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E6581381
E-21
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 H
to H properly.
Be sure to set H (rated current of motor) and H (rated speed of motor) correctly, as specified on
the motor’s nameplate. For the setting of H (no-load current of motor), refer to the motor test report.
There are two procedures for setting the other motor constants.
1) The motor constant can be automatically set (auto-tuning).
Set the extended parameter H to .
⇒ For details, see selection 1 in 6.15.1.
2) Each motor constant can be set individually.
⇒ For details, see selection 2 in 6.15.1.
5) Energy-saving
Setting of V/F control mode selection RV to (Energy-saving)
Energy can be saved in all speed areas by detecting load current and flowing the optimum current that fits
the load.
+ 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 no need to set the motor constant. In any other case, be sure to set the parameters H to
H properly.
Be sure to set H (rated current of motor) and H (rated speed of motor) correctly, as specified on
the motor’s nameplate. For the setting of H (no-load current of motor), refer to the motor test report.
There are two procedures for setting the other motor constants.
1) The motor constant can be automatically set (auto-tuning). Set the extended parameter H to .
⇒ For details, see selection 1 in 6.15.1.
2) Each motor constant can be set individually.
⇒ For details, see selection 2 in 6.15.1.
6) Operating a permanent magnet motor
Setting of V/F control mode selection RV to (PM motor control)
Permanent magnet motors (PM motors) that are light, small in size and highly efficient, as compared to
induction motors, can be operated in sensor-less operation mode.
Note that this feature can be used only for specific motors. For more information, contact your Toshiba dealer.
7) Precautions on vector control
1) When exercising vector control, be sure to set the extended parameters H to H properly. Be
sure to set H (rated current of motor) and H (rated speed of motor) correctly, as specified on
the motor’s nameplate. For the setting of H (no-load current of motor), refer to the motor test report.
2) The sensorless vector control exerts its characteristics effectively in frequency areas below the base
frequency (XN). The same characteristics will not be obtained in areas above the base frequency.
3) Set the base frequency to anywhere from 40 to 120Hz during vector control (RV=).
4) Use a general purpose squirrel-cage motor with a capacity that is the same as the inverter's rated capacity or
one rank below.
The minimum applicable motor capacity is 0.1kW.