Hitachi SJ Series User Manual page 230

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