Hitachi SJ Series User Manual page 232

Chapter 12 Chapter 12 Chapter 12
• In addition to the adjustment of the sensorless • In addition to the adjustment of the sensorless In addition to the adjustment of the sensorless In addition to the adjustment of the sensorless
vector control, refer to the following description. vector control, refer to the following description. vector control, refer to the following description. vector control, refer to the following description. vector control, refer to the following description.
Phenomenon Phenomenon
Socks occur during the revolutions at Socks occur during the revolutions at Socks occur during the revolutions at Socks occur during the revolutions at
the start. the start.
Over current occurs at the start Over current occurs at the start Over current occurs at the start
The motor cannot provide enough The motor cannot provide enough The motor cannot provide enough
torque for the load is too high for the torque for the load is too high for the torque for the load is too high for the
motor to at the start. motor to at the start. motor to at the start.
Acceleration is not possible. Acceleration is not possible. Acceleration is not possible.
！
• • Set the carrier fre Set the carrier frequency [bb101] at a value of 2.0 quency [bb101] at a value of 2.0 quency [bb101] at a value of 2.0 quency [bb101] at a value of 2.0
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 above djustment as ones mentioned above djustment as ones mentioned above djustment 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)
• Boost amount is too large. Boost amount is too large.
• Boost amount is too small. Boost amount is too small.
12-9-15
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 zero Make an adjustment by decrementing the zero Make an adjustment by decrementing the zero Make an adjustment by decrementing the zero-speed range limiter [HC110] by 5%
each time. each time.
• Make an adjustment by decrementing the zero n adjustment by decrementing the zero n adjustment by decrementing the zero n adjustment by decrementing the zero-speed range boost at the start
[HC112] by 5% each time. [HC112] by 5% each time.
• Make an adjustment by incrementing the zero Make an adjustment by incrementing the zero- Make an adjustment by incrementing the zero
[HC112] by 5% each time. [HC112] by 5% each time.
• 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 wich change [dA functions wich change functions wich change automatically
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: details, see "Chap. 18: Troubleshooting." details, see "Chap. 18:
15
Inverter Function Inverter Function Inverter Function
speed range limiter [HC110] by 5%
speed range boost at the start
-speed range boost at the start speed range boost at the start
automatically
stop non-stop function, stop function,
Troubleshooting." Troubleshooting."