Fuji Electric ALPHA7, User Manual

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CHAPTER 10 PERIPHERAL EQUIPMENT
10-6
Cable Size
10
10.2.3 How to Calculate the Servo Amplifier Input Current
Calculate the servo amplifier input current in the following equation to select peripheral equipment.
Formula
Input current (single-phase 200 [V]): Iin = (Po + Pi) / (Vac × 1.35 × ηamp × ηmot) × 1.27 × √3
Input current (3-phase 200 [V]): Iin = (Po + Pi) / (Vac × 1.35 × ηamp × ηmot) × 1.27
ηamp (amplifier efficiency) = 0.95 and ηmot (motor efficiency) = 0.90 are common among all
models.
 In case of single-phase 200V
Servo
amplifier
capacity
(Po)
[W]
Input voltage
(Vac)
[V]
Internal power
consumption
(Pi)
[W]
Input current
(Iin)
[A]
Input current for
selection of peripheral
equipment
(Iin×1.5) [A]
50
190
*
15
0.7 1.0
100 1.2 1.7
200 2.2 3.2
400 4.2 6.2
750 7.7 11.5
*-5% of 200V
 In case of 3-phase 200V
Servo
amplifier
capacity
(Po)
[W]
Input voltage
(Vac)
[V]
Internal power
consumption
(Pi)
[W]
Input current
(Iin)
[A]
Input current for
selection of peripheral
equipment
(Iin×1.5) [A]
50
170
*
15
0.4 0.6
100 0.7 1.1
200 1.4 2.1
400 2.7 4.0
750 5.0 7.4
1000 6.6 9.8
1500 9.8 14.7
*-15% of 200V