YASKAWA SGM7J-A5A, Technical Supplement

Page: 169 / 622

Rotary Servo Motors
SGM7G
151
Rotary Servo Motors
Note: The values in parentheses are for Servo Motors with Holding Brakes (indicated by value of  in model numbers).
*1. The gear efficiency depends on operating conditions such as the output torque, motor speed, and temperature.
*2. The gear motor output torque is expressed by the following formula: Output Torque = (Servo Motor Output Torque) x (Gearing Ratio) x
(Gearing Efficiency). The values in the table are typical values for the rated torque, rated motor speed, and a surrounding air tempera-
ture of 25°C. They are reference values only.
*3. The output torque of the gear motor is limited by the mechanical limit of the gear head. Operation above this limit could result in prema-
ture failure of the gear motor.
75B  -VL155-03
75A6A6 
3:1
95
500 1000 137 339
125.0
(133.0)
35.0
9100 8200
5 IP65
75B  -VL155-05 5:1 300 600 228 565 27.0
75B  -VL205-10 10:1 150 300 456
970
*3 27.0
15000 14000 75B  -VL235-25 25:1
92
40
*3
80
*3
1104
2300
*3
33.0
75B  -VL235-50 50:1
20
*3
40
*3
1500
*3
2300
*3 26.0
During operation of the gear motor, lo ss e s due to inefficiencie s of the gearing mechani s m are generated. The
lo ss e s vary a s the condition s for gear motor torque and s peed change. Temperature ri s e can vary ba s ed on
the mechanical inefficiencie s and the heat di ss ipation condition s . For heat di ss ipation condition s , check the
gear and motor temperature s with the actual equipment. If operating temperature s are too high, implement
the following mea s ure s .
•
Decrea s e the load ratio.
•
Change the heat di ss ipation condition s .
•
U s e forced-air cooling for the motor with a cooling fan or other mean s .
•
Plea s e refer to "Sigma-7 Gearmotor Temperature Te s t Data" (document number PN.GearMotor s .01) on
ya s kawa.com for temperature te s t data.
Gear Motor
Model Number
S7G____
Base
Servo
Motor
Model
SGM7G-
Gear
Ratio
Gearing
Efficiency
*1
Rated
Speed
(RPM)
Max
Speed
(RPM)
Rated
Torque
(Nm)
*2
Peak
Torque
(Nm)
*2
Motor
Inertia
(x10
-4
kg-m
2
)
Gearhead
Inertia
(x10
-4
kg-m
2
)
Allow-
able
Radial
Load
(N)
Allow-
able
Axial
Load
(N)
Back-
lash
(arc-
min)
Class
Important