YASKAWA E-V-MD Series User Manual page 31

2 Selecting Products
2.2.2 Selection Calculations
(7) Servomotor Provisional Selection
 Selecting Conditions
T
L
P
o
n
M
J
L
The followings satisfy the conditions.
• Servomotor SGMJV-02A
 Specifications of the Provisionally Selected Servomotor
• Rated output: 200 (W)
• Rated motor speed: 3000 (min
• Rated torque: 0.637 (Nm)
• Instantaneous peak torque: 2.23 (Nm)
• Servomotor moment of inertia: 0.259 × 10
• Allowable load moment of inertia: 0.259 × 10
(8) Verification on the Provisionally Selected Servomotor
Check the following items to verify that the provisionally selected servomotor is suitable for the machine
specifications.
Required acceleration torque:
Required deceleration torque:
Torque effective value:
(9) Result
The provisionally selected servomotor is confirmed to be applicable.
The torque diagram is shown below.
2-6
Motor rated torque
+
P
Provisionally selected
a
<
servomotor rated output
2
Motor rated speed
Allowable load moment of inertia
-1
T
T
S
Trms
( N·m )
1 . 23
0 . 43
0
- 0 . 37
< +
P P
o a
)
-4 2
(kgm )
-4
× 15 = 3.885 × 10
2 π × 3000 × 0 . 259 + 2 . 29 × 10
2 π n
+
J J
M M L
= + =
T
P L
60 ta
1 . 23 N m <
Instantaneous peak torque...Satisfactory
2 π × 3000 × 0 . 259 + 2 . 29 × 10
2 π n
+
J J
M M L
= − =
T
L
60 td
0 . 37 N m <
Instantaneous peak torque...Satisfactory
+ +
T P 2 ta T L 2 tc Ts 2 td
=
t
0 . 483 N m <
Rated torque...Satisfactory
Torque
Speed
0 . 1 1 . 0 0 . 1
1 . 5
-4 2
(kgm )
-4
+ 0
60 × 0 . 1
-4
− 0
. 43
60 × 0 . 1
× 0
+ 0 × 1
1 . 23 . 1 . 43 . 0
2 2
=
1 . 5
. 43
+ 0 × 0
. 37 . 1
2