Yaskawa Sigma II Series SGMVH - Manual (Page 74)

4 SERVOPACK Specifications and Dimensional Drawings
4.5.3 Load Moment of Inertia
4-14
4.5.3 Load Moment of Inertia
The larger the load moment of inertia, the worse the movement response of the load.
The size of the load moment of inertia (J
L
) allowable when using a servomotor is limited to within 5 times the
moment of inertia of each servomotor (J
M
).
An overvoltage alarm is likely to occur during deceleration if the load moment of inertia exceeds the 5 times of
load moment of inertia. Take one of the following steps if this occurs.
• Reduce the torque limit.
• Reduce the deceleration rate.
• Reduce the maximum motor speed.
If the alarm cannot be cleared, contact your Yaskawa Application Engineering Department.
(1) Allowable Load Moment of Inertia at the Motor Shaft
The rotor moment of inertia ratio is the value for a servomotor without a gear and a brake.
Servomotor Model
Allowable Load Moment of Inertia
（ ×10 -4 kg·m 2 ）
1500 min
-1
Series
SGMVH-2BA†B 1830
SGMVH-3ZA†B 2490
SGMVH-3GA†B 2975
SGMVH-2BD†B 1830
SGMVH-3ZD†B 2490
SGMVH-3GD†B 2975
SGMVH-4ED†B 5355
SGMVH-5ED†B 6450
SGMVH-7ED†B 9020
800 min -1 Series
SGMVH-2BA†D 3525
SGMVH-3ZA†D 6450
SGMVH-3GA†D 7820
SGMVH-2BD†D 3525
SGMVH-3ZD†D 6450
SGMVH-3GD†D 7820
SGMVH-4ED†D 9020