YASKAWA SGM7J-A5A, Техническое дополнение

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Appendices
Capacity Selection for Servo Motors
579
Appendices
Servo Motor Capacity Selection Example for Linear Servo Motors
1.
Mechanical Specifications
2.
Operation Pattern
3.
Steady-State Force (Excluding Servo Motor Moving Coil)
F
L
= {9.8



(m
W
+ m
T
)} + F = 9.8

0.2

(1 + 2) + 0 = 5.88 (N)
4.
Acceleration Force (Excluding Servo Motor Moving Coil)
5.
Provisional Selection of Linear Servo Motor

Selection Conditions
• F
P

Maximum force

0.9
• F
s

Maximum force

0.9
•
F
rms

Rated force  0.9
The following Servo Motor Moving Coil and Magnetic Way meet the selection conditions.
• SGLGW-60A253CP Linear Servo Motor Moving Coil
• SGLGM-60  C Linear Servo Motor Magnetic Way
 Specifications of the Provisionally Selected Servo Motor
Item Code Value Item Code Value
Load Mass
m
W
1 kg Acceleration Time
t
a
0.02 s
Table Mass
m
T
2 kg Constant-speed Time
t
c
0.36 s
Motor Speed v 2 m/s Deceleration Time
t
d
0.02 s
Feeding Distance l 0.76 m Cycle Time t 0.5 s
Friction Coefficient

0.2 External Force on Linear Motion Section F 0 N
Item Value
Maximum Force 440 (N)
Rated Force 140 (N)
Moving Coil Mass ( m
M
)
0.82 (kg)
Servo Motor Magnetic Attraction ( F
att
) 0 (N)
Load
Table
Moving Coil
Magnetic Way
v
t
Motor speed (m/s)
Force (N)
Time (s)
ta
FP
FL
FS
tc td
v
ta
2
0.02
FP
= (
mW
+
mT
)
×
+
FL
= (1 + 2)
×
+ 5.88 = 305.88 (N)