Mitsubishi Electric MELSERVO-J4 MR-J4 A Series Instruction Manual page 261

10. CHARACTERISTICS
(2) Dynamic brake time constant
The following shows necessary dynamic brake time constant for equation 10.2.
[ms]
[ms]
10.3.2 Permissible load to motor inertia when the dynamic brake is used
Use the dynamic brake under the load to motor inertia ratio indicated in the following table. If the load inertia
moment is higher than this value, the dynamic brake may burn. If the load to motor inertia ratio exceeds the
indicated value, contact your local sales office.
The values of the permissible load to motor inertia ratio in the table are the values at the maximum rotation
speed of the servo motor.
50
40
30
73
20
10
0
0 1000 2000 3000 4000 5000 6000
[r/min]
Speed [r/min]
HG-MR series
100
80
60
40
20
421
0
0 250 500 750 1000 1250 1500
Speed [r/min] [r/min]
HG-SR1000 r/min series
Servo
amplifier
MR-J4-10B
MR-J4-20B
MR-J4-40B
MR-J4-60B
MR-J4-70B
MR-J4-100B
MR-J4-200B
MR-J4-350B
MR-J4-500B
MR-J4-700B
Note. The permissible load to motor inertia ratio is 15 at the rated rotation speed.
50
40
30
43
20
[ms]
23
053
10
13
0
0
350
300
250
51 81
200
150
121
[ms]
201
100
50
301
0
0
Servo motor
HG-KR_ HG-MR_
HG-MR053: 35
30
HG-MR13: 32
30 32
30 32
30 32
10 - 6
73
1000 2000 3000 4000 5000 6000
[r/min]
Speed [r/min]
HG-KR series
52
152 502
202
500 1000 1500 2000 2500 3000
Speed [r/min]
[r/min]
HG-SR2000 r/min series
HG-SR_1 HG-SR_2
30 30
30 30
30 21
16 13 (Note)
15 13 (Note)
5 (Note)
43
23
053
13
102
352
702