YASKAWA CIMR-G5A Series - Motor Slip Compensation: C3-01 to C3-04; Setting S-Curve Characteristics; Slip Compensation Gain: C3-01

7.5 Common Functions
7-53
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C2-01
S-curve characteris-
tic time at accelera-
tion start
×
0.00 to 2.50 s 0.20
A A A A
C2-02
S-curve characteris-
tic time at accelera-
tion end
×
0.00 to 2.50 s 0.20
A A A A
C2-03
S-curve characteris-
tic time at decelera-
tion start
×
0.00 to 2.50 s 0.20
A A A A
C2-04
S-curve characteris-
tic time at decelera-
tion end
×
0.00 to 2.50 s 0.00
A A A A
D
The relation between these constants is shown in Figure 7.27.
Output
frequency
C2-01
C2-02 C2-03
C2-04
Time
Run command
OFFON
Fig 7.27 Setting S-curve Characteristics
D
When the S-curve characteristic time is set, the acceleration and deceleration times will be lengthened
as follows:
•
Acceleration time =
Selected acceleration time + (S-curve at beginning of acceleration + S-curve at end of acceleration)
/2
• Deceleration time =
Selected deceleration time + (S-curve at beginning of deceleration + S-curve at end of decelera-
tion) / 2
J
Motor Slip Compensation: C3-01 to C3-04
D
The motor slip compensation function calculates the motor torque according to the output current, and
sets gain to compensate for output frequency.
•
This function is used to improve speed accuracy when operating with a load. It is mainly effective
with V/f control (without PG).
Slip Compensation Gain: C3-01
User
Change
during
Setting
Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C3-01
Slip compensation
gain
f 0.0 to 2.5
Mul-
tiple
1.0 *
B
×
B B
* When the control method is switched, the factory setting changes as follows:
V/f control: 0.0; V/f with PG: 1.0; open-loop vector 0; flux vector: 1.0
• When “1.0” is set, this function compensates for the rated slip that has been set, by the rated torque
output.
• With flux vector control, this becomes the gain to compensate for slip caused by motor temperature
variation. (Refer to Slip Compensation Gain: C3-01 under 7.3.6.)
7