Hitachi SJ Series, User Manual

Page: 234 / 786

Chapter 12
•
•
Socks occur during the revolutions at
the start.
The motor is hunting.
Unsteady revolutions at low speeds,
resulting in fluctuating revolutions.
Chapter 12
• Set the carri
kHz or higher. A set frequency of 1.9 kHz or lower
may cause an incorrect operation.
• When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the
no such adjustment as ones mentioned above
improves the state, checking the portion around the
motor may sometimes improves it.
！
Phenomenon
Socks occur during the revolutions at
the start.
The motor is hunting.
Unsteady revolutions at low speeds,
resulting in fluctuating revolutions.
Normal acceleration is impossible
and the protection against the over
load works.
The performance is not sufficient for
what the motor control characteristics
predict.
Chapter 12
Set the carrier frequency [bb101] at a value of 2.0
kHz or higher. A set frequency of 1.9 kHz or lower
may cause an incorrect operation.
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the
no such adjustment as ones mentioned above
improves the state, checking the portion around the
motor may sometimes improves it.
Phenomenon
▶
Socks occur during the revolutions at
The motor is hunting.
Unsteady revolutions at low speeds,
resulting in fluctuating revolutions.
Normal acceleration is impossible
and the protection against the over
The performance is not sufficient for
what the motor control characteristics
er frequency [bb101] at a value of 2.0
kHz or higher. A set frequency of 1.9 kHz or lower
may cause an incorrect operation.
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the
no such adjustment as ones mentioned above
improves the state, checking the portion around the
motor may sometimes improves it.
Estimated cause(s)
Socks occur during the revolutions at
• The control system has a
frequency response that is too
high.
• The control system has a frequency
response that is too low.
• An improper motor
being used.
• An improper phase sequence is
being used.
what the motor control characteristics
• An improper motor constant is
being used.
er frequency [bb101] at a value of 2.0
kHz or higher. A set frequency of 1.9 kHz or lower
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the like. When
no such adjustment as ones mentioned above
improves the state, checking the portion around the
Estimated cause(s)
The control system has a
frequency response that is too
The control system has a frequency
response that is too low.
An improper motor constant is
An improper phase sequence is
An improper motor constant is
12-9-17
er frequency [bb101] at a value of 2.0
kHz or higher. A set frequency of 1.9 kHz or lower
When the revolution of the motor is hindered by
like. When
improves the state, checking the portion around the
• If an application of load results in a great amount of
change in the inverter'
[dA
change the frequencies for the overload limiting
function, the momentary
the over voltage suppression function may work
depending upon the settings of the funct
details, see "Chap. 18: Troubleshooting."
Estimated cause(s)
▶
• Make an adjustment by decrementing the response adjustment [HA115] by 5% each
time.
• Make an adj
time.
The control system has a frequency
• Make an adjustment
time.
• Make an adjustment by incrementing the IM motor constant J [Hb118] by 5% each
time.
• The performance may be improved by automatic tuning. Check "12.3.3 Auto
motor."
An improper phase sequence is
• Set V/f control (00) in [AA121], and check the frequency detection value monitor
[dA-08]. The wi
and if the reversal operation [RV] has a negative (
negative operations have incorrect values, rearrange the phase sequence in the
encoder or check again, "1
• The performance may be improved by automatic
motor."
17
If an application of load results in a great amount of
change in the inverter'
[dA-01], functions wich change
change the frequencies for the overload limiting
function, the momentary
the over voltage suppression function may work
depending upon the settings of the funct
details, see "Chap. 18: Troubleshooting."
Exemplar measures to be taken
Make an adjustment by decrementing the response adjustment [HA115] by 5% each
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5% each
Make an adjustment by incrementing the response adjustment [HA115] by 5% each
Make an adjustment by incrementing the IM motor constant J [Hb118] by 5% each
The performance may be improved by automatic tuning. Check "12.3.3 Auto
Set V/f control (00) in [AA121], and check the frequency detection value monitor
08]. The wiring is correct if the forward operation [FW] has a positive (+) value
and if the reversal operation [RV] has a negative (
negative operations have incorrect values, rearrange the phase sequence in the
encoder or check again, "1
The performance may be improved by automatic
If an application of load results in a great amount of
change in the inverter's output frequency monitor
functions wich change
change the frequencies for the overload limiting
function, the momentary-stop non
the over voltage suppression function may work
depending upon the settings of the funct
details, see "Chap. 18: Troubleshooting."
Exemplar measures to be taken
Make an adjustment by decrementing the response adjustment [HA115] by 5% each
ustment by decrementing the IM motor constant J [Hb118] by 5% each
by incrementing the response adjustment [HA115] by 5% each
Make an adjustment by incrementing the IM motor constant J [Hb118] by 5% each
The performance may be improved by automatic tuning. Check "12.3.3 Auto
Set V/f control (00) in [AA121], and check the frequency detection value monitor
ring is correct if the forward operation [FW] has a positive (+) value
and if the reversal operation [RV] has a negative (
negative operations have incorrect values, rearrange the phase sequence in the
2.9.17 Use encoder."
The performance may be improved by automatic
Inverter Function
If an application of load results in a great amount of
s output frequency monitor
functions wich change automatically
change the frequencies for the overload limiting
stop non-stop function,
the over voltage suppression function may work
depending upon the settings of the funct
details, see "Chap. 18: Troubleshooting."
Exemplar measures to be taken
Make an adjustment by decrementing the response adjustment [HA115] by 5% each
ustment by decrementing the IM motor constant J [Hb118] by 5% each
by incrementing the response adjustment [HA115] by 5% each
Make an adjustment by incrementing the IM motor constant J [Hb118] by 5% each
The performance may be improved by automatic tuning. Check "12.3.3 Auto
Set V/f control (00) in [AA121], and check the frequency detection value monitor
ring is correct if the forward operation [FW] has a positive (+) value
and if the reversal operation [RV] has a negative (-) value. If the forward and
negative operations have incorrect values, rearrange the phase sequence in the
2.9.17 Use encoder."
The performance may be improved by automatic tuning. Check "12.3.3 Auto
Inverter Function
If an application of load results in a great amount of
s output frequency monitor
automatically
change the frequencies for the overload limiting
stop function,
the over voltage suppression function may work
depending upon the settings of the functions. For
details, see "Chap. 18: Troubleshooting."
Exemplar measures to be taken
Make an adjustment by decrementing the response adjustment [HA115] by 5% each
ustment by decrementing the IM motor constant J [Hb118] by 5% each
by incrementing the response adjustment [HA115] by 5% each
Make an adjustment by incrementing the IM motor constant J [Hb118] by 5% each
The performance may be improved by automatic tuning. Check "12.3.3 Auto-tune
Set V/f control (00) in [AA121], and check the frequency detection value monitor
ring is correct if the forward operation [FW] has a positive (+) value
) value. If the forward and
negative operations have incorrect values, rearrange the phase sequence in the
tuning. Check "12.3.3 Auto-tune
Inverter Function
If an application of load results in a great amount of
s output frequency monitor
ions. For
Make an adjustment by decrementing the response adjustment [HA115] by 5% each
by incrementing the response adjustment [HA115] by 5% each