Specifications

51
Constant Descriptions
6. Reduce Motor Speed Fluctuation
Control Motor Slip
Slip compensation gain C3-01
Speed control (ASR) proportional (P) gain 1 C5-01
ASR proportional (P) gain 2 C5-03
ASR integral (I) time 1, 2 C5-02，C5-04
As the load becomes larger, the motor slip amount
becomes larger, resulting in reduction of the motor speed.
The slip offset function controls the motor speed at a
constant rate even when the load changes.
The inverter adds frequency equivalent to the slip of the
motor to the output frequency according to the load.
Control with PG is accomplished by directly detecting the
motor speed by the PG (detector), thus allowing higher
precision in the operation.
Set the speed control proportional gain (C5-01) and integral
time (C5-02) at the maximum output frequency.
Set the speed control proportional gain (C5-03) and integral
time (C5-04) at the minimum output frequency.
Normally, C5-03 and C5-04 do not have to be set.
・Control without PG
Load Torque
Torque
Speed
(Small Load) (Large Load)
f
1 f 2
Proportional Gain
Output Frequency
C5-01
C5-03
0 ％ 100 ％
Integral Time
Output Frequency
C5-02
C5-04
0 ％ 100 ％
Relation between Output Frequency and Proportional Gain or Integral Time
E2-01
E2-02
E2-03
C3-01
Motor rated current
Motor rated slip
Motor no-load current
Slip compensation gain
＊2
＊2
＊2
0 to 2.5
0.00 to 1500.0 A
0.00 to 20.00 Hz
0.00 to 1500.0 A
Constant No. Name Setting Range Initial Value
1.0
＊1
・Control with PG
C5-02
C5-03
C5-04
C5-01
ASR integral time 1
ASR proportional gain 2
ASR integral time 2
ASR proportional gain 1
0.500
＊4
20.00
＊4
20.00
＊4
0.500
＊4
1.00 to 300.00
＊3
0.000 to 10.000 s
1.00 to 300.00
＊3
0.000 to 10.000 s
E2-04
Number of motor poles 42 to 48
F1-01
PG constant (P/R) 6000 to 60000
＊1 When using V/f control without PG, the initial value is 0.0
(without slip compensation).
＊2 Initial value differs according to the inverter kVA setting or motor selection.
＊3 When using V/f control with PG, the setting range is 0.00 to 300.00.
＊4 Initial values of V/f control with PG are C5-01=0.20, C5-02=0.20 s, C5-03=0.02,
C5-04=0.05 s.
Constant No. Name Setting Range Initial Value
Cont
,
d