Hitachi SJ Series User Manual page 359

Chapter 12
12.16.7 Avoiding mechanical resonance of
motor and machine
Q
Having been assembled to the system, the motor
•
vibrates when operated at a constant speed.
A
Use the jump frequency function to operate the
•
inverter while avoiding resonance points on the
load-machine system.
A jump frequency can be set at 3 points.
•
Parameter
Item
Jump frequency 1
Jump frequency 2
Jump frequency 3
Jump frequency
width 1
Jump frequency
width 2
Jump frequency
width 3
Setting examples
Output
frequency
[AG105]
[AG103]
[AG101]
Parameter
[AG101]
[AG103] 0.00~590.00(Hz)
[AG105]
[AG102]
[AG104] 0.00~10.00(Hz)
[AG106]
[AG106]
[AG106]
[AG104]
[AG104]
[AG102]
[AG102]
Frequency command
12-16-10
!
The jump frequency function is a function to
•
prevent output within the specified frequency
command range. When a frequency command
that is within the range of the jump frequency
function is input, the output is automatically limited.
While the output is limited, the LIM icon will be
displayed.
The output frequency within the range of the jump
•
frequency command fluctuates continuously
according to normal the acceleration/deceleration
time.
Data
Sets the center of the frequency range at
which to execute a jump If 0.00 Hz is set,
the jump frequency function is disabled.
Set one-half of the frequency width in which
to execute a jump. Frequencies that fall in
the range of a jump frequency±jump width
will be jumped.
Inverter Function
Description