hunting and other unstable operation.
: Adjust the primary resistive component of the motor. Decreases in torque due to a possible voltage
drop during low-speed operation can be suppressed by setting a large value in this parameter. Be
careful as setting a value larger than necessary may lead to an increased current causing a trip at
low speeds. (Perform adjustments according to the actual operation.)
: Set the motor's rated capacity according to the motor's name plate or test report.
: Set the rated current of the motor. For the rated current, see the motor's nameplate or test report.
: Set the ratio of the no-load current of the motor to the rated current. Enter the value in % that is
obtained by dividing the no-load current specified in the motor's test report by the rated current.
Increasing this value increases the excitation current.
: Set the rated rotational speed of the motor. For the rated current, see the motor's nameplate or test
report.
★ Adjustment method for the moment of inertia of the load
: Adjusts the excess response speed. A larger value gives a smaller overshoot at the
acceleration/deceleration completion point. In the default settings, the moment of inertia of the load
(including the motor shaft) value is optimally set considering a motor shaft of 1x. When the
moment of inertia of the load is not 1x, set a value that matches that actual moment of inertia of
the load.

: If the rated capacity of the motor is one size smaller than that of the inverter, lower the thermal
protective level according to the rated current of the motor.
* Sensorless vector control may not operate properly if the motor capacity differs from the
applicable rated capacity of the inverter by more than two grades.
Caution:
If a combination of the inverter rating and the motor capacity is different for more than 2 items, vector
control may not operate correctly.
Note 1: , , , , , , , , ,  and
 (Motor specific coefficient 1-9A) are parameters for manufacturer settings. Do not change
the parameters.