41
Required Starting Torque
60
t
a
2
π
N
M
(
J
M
+
J
L
)
+
T
L
=
T
P
=
T
S
=
T
rms
=
T
P 2
t
a
+
T
L 2
t
c
+
T
S 2
t
d
=
t
<
1.91(N
m)
=
Instantaneous peak torque
Therefore, the servomotor can be used.
60
×
0.1
2
π
×
3000
×
(0.417 + 1.25)
×
10
-
4
60
×
0.1
2
π
×
3000
×
(0.417 + 1.25)
×
10
-
4
Required Braking Torque
Effective Torque
Therefore the recommended selection of servomotors and SERVOPACKs has sufficient capacity
and can be used.
—
T
L
=
<
1.91(N
m)
=
Instantaneous peak torque
Therefore, the servomotor can be used.
(0.662)
2
×
0.1+ (0.139)
2
×
0.9 + (
0.384
)
2
×
0.1
1.5
0.225(N
m)
<
0.637(N
m)
=
Rated torque
Therefore, the servomotor can be used.
<Ratings>
60
t
a
2
π
N
M
(
J
M
+
J
L
)
Selection of Servomotor Size
Load Acceleration Power
Recommended Servomotor Selections
Servomotor Check
Conditions
From these conditions, the following selections are recommended :
Servomotor : SJME-02AMA4
SERVOPACK : SJDE-02APA
+ 0.139 0.662(N
m)
—
0.139 0.384(N
m)
60
2
π
60
2
π
2
2
0.1
1.25
×
10
-4
= 123.4(W)
×
3000
×
=
N
M
P
a
=
J
L
t
a
P
a
+
P
o
=(1 to 2)
×
Motor rated output
T
L
Motor rated torque
N
M
Motor rated speed or maximum speed
J
L
Allowable load inertia of SERVOPACK
• Rated output
• Rated speed
• Maximum speed
• Rated torque
• Instantaneous peak torque
• Rotor moment of inertia
• Allowable load inertia of SERVOPACK
: 200(W)
: 3000(min
-1
)
: 4500(min
-1
)
: 0.637(N
m)
: 1.91(N
m)
: 0.417
×
10
-4
(kg
m
2
)
: 3
×
10
-4
(kg
m
2
)
