Fine Tuning Sensorless Vector - Hitachi WJ200 Instruction Manual

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

Momentary speed variation is negative

Powering

Momentary speed variation is positive

Regeneration

Motor generates an impact at start

Starting

Decelerating

Low Frequency

Operation

Symptom

Torque is insufficient at

low speed (~ few Hz)

Motor runs backward for short

moment at start

Motor runs unsteadily

Motor rotation is unstable

Adjustment Method

Increase the motor constant R2 step by step

from the set value up to 1.2 times of the set

value

Decrease the motor constant R2 step by step

from the set value up to 0.8 times of the set

value

Increase the motor constant R1 step by step

from the set value up to 1.2 times of the set

value

Increase the motor constant Io step by step

from the set value up to 1.2 times of the set

value

Reduce the motor constant J from the set value

Decrease the speed response factor

Set 01 (enable) on reverse run protection

function (b046)

Decrease the speed response factor

Decrease the motor constant J from the set

value

Increase the motor constant J from the set

value

Increase the speed response factor

Adjustment

Parameter

H021

H021

H020

H023

H024

H005

b046

H005

H024

H024

H005

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