Yaskawa GPD503 Drive - Manual (Page 76)

2.26 SLIP COMPENSATION
bn-08: Slip Compensation Gain Factory setting: 0.0 %
Range: 0.0 to 9.9 %
This constant sets the slip compensation gain, in increments of 0.1%. When the gain is
1.0, the output frequency is increased by 1% of the Cn-04 setting at rated current. A
setting of 0.0 results in no slip compensation.
Fref
Cn-14
Cn-15
+
+
–
+
400 Hz
SFS
SOFT STARTER
10% LIMITATION
bn-08
INTERNAL
FREQUENCY
REFERENCE
20%
K
CURRENT
DETECTOR
NOTE: When Fref is less than Cn-07 setting, this function is disabled.
Slip Compensation Block Diagram
2-41
EXAMPLE :
Desired frequency is 45 Hz
Motor slip = 3% at full load
(bn-08 = 3.0 )
Actual output frequency at
full load = 46.35 Hz
V
f
46.35 Hz actual output
3% frequency
boost
corresponding
voltage boost
45 Hz command
Changed