Hitachi J300U Series Instruction Manual page 119

[NOTES]
*1: If the desired characteristic cannot be obtained in a sensorless vector control operation with auto
tuning measured data, adjust the motor constant according to the detected symptom shown
below.
(DOP, DRW, HOP, and HRW functions of the remote operator are needed for this adjustment.)
Operation
Status
Power running
When low frequency
(status with an
(a few Hz) torque is
accelerating
insufficient
torque)
When the speed
fluctuation coeffi-
cient becomes
minus
When the speed
fluctuation coeffi-
cient becomes plus
Regeneration
When low frequency
(status with a
(a few Hz) torque is
decelerating
insufficient
torque)
Symptom
Increase the motor constant R1 in relation to
auto tuning data step by step within 1.2 times.
Increase the motor constant R2 in relation to
auto tuning data step by step within 1.2 times.
Decrease the motor constant R2 in relation to
auto tuning data step by step within 0.8 times.
1) Increase the motor constant R1 in relation
to auto tuning data step by step within 1.2
times.
2) Decrease the motor constant M in relation
to auto tuning data step by step within 0.8
times.
3) Decrease the carrier frequency set value.
Combine the methods 1) to 3) above to adjust
the motor constant.
Adjustment
A-7
Adjusting Item
(DOP/DRW Function No.)
[F-05 AUX R1]
[F-05 AUX R2]
[F-05 AUX R2]
[F-05 AUX R1]
[F-05 AUX M]
[F-36 CARRIER]
( A 10 for digital
operator