YASKAWA JUNMA SERIES - Servomotor Selection Example; Verification and Recommendations

41
Required Starting Torque
60 t a
2π 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
2π × 3000 ×
(
0.417 + 1.25
)
× 10
- 4
60 × 0.1
2π × 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
2π 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
2π
60
2π
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
)