YASKAWA Varispeed G7 Series Instruction Manual page 156

Motor Slip Compensation: C3
User constants for slip compensation are shown in the following table.
Con-
stant
Number
Slip compen-
sation gain
C3-01
Slip Comp
Gain
Slip compen-
sation pri-
mary delay
time
C3-02
Slip Comp
Time
Slip compen-
sation limit
C3-03
Slip Comp
Limit
Slip compen-
sation selec-
tion during
regeneration
C3-04
Slip Comp
Regen
Output volt-
age limit
operation
C3-05
selection
Output V
limit
* The factory setting will change when the control method is changed. The open-loop vector 1 factory settings are given.
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5
Name
Description
Display
Used to improve speed accu-
racy when operating with a
load.
Usually setting is not neces-
sary.
Adjust this constant at the fol-
lowing times.
• When actual speed is low,
increase the set value.
• When actual speed is high,
decrease the set value.
Used as the applicable control
gain when using flux vector
control.
Slip compensation primary
delay time is set in ms units.
Usually setting is not neces-
sary.
Adjust this constant at the fol-
lowing times.
• Reduce the setting when
slip compensation respon-
sive is slow.
• When speed is not stabi-
lized, increase the setting.
Sets the slip compensation
limit as a percentage of motor
rated slip.
0: Disabled.
1: Enabled.
When the slip compensation
during regeneration function
has been activated, as regen-
eration capacity increases
momentarily, it may be neces-
sary to use a braking option
(braking resistor, Braking
Resistor Unit or Braking
Unit.)
0: Disabled.
1: Enabled. (The motor flux
will be lowered automati-
cally when the output
voltage become satu-
rated.)
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f with
tion
0.0 to
1.0* Yes A
2.5
0 to
200 ms
No A
10000
*
0 to
200% No A
250
0 or 1 0 No A
0 or 1 0 No No
MEMO-
Open Open
BUS
V/f Loop Flux Loop
Regis-
Vec- Vec- Vec-
ter
PG tor tor tor
1 2
No A A No 20FH
No A No No 210H
No A No No 211H
No A No No 212H
No A A No 213H
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