IMPULSE•G+ Mini Advanced Instruction Manual – March 2014
5-40
Hunting Prevention
Occasionally, in an application, resonance between the internal control system and the mechanical
system causes current instability. This is called hunting, and may cause a crane to vibrate at a lower
speed (up to 30 Hz) and light load. The hunting prevention function monitors the motor flux and uses
a special control circuit to “smooth out” any peaks in the output current wave form.
Increase the set value of D11.02 when hunting is present while driving a light load. Decrease the set
value of D11.02 when the motor vibrates or stalls while driving a heavy load.
Parameter
Code Name Function Range
Initial
Value
Control
Method
Access
Level
D11.01 Hunt Prevention Selection Enable/Disable Hunt Prevention function
00 Disable
01 Enable
00, 01 01 V/f Adv
D11.02 Hunt Prevention Gain Hunting Prevention Gain 0.00–2.50 1.00 V/f Adv
D11.03 Hunt Prevention Time
Constant
Hunting Prevention Time Constant 000–500ms 10 V/f Adv
D11.05 Hunt Prevention Gain in
Reverse
Reverse Hunting Prevention Gain 0.00–2.50 0.00 V/f Adv
To Next Page
Loading...
