Yaskawa VS-616G5 Series Revision F Programming Manual - Manual (Page 43)

VS-616G5 Programming Manual 43
V/f V/f w/PG Open Loop
Vector
Flux
Vector
Setting Range: 0 to 99
Factory Default: 0
Note: An OPE11 fault occurs if either of the following conditions is present:
1. C6-03 > 6kHz and C6-02 > C6-01
2. C6-01 > 5kHz and C6-02
≤
5kHz
C7 Hunting Prevention
Occasionally, in an application, resonance between the internal control system and the mechanical sys-
tem causes current instability. This instability is called hunting, and may cause the machine to vibrate
at lower speeds (up to 30Hz). The hunting prevention function monitors the motor flux and uses a spe-
cial control circuit to “smooth out” any peaks in the output current waveform.
Enables the hunting prevention function in V/f control mode.
Setting Range: 0.00 to 2.50
Factory Default: 1.00
Sets hunting prevention gain in units of 0.01. When hunting is present while driving a light load,
increase the set value in one tenth (0.1) increments. When the motor vibrates or stalls while driving a
heavy load, decrease the set value.
C6-03 Carrier Proportional Gain CarrierFreq Gain A A - -
C7-01 Hunting Prevention Selection Hunt Prev Select A A − −
Setting Description
0 Hunting prevention is disabled.
1 Hunting prevention is enabled (factory default).
C7-02 Hunting Prevention Gain Hunt Prev Gain A A − −
C6-01
C6-02
Fout × C6-03 × K*
Fout
Carrier
Figure 23 Carrier Frequency Setting
Output Frequency
Frequency
* K varies depending on the carrier frequency upper limit (C6-01):
C6-01 > 10.0kHz K = 3
10.0kHz > C6-01 > 5.0kHz K = 2
C6-01 < 5.0kHz K = 1
Section C: Tuning Parameters
C7 Hunting Prevention