Toshiba TOSVERT VF-MB1, Instruction Manual

Page: 116 / 350

E6581697
E-22
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 no need to set the motor constant.
In any other case, set the following parameters according to the
motor’s name plate.

(Base frequency 1),

(Base frequency voltage 1),

(Motor rated capacity),

(Motor
rated current),

(Motor rated speed)

There are three procedures for setting the other motor constants.
1) Automatic energy-saving operation and a motor constant can be set at once.
Set the basic parameter

to

.
⇒
Refer to section 5.5 for details.
2) The motor constant can be automatically set (auto-tuning).
Set the extended parameter  to  . ⇒ Refer to section 6.21 selection 2 for details.
3) Each motor constant can be set individually. ⇒ Refer to section 6.21 selection 4 for details.
6) Achieving further energy savings
Setting of V/F control mode selection  to  (Dynamic energy-saving)
More substantial energy savings than those provided by setting

to

can be achieved in any speed
range by keeping track of the load current and passing a current appropriate to the load. The inverter cannot
respond to rapid load fluctuations, so that this feature should be used only for loads, such as fans and pumps,
that are free of violent load fluctuations.
+
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, set the following parameters according to the
motor’s name plate.

(Base frequency 1),

(Base frequency voltage 1),

(Motor rated capacity),

(Motor
rated current),

(Motor rated speed)

There are two procedures for setting the other motor constants.
1) The motor constant can be automatically set (auto-tuning).
Set the extended parameter  to  . ⇒ Refer to section 6.21 selection 2 for details.
2) Each motor constant can be set individually. ⇒ Refer to section 6.21 selection 4 for details.
7) Operating a permanent magnet motor
Setting of V/F control mode selection

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.