Hitachi WJ200 - FINE TUNING SENSORLESS VECTOR

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FINE TUNING SENSORLESS VECTOR
In most cases fine tuning is not required with the standard motor constants that are supplied when selecting the correct
motor constant profile in parameter H003. Before making adjustments, try selecting a motor constant profile (1) smaller
or larger than the combined connected motors in kW’s in parameter H003.
Status Symptom Adjustment Method
Adjustment
Parameter
Powering
Momentary speed variation is negative
Increase the motor constant R2 step by step
from the set value up to 1.2 times of the set
value
H021
Momentary speed variation is positive
Decrease the motor constant R2 step by step
from the set value up to 0.8 times of the set
value
H021
Regeneration
Torque is insufficient at
low speed (~ few Hz)
Increase the motor constant R1 step by step
from the set value up to 1.2 times of the set
value
H020
Increase the motor constant Io step by step
from the set value up to 1.2 times of the set
value
H023
Starting
Motor generates an impact at start
Reduce the motor constant J from the set value H024
Decrease the speed response factor H005
Motor runs backward for short
moment at start
Set 01 (enable) on reverse run protection
function (b046)
b046
Decelerating Motor runs unsteadily
Decrease the speed response factor H005
Decrease the motor constant J from the set
value
H024
Low Frequency
Operation
Motor rotation is unstable
Increase the motor constant J from the set
value
H024
Increase the speed response factor H005