6. Function Description
6-85
6.9.2 Magnetic flux building time
SLS_01(Flux BD Time)
Before the motor starts to run, DC voltage is applied to the stator winding in order that the stator winding carries current
at a certain level (exiting current).
6.9.3 Magnetic flux estimator gain control
SLS_02(FlxEst PGain) / SLS_03(FlxEst IGain)
The gain of the magnetic flux estimator used for sensorless control can be adjusted. The default value is applicable.
Increase both P Gain and I Gain up to 200, if load response or speed is unstable.
6.9.4 Speed controller
In the sensorless control mode, a speed controller gain, which is different from the Speed control mode, is applied. If the
speed response of the motor is slow or speed control error is large, observe the condition while increasing the SLS_04 up
to 50, at the step of 10.
6.9.5 Speed estimator gain
This gain relates to the motor speed estimation. In most cases, it is not necessary to change the value.
6.9.6 Current controller cut-off frequency
This is the cut-off frequency of the current controller exclusively for sensorless control.
6.9.7 Regeneration avoiding operation
Since the control of the regenerative operation (load opposite to the direction of rotation) near the zero speed is unstable,
this function increases speed command temporarily to get out of the regenerative operation range. When this function is
active, the motor speed may be different from the speed specified by the speed command, according to the magnitude of
the regenerative load.
6.9.8 Speed controller gain monitoring
In the sensorless mode, you can observe the calculated PI gain value of the speed controller in order to check and
compare the value with the value of the sensored mode.
6.9.9 Magnetic flux estimator monitoring
The command and the feed-back value of the magnetic flux estimator can be monitored.
6.9.10 Stator resistance scale
This parameter is used to solve the problems in starting-up large motors whose capacity is 37kW or above. For smaller
capacity motors, this parameter can be set up by 100%, or for larger capacity motors, increase the value to 120%, which
is the default setting.
Содержание LSLV-iV5 Series
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