Hitachi SJ Series, User Manual

Page: 230 / 786

Chapter 12
•
•
Unsteady revolutions at low speeds,
re
The motor is hunting.
Chapter 12
• Set the carrier frequency [bb101] at a value of
kHz or higher. A set frequency of 1.9 kHz or lower
may cause hunting.
• 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
improves the state, checking the portion around the
motor may sometimes improves it.
！
Phenomenon
Socks occur during the
revolutions at the start.
Unsteady revolutions at low speeds,
resulting in fluctuating revolutions.
When a load in the motor
direction is applied to the motor, the
revolution frequency becomes lower.
When a load in the motor
direction is applied to the motor, the
revolution frequency becomes higher.
When a load in the motor
direction is applied to the motor, the
revolution frequency becomes
higher.
Revolution in the opposite direction to
the command direction occurs for an
instant.
The motor is hunting.
Chapter 12
Set the carrier frequency [bb101] at a value of
kHz or higher. A set frequency of 1.9 kHz or lower
may cause hunting.
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
improves the state, checking the portion around the
motor may sometimes improves it.
Phenomenon
Socks occur during the
revolutions at the start.
Unsteady revolutions at low speeds,
sulting in fluctuating revolutions.
When a load in the motor-stopping
direction is applied to the motor, the
revolution frequency becomes lower.
When a load in the motor-stopping
direction is applied to the motor, the
revolution frequency becomes higher.
When a load in the motor-stopping
direction is applied to the motor, the
revolution frequency becomes
Revolution in the opposite direction to
the command direction occurs for an
The motor is hunting.
Set the carrier frequency [bb101] at a value of
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
improves the state, checking the portion around the
motor may sometimes improves it.
Estimated cause(s)
• The control system has a speed
response that is too high.
• The control system has a speed
response that is too low.
• The motor constant R2 is set at too
small a value.
revolution frequency becomes higher.
• The motor constant R2 is set at too
large a value.
• Insufficient regenerative torque at
low speeds.
Revolution in the opposite direction to
the command direction occurs for an
• A command demanding the
revolution in the opposite direction
is dispatched over the control
system for an instant.
• The control system has a speed
response that is too low.
Set the carrier 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 speed
response that is too high.
The control system has a speed
response that is too low.
The motor constant R2 is set at too
small a value.
The motor constant R2 is set at too
large a value.
Insufficient regenerative torque at
low speeds.
A command demanding the
revolution in the opposite direction
is dispatched over the control
system for an instant.
The control system has a speed
response that is too low.
12-9-13
2.0
kHz or higher. A set frequency of 1.9 kHz or lower
When the revolution of the motor is hindered by
objects may cause over current or the 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's output frequency monitor
[dA
change the frequencies for the overload limiting
function, the momentary
the over voltage suppression function may work
depending upon the settings of the functions. For
details, see "Chap. 18: Tips/FAQ/Tro
The control system has a speed
• Make an adjustment by decrementing the respon
5% each time.
• Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
each time.
• Make an adjustment by decrementing the boost amount at the start [HC111]
by 5% each time.
The control system has a speed
• Make an adjustment by incrementing the response adjustment [HA115] by 5% each
time.
• Make an adjustment by incrementing the IM motor constant J [Hb118] by 5
time.
The motor constant R2 is set at too • Make an adjustment by incrementing the IM motor constant R2 [Hb112] by 5% of
current value each time.
The motor constant R2 is set at too • Make an adjustment by decrementing the IM motor constant R
current value each time.
Insufficient regenerative torque at
• Make an adjustment by incrementing the IM m
current value each time.
• Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
current value each time.
revolution in the opposite direction
• Enable the reversal prevention selection [HC114].
The control system has a speed
• Make an adjustment by decrementing the response adjustment [HA115] by 5% each
time.
• Make an adjustment by decrementing the IM motor constant J [Hb118] by 5
time.
13
If an application of load results in a great amount of
change in the inverter's output frequency monitor
[dA-01], functions
change the frequencies for the overload limiting
function, the momentary
the over voltage suppression function may work
depending upon the settings of the functions. For
details, see "Chap. 18: Tips/FAQ/Tro
Exemplar measures to be taken
Make an adjustment by decrementing the respon
5% each time.
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
each time.
Make an adjustment by decrementing the boost amount at the start [HC111]
by 5% each time.
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
Make an adjustment by incrementing the IM motor constant R2 [Hb112] by 5% of
current value each time.
Make an adjustment by decrementing the IM motor constant R
current value each time.
Make an adjustment by incrementing the IM m
current value each time.
Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
current value each time.
Enable the reversal prevention selection [HC114].
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
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 functions. For
details, see "Chap. 18: Tips/FAQ/Tro
Exemplar measures to be taken
Make an adjustment by decrementing the respon
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
Make an adjustment by decrementing the boost amount at the start [HC111]
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
Make an adjustment by incrementing the IM motor constant R2 [Hb112] by 5% of
Make an adjustment by decrementing the IM motor constant R
Make an adjustment by incrementing the IM m
Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
Enable the reversal prevention selection [HC114].
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
Inverter Function
If an application of load results in a great amount of
change in the inverter's output frequency monitor
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 functions. For
details, see "Chap. 18: Tips/FAQ/Troubleshooting."
Exemplar measures to be taken
Make an adjustment by decrementing the response adjustment [HA115] by
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
Make an adjustment by decrementing the boost amount at the start [HC111]
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
Make an adjustment by incrementing the IM motor constant R2 [Hb112] by 5% of
Make an adjustment by decrementing the IM motor constant R2 [Hb112] by 5% of the
Make an adjustment by incrementing the IM motor constant R1 [Hb110] by 5% of the
Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
Enable the reversal prevention selection [HC114].
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
Inverter Function
If an application of load results in a great amount of
change in the inverter'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
ubleshooting."
Exemplar measures to be taken
se adjustment [HA115] by
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
Make an adjustment by decrementing the boost amount at the start [HC111]
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
Make an adjustment by incrementing the IM motor constant R2 [Hb112] by 5% of the
2 [Hb112] by 5% of the
otor constant R1 [Hb110] by 5% of the
Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
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
Inverter Function
If an application of load results in a great amount of
change in the inverter's output frequency monitor
depending upon the settings of the functions. For
ubleshooting."
Make an adjustment by decrementing the IM motor constant J [Hb118] by 5%
Make an adjustment by incrementing the response adjustment [HA115] by 5% each
the
2 [Hb112] by 5% of the
otor constant R1 [Hb110] by 5% of the
Make an adjustment by incrementing the IM motor constant I0 [Hb116] by 5% of the
Make an adjustment by decrementing the response adjustment [HA115] by 5% each