Hitachi SJ Series User Manual page 243

Chapter 12 Chapter 12 Chapter 12
Not successful Not successful
Phenomenon Phenomenon
Over current occurs at Over current occurs at Over current occurs at
the start the start
At the start, the motor At the st art, the motor
loses synchronization loses synchronization loses synchronization
and no acceleration is and no acceleration is and no acceleration is
observed. observed.
Loss of
synchronization, synchronization,
hunting, and/or over hunting, and/or over
current occur at low current occur at low
speeds (at the lowest speeds (at the lowest
frequency(switch) or frequency(switch) or
even lower). even lower).
Loss of
synchronization, synchronization,
hunting, and/or over hunting, and/or over
current occur at low current occur at low
speeds (at the lowest speeds (at the lowest
frequency(switch) or frequency(switch) or
even lower) and with a even lower) and with a
heavy load.
The drive becomes The drive becomes
unstable at low speeds unstable at low speeds
(at the lowest (at the lowest
frequency(switch) or frequency(switch) or
even lower) even lower)
！
• When the above • n the above-described procedures fail to allow described procedures fail to allow described procedures fail to allow described procedures fail to allow
successful adjustment, special adjustment may be successful adjustment, special adjustment may be successful adjustment, special adjustment may be successful adjustment, special adjustment may be successful adjustment, special adjustment may be
necessary. Please contact the sales officer of our necessary. Please contact the sales officer of our necessary. Please contact the sales officer of our necessary. Please contact the sales officer of our necessary. Please contact the sales officer of our
company.
Estimated cause(s)► Estimated cause(s) ►
• Insufficient starting Insufficient starting
torque
► Misalignment of the Misalignment of the Misalignment of the
output phases and output phases and
the motor's the motor's
magnetic-pole magnetic
positions positions
• Insufficient torque Insufficient torque
• Misalignment of the Misalignment of the Misalignment of the
output phases and output phases and
the motor's the motor's
magnetic-pole magnetic
positions positions
• Misalignment of the Misalignment of the Misalignment of the
output phases and output phases and output phases and
the motor's the motor's
magnetic-pole magnetic
positions positions
12-9-26
Exemplar measures to be taken Exemplar measures to be taken Exemplar measures to be taken Exemplar measures to be taken
•
Enable the selection of open Enabl e the selection of open-phase switch threshold
correction [Hd correction [Hd-44].
• Adjust each of the speed control P gain [Hd Adjust each of the speed control P gain [Hd Adjust each of the speed control P gain [Hd-45] and the Adjust each of the speed control P gain [Hd
speed control I gain [Hd-46] by 10 each time. speed control I gain [Hd speed control I gain [Hd
The adjustment should be conducted so that [Hd The adjustment should be conducted so that [Hd The adjustment should be conducted so that [Hd The adjustment should be conducted so that [Hd-45] ≤ The adjustment should be conducted so that [Hd
[Hd-46]. 46].
Some motor characteristics require an adjustment by Some motor characteris Some motor characteris tics require an adjustment by tics require an adjustment by
raising and lowering the settings. raising and lowering the settings. raising and lowering the settings. raising and lowering the settings.
• Adjust the waiting time for open Adjust the waiting time for open-phase switching [Hd Adjust the waiting time for open
incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics
require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings.
• Enable the selection of open Enable the selection of open Enable the selection of open-phase switch threshold
correction [Hd-44]. correction [Hd
• Adjust each of the speed control P gain [Hd Adjust each of the speed control P gain [Hd Adjust each of the speed control P gain [Hd Adjust each of the speed control P gain [Hd-45] and the
speed control I gain [Hd-46] by 10 each time. speed control I gain [Hd speed control I gain [Hd
The adjustment should be conducted so t The adjustment should be conducted so t The adjustment should be conducted so that [Hd The adjustment should be conducted so t
[Hd-46]. 46].
Some motor characteristics require an adjustment by Some motor characteristics require an adjustment by Some motor characteristics require an adjustment by Some motor characteristics require an adjustment by Some motor characteristics require an adjustment by
raising and lowering the settings. raising and lowering the settings. raising and lowering the settings. raising and lowering the settings.
• Adjust the waiting time for open Adjust the waiting time for open Adjust the waiting time for open-phase switching [Hd
incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics
require an adjustment by raising and lowering the settings. require an adjustment by require an adjustment by
• Adjust by decrementing the current limit of IVMS threshold Adjust by decrementing the current limit of IVMS threshold Adjust by decrementing the current limit of IVMS threshold Adjust by decrementing the current limit of IVMS threshold Adjust by decrementing the current limit of IVMS threshold
[Hd-51] by 5 51] by 5 each time. Some motor characteristics may each time. Some motor characteristics may each time. Some motor characteristics may each time. Some motor characteristics may
provide instability with excessively small settings. provide instability with excessively small settings. provide instability with excessively small settings. provide instability with excessively small settings. provide instability with excessively small settings.
• Adjust by decrementing the IVMS threshold gain [Hd Adjust by decrementing the IVMS threshold gain [Hd Adjust by decrementing the IVMS threshold gain [Hd-52] by Adjust by decrementing the IVMS threshold gain [Hd Adjust by decrementing the IVMS threshold gain [Hd
5 each time. Some motor characteristics require an 5 each time. Some motor characteristics require an 5 each time. Some motor characteristics require an 5 each time. Some motor characteristics require an 5 each time. Some motor characteristics require an
adjustment by raising and lowering the settings. adjustment by raising and lowering the settings. adjustment by raising and lowering the settings. adjustment by raising and lowering the settings. adjustment by raising and lowering the settings.
• Adjust by decrementing the IVMS detection current filter Adjust by decrementing the IVMS detection current filter Adjust by decrementing the IVMS detection current filter Adjust by decrementing the IVMS detection current filter Adjust by decrementing the IVMS detection current filter
gain [Hd-42] by 5 each time. gain [Hd 42] by 5 each time. Some motor characteristics
require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering the settings.
• Adjust the waiting time for open Adjust the waiting time for open-phase switching [Hd Adjust the waiting time for open
incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics incrementing it by 5 each time. Some motor characteristics
require an adjustment by raising and lowering th require an adjustment by raising and lowering the settings. require an adjustment by raising and lowering th require an adjustment by raising and lowering th require an adjustment by raising and lowering th
26
Inverter Function Inverter Function Inverter Function
phase switch threshold phase switch threshold
45] and the
46] by 10 each time. 46] by 10 each time.
phase switching [Hd-47] by phase switching [Hd
phase switch threshold phase switch threshold
45] and the
46] by 10 each time. 46] by 10 each time.
hat [Hd-45] ≤
phase switching [Hd-47] by phase switching [Hd
raising and lowering the settings. raising and lowering the settings.
Some motor characteristics Some motor characteristics
-phase switching [Hd phase switching [Hd-47] by
52] by
47] by