YASKAWA SGM7D Product Manual page 39

The following Servomotor meets the selection conditions.
• SGMCV-17CEA11

Specifications of the Provisionally Selected Servomotor
Item
Rated Torque
Instantaneous Maximum Torque
Moment of Inertia (J
Allowable Load Moment of Inertia Ratio (J
7.
Verification of the Provisionally Selected Servomotor
• Verification of required acceleration torque:
( J L + J M ) × N O
T Ma =
9.55 × t p a
≈ 44.9 (N m) <
• Verification of required deceleration torque:
( J L + J M ) × N O
T Md = -
9.55 × t p d
≈ -44.9 (N m) <
• Verification of effective torque value:
× t p a + T L
T Ma
2
Trm =
≈ 14.2 (N m) < Rated torque...Satisfactory
t =Time of constant motor speed = t
c
8.
Result
It has been verified that the provisionally selected Servomotor is applicable.
The torque diagram is shown below.
Torque (N⋅m)
44.9
0.1 0.05
0.1 0.1
-44.9
2.0
17 (Nm)
51 (Nm)
)
0.00785 (kgm
M
) 25
R
(0.135 + 0.00785) × 300
=
9.55 × 0.1
Maximum instantaneous torque...Satisfactory
(0.135 + 0.00785) × 300
= -
9.55 × 0.1
Maximum instantaneous torque...Satisfactory
× t c + T Md × t p d
2 2
tf
– t – t
0 s
Time (s)
2.1 Selecting the Servomotor Capacity
Value
2
)
× 0.1 + 0 × 0.05 + (-44.9)
44.9 2 2
=
2
– t
psa psd
× 0.1
2
2
2-3