Hitachi WJ200-001L, Instruction Manual

Page: 442 / 680

Ver.2

13
•
When using this function, observe the following precautions:
①
In combination with the motor other than Hitachi standard motor, performance cannot be guaranteed to be
sufficient.
②
If you cannot obtain the desired characteristics from the motor driven under the sensorless vector control,
readjust the motor constants according to the symptom, as described in the table below
Operation
status
Symptom Adjustment method
Adjustme
nt item
Starting
Trouble is caused
when reverse run.
Enable to the initial magnet position estimation
function.
- The motor may rotate slightly, but this is not
abnormal behavior.
H123
Generate out-of-step.
Generate over current
trip.
Increase the starting current.
- Note the electronic thermal protection function.
H117
Increase the starting time. H118
Need for early
starting. Enable to the initial magnet position estimation
function, and reduce the starting time. H118,H12
3
Less than
H121 (PM
minimum
frequency)
setting
Motor runs unsteadily.
Increase the starting current
- Note the electronic thermal protection function.
H117
Motor generate
hunting.
Reduce the motor constant R step by step from the set
value down to 0.7 times as high as the set value. H106,H11
1
Increase the motor constant Ld step by step from the
set value up to 1.3 times as high as the set value.
Increase the motor constant Lq step by step from the
set value up to 1.3 times as high as the set value.
- Please adjust to Ld
≦
Lq.
H107,H11
2
H108,H11
3
Near H121
(PM
minimum
frequency)
setting
Motor generates an
impact.
Generate over current
trip.
Adjust the speed response. H116
Adjust the minimum frequency when a load changes. H121
More than
H121(PM
minimum
frequency)
setting
Motor generate
hunting.
Adjust the speed response. H116
Increase the no-load current. H122
Increase the carrier frequency current if low setting. b083