Load Moment Of Inertia - YASKAWA E-II Series User Manual

4 SERVOPACK Specifications and Dimensional Drawings

4.5.3 Load Moment of Inertia

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
moment of inertia of each servomotor (J
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.
1500 min
-1
800 min
4-14
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Servomotor Model
SGMVH-2BA B
SGMVH-3ZA B
SGMVH-3GA B
SGMVH-2BD B
-1
SGMVH-3ZD B
Series
SGMVH-3GD B
SGMVH-4ED B
SGMVH-5ED B
SGMVH-7ED B
SGMVH-2BA D
SGMVH-3ZA D
SGMVH-3GA D
SGMVH-2BD D
Series
SGMVH-3ZD D
SGMVH-3GD D
SGMVH-4ED D
) allowable when using a servomotor is limited to within 5 times the
L
).
M
Allowable Load Moment of Inertia
（×10
-4 2
kg·m
）
1830
2490
2975
1830
2490
2975
5355
6450
9020
3525
6450
7820
3525
6450
7820
9020