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E6581381
F-45
6
6.15 Setting motor constants
6.15.1 Setting motor constants 1
H : Auto-tuning
H
: Slip frequency gain
H
: Autmatic torque boost value
H
: Motor rated current
H
: Motor no-load current
H
: Motor rated speed
H
: Speed control response coefficient
H
: Speed control stable coefficient
To use vector control, automatic torque boost and automatic energy saving, motor constant setting (motor tuning)
is required. The following two methods are available to set motor constants.
1) Setting V/F control mode selection (RV) and auto-tuning (H) independently
2) 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.