Yaskawa VS mini J7 Series - Manual (Page 93)

93
• Decreasing Motor Speed Fluctuation
As the load becomes larger, rotor speed is reduced as motor slip increases. The slip
compensating function regulates the motor shaft speed as the load increases by
increasing the output frequency.
When inverter output current is equal to the motor rated current (n32), the
compensation frequency is added to the output frequency.
Parameters
* Differs depending on inverter capacity.
Notes:1. Slip compensation is not performed in the following condition:
Output frequency < minimum output frequency (n14).
2. Slip compensation is not performed during regeneration.
3. Slip compensation is not performed when motor rated current (n32) is set to 0.0A.
Slip compensation
Parameters
No.
Name Unit Setting Range
Initial
Setting
n032 Motor rated current 0.1A 0 to 120% of inverter rated current *
n64 Motor rated slip 0.1Hz 0.0 to 20Hz *
n65 Motor no-load current 1% 0 to 99% (100% = Motor rated current n32) *
n66 Slip compensation gain 0.1 0.0 to 2.5 0.0
n67
Slip compensation primary
delay time
0.1s
0.0 to 25.5s
When 0.0s is set, delay time becomes 2.0s
2.0s
Compensation frequency Motor rated slip (n64) =
Output current Motor no-load current n65 –
Electronic thermal
reference current (n32)
Motor no-load current (n65) –
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×
Slip compensation gain (n66)
×