E6581158
F-50
6
6.17
Setting motor constants
H
: Auto-tuning
H
: Slip frequency gain
H
: Motor constant #1 (primary resistance)
H
: Motor rated current
H
: Motor no-load current
H
: Motor rated speed
H
: Speed control response coefficient
H
: Speed control stable coefficient
H
: Exciting strengthening coefficient
H
: Stall cooperation gain at field weakening zone 1
H
: Stall cooperation gain at field weakening zone 2
H
: Motor adjustment factor
To use vector control, automatic torque boost and automatic energy saving, motor constant setting (motor tuning)
is required. The following three methods are available to set motor constants (for automatic torque boosting,
however, two methods are available):
In case you use the Toshiba 4-terminal standard motor in the same capacity as the inverter, auto-tuning is not
necessary.
1)
Using the automatic torque boost (
CW
) for setting the V/F control mode selection (
RV
) and auto-tuning
(
H
) at the same time
2)
Setting V/F control mode selection (
RV
) and auto-tuning (
H
) independently
3)
Combining the V/F control mode selection (
RV
) and manual tuning
,
Check to be sure that the setting of the parameter
XN
and that of the parameter
XNX
agree with the base
frequency (rated rotational speed) and base frequency voltage (rated voltage) of the motor to be operated,
respectively. If not, set the parameters correctly.
,
When using the inverter to control the operation of a motor smaller in capacity by one grade or more, be
sure to set the motor rated current setting parameter (
H
) properly.
,
Vector control may not operate properly if the motor capacity differs from the applicable rated capacity of
the inverter by more than two grades.
If current waveforms oscillate during operation, increase the speed control stability factor (
H
). This is
effective in suppressing oscillation.
