Improved Operating Efficiency; Reducing Motor Speed Fluctuation (Slip Compensation Function) - YASKAWA CIMR-ACA4011 Instruction Manual

Improved Operating Efficiency

This section explains functions for improving motor operating efficiency.

Reducing Motor Speed Fluctuation (Slip Compensation Function)

With larger loads, the amount of motor slip increases while to motor speed decreases. The slip compensation
function controls the motor at a constant speed, regardless of changes in load. When the motor is operating at
the rated load, parameter E2-02 (Motor Rated Slip) × the frequency in parameter C3-01 is added to the output
frequency.
Related Parameters
Parameter
Number
C3-01
C3-02
C3-03
C3-04
C3-05
* The default will change when the control method is changed. The values in the table above are the defaults when using Open Loop Vector Control.
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6
Name
Display
Slip Compensa- This parameter is used to increase motor
tion Gain speed to account for motor slip by boosting
the output frequency. If the speed is lower
than the frequency reference, increase C3-01.
If the speed is higher than the frequency refer-
ence, decrease C3-01.
Slip Comp Gain
Note: Adjustment is not normally required.
When operating in Open Loop Vector,
this parameter works as a function to
set the proper amount of gain.
Slip Compensa-
This parameter adjusts the filter on the output
tion Primary Delay
of the slip compensation function. Increase to
Time
add stability, decrease to improve response.
Slip Comp Time
Slip Compensa-
This parameter sets the upper limit for the slip
tion Limit
compensation function. It is set as a percent-
age of motor rated slip (E2-02).
Slip Comp Limit
Slip Compensa- Determines whether slip compensation is
tion Selection Dur- enabled or disabled during regenerative oper-
ing Regeneration ation.
0: Disabled.
Slip Comp Regen
1: Enabled.
Output Voltage Determines if the motor magnetic flux is auto-
Limit Operation matically decreased when output voltage satu-
Selection ration occurs.
0: Disabled.
V/f Slip Cmp Sel
1: Enabled.
Setting
Description
Range
0.0 to
2.5
0 to
10000
0 to
250
0 or 1
0 or 1
Control Methods
Change
Open
Default during
V/f Loop
Run
Vector
1.0* Yes A A
200 ms
No A A
*
200% No A A
0 No A A
0 No No A
Flux
Vector
A
No
No
No
A