Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 396

14. USING A DIRECT DRIVE MOTOR
(b) Dynamic brake time constant
The following shows necessary dynamic brake time constant τ for equation 14.1.
(2) Permissible load to motor inertia ratio when the dynamic brake is used
Use the dynamic brake under the load to motor inertia ratio indicated in the following table. If the ratio is
higher than this value, the built-in dynamic brake may burn. If there is a possibility that the ratio may exceed
the 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 direct drive motor.
The value in the parenthesis shows the value at the rated speed of the direct drive motor.
Direct drive motor
TM-RFM002C20
TM-RFM004C20
TM-RFM006C20
TM-RFM006E20
TM-RFM012E20
TM-RFM018E20
TM-RFM012G20
TM-RFM040J10
30
25
002
004
20
15
10 006
5
0
0 100 200 300
Speed [r/min]
TM-RFM C20
60
50
012
40
30
20
10
0
0 100 200 300
Speed [r/min]
TM-RFM G20
MR-J3W-22B
A-axis B-axis
100 (300)
70
60
50
40
30
20
10
400 500
80
70
60
50
40
30
20
10
400 500
Servo amplifier
MR-J3W-44B
A-axis B-axis
100 (300)
100 (300)
14 - 63
018
006
012
0
0 100 200 300
Speed [r/min]
TM-RFM E20
040
0
0
50 100
Speed [r/min]
TM-RFM J10
MR-J3W-77B MR-J3W-1010B
A-axis B-axis A-axis
100 (300)
100 (300)
100 (300)
100 (300)
50 (300)
50 (200)
400 500
150 200
B-axis
100 (300)
100 (300)
100 (300)
100 (300)
100 (300)
50 (300)
50 (200)