Fuji Electric ALPHA5 Smart, User Manual

Page: 614 / 636

CHAPTER 15 APPENDIXES
15-22
Capacity Selection Calculation
15
(6) Creating the torque pattern
Create the pattern of the output torque according to the operation pattern.
(7) Calculating the effective torque (T
rms
)
Calculate the effective torque of each cycle of the operation pattern.
Obtain the sum of each of the product of the squared output torque multiplied by the output time
and divide the sum by the cycle time, and obtain the square root of the result.
(8) T
rms
≤ T
R
If the effective torque is equal to or smaller than the rated torque, continuous operation in the
designated operation pattern is possible.
(T
AC
2
× t
AC
) + (T
L
2
× t
L
) + (T
DC
2
× t
DC
)
t
CYC
T
rms
=
Travel
speed
Time
Output
torque
Time
T
AC
: Acceleration torque
T
L
: Load torque
t
AC
t
L
t
DC
t
cyc
・
Operation pattern
・ Torque pattern
T
DC
: Deceleration torque