YASKAWA SGDH User Manual page 246

4 SERVOPACK Specifications and Dimensional Drawings
4.5.3 Load Moment of Inertia
Servomotor
Model
SGMPH
SGMGH (1500 min
SGMGH (1000 min
SGMSH
SGMDH
SGMUH
(4) Overhanging Loads
A servomotor may not be operated with an overhanging load, which tends to continuously rotate the motor. Fig.
4.1 shows a typical example of such a load.
• DO NOT use the servomotor with the Vertical Axis Motor Drive without Counterweight
• DO NOT use the servomotor with the Feeding Motor Drive
Servomotor rotated repeatedly at a
constant speed to maintain the tension.
• Never operate servomotors with an overhanging load. Doing so will cause the SERVOPACKs' regenerative
IMPORTANT
• The regenerative brake capacity of the SGDH SERVOPACKs is rated for short-term operation approxi-
Capacity Range
100 W
200 W
400 W
750 W, 1.5 kW
450 W to 15 kW
-1
)
300 W to 5.5 kW
-1
)
1.0 kW to 5.0 kW
2.2 kW to 4.0 kW
1.0 kW to 4.0 kW
Servomotor
Tension
Servomotor
Fig. 4.1 Examples of Overhanging Loads
brake to be applied continuously and the regenerative energy of the load may exceed the allowable range
causing damage to the SERVOPACK.
mately equivalent to the time it takes to decelerate to a stop.
Allowable Load Moment of Inertia
(Rotor Moment of Inertia Ratio)
× 25
× 15
× 7
× 5
× 5
× 5
× 5
× 5
× 5
Servomotor
4-22