Yaskawa Sigma II Series SGMVH - Manual (Page 305)

11.1 Servomotor Capacity Selection Examples
11-3
11
Appendix
(5) Load Moving Power
(6) Load Acceleration Power
(7) Servomotor Provisional Selection
(a) Selecting Conditions
• T
L
≤ Motor rated torque
• Pa + Po = (1 to 2) × Motor rated output
• N
M
≤ Motor rated speed
• J
L
≤ SERVOPACK allowable load moment of inertia
The followings satisfy the conditions.
• SGMGH-09A2A21 servomotor
• SGDH-10AE SERVOPACK
(b) Specifications of the Provisionally Selected Servomotor and SERVOPACK
• Rated output: 850 (W)
• Rated motor speed: 1500 (min
-1
)
• Rated torque: 5.39 (N ⋅m)
• Instantaneous peak torque: 13.8 (N ⋅m)
• Servomotor moment of inertia: 13.9 × 10 -4
(kg ⋅m 2
)
• SERVOPACK allowable load moment of inertia: 69.58 × 10 -4
(kg ⋅m 2
)
(8) Verification on the Provisionally Selected Servomotor
• Required starting torque
• Required braking torque
• Torque efficiency
P
O
= = = 272 (W)
2πN
M
T
L
60
2π × 1500 × 1.73
60
P
a
=
(
N
M
) 2
=
(
× 1500
) 2
= 1108 (W)
2π
60 2π
60 J
L
ta
44.9 × 10 -4
0.1
T = + T = + 1.73
60ta 60 × 0.1
2
π
N (J + J ) 2
π × 1500 × (13.9 + 44.9) × 10
P
−4
M M L
L
11 (N m) < Instantaneous peak torque Satisfactory
T = − T = − 1.73
60td 60 × 0.1
2
π
N (J + J ) 2
π × 1500 × (13.9 + 44.9) × 10
S
−4
M M L
L
7.5 (N m) < Instantaneous peak torque Satisfactory
T = =
t
Τ ta + T tc + T td
r m s
P L S
3.72 (N m) < Rated torque Satisfactory
2 2 2
1.5
(11)
× 0.1 + (1.73) × 1.0 + (7.5) × 0.1 2 2 2