Hitachi J300U Series - Manual (Page 119)

A-7
[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 Symptom Adjustment Adjusting Item
Status (DOP/DRW Function No.)
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.
Power running
(status with an
accelerating
torque)
Regeneration
(status with a
decelerating
torque)
When low frequency
(a few Hz) torque is
insufficient
When the speed
fluctuation coeffi-
cient becomes
minus
When the speed
fluctuation coeffi-
cient becomes plus
When low frequency
(a few Hz) torque is
insufficient
[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