FujiFilm ALPHA 5 RYT-SX, User Manual

Page: 539 / 547

CHAPTER 14 APPENDIXES
Capacity Selection Calculation
14-27
14
[4] Calculate the energy (E
S
) that can be absorbed by the servo amplifier.
DC link capacity (RYT201): 300 [
µ
F], source voltage 200 [V] (actual value)
The capacitor of 0.2 [kW] or smaller capacity servo amplifiers is 300 [
µ
F].
V
DB
: DB transistor activation level (390 [V]). V
DC
: DC link voltage (200 x √ 2 [V])
The energy that can be processed by the mechanical system, servo amplifier and servomotor is:
E
L
+ E
M
+ E
S
= 0.24 + 1.2 + 10.8 ≈ 12.2 [J]
Because E
G
= 6.1 [J], no external braking resistor is necessary.
1
2
C (V
DB
2
- V
DC
2
)
E
S
=
= 10.8 [J]
(300 × 10
-6
) × (390
2
- (200 × √ 2)
2
)
=
1
2