YASKAWA VS MINI J7 Instruction Manual download pdf (Page 81)

 Decreasing Motor Speed Fluctuation

 Slip Compensation

As the load becomes larger, the motor speed is reduced and the motor

slip value is increased. The slip compensating function controls the

motor speed at a constant value even if the load varies.

When the Inverter output current is equal to the Motor Rated Current

(n32), the compensation frequency is added to the output frequency.

Related Constants

* Depends on Inverter capacity.

Note: 1. Slip compensation is not performed under the following condition:

Output frequency < Minimum Output Frequency (n14)

2. Slip compensation is not performed during regeneration.

3. Slip compensation is not performed when the Motor Rated Current

(n32) is set to 0.0 A.

Constant

No.

Name Unit Setting Range Initial

Setting

n32 Motor Rated Current 0.1 A 0% to 120% of Inverter

rated current

n64 Motor Rated Slip 0.1 Hz 0.0 to 20 Hz *

n65 Motor No-load Current 1% 0% to 99% (100%=Mo-

tor Rated Current n32)

n66 Slip Compensation

Gain

0.1 0.0 to 2.5 0.0

n67 Slip Compensation

Time Constant

0.1 s 0.0 to 25.5 s

When 0.0 s is set, delay

time is 2.0 s.

2.0 s

Output current − Motor no-load current (n65)

Motor rated current (n32) − Motor no-load current (n65)

Slip compensation gain (n66)

Compensation frequency = Motor rated slip (n64)

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 137 138

No comments

YASKAWA VS MINI J7 Instruction Manual Page 81