Mitsubishi MR-J4-10A Instruction Manual page 558

16. USING A DIRECT DRIVE MOTOR
(b) Dynamic brake time constant
The following shows necessary dynamic brake time constant τ for equation 16.1.
(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 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.
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
048
20
10
072
0
0 100 200 300
Speed [r/min]
TM-RFM_G20
Direct drive motor
TM-RFM_C20
TM-RFM_E20
TM-RFM_G20
TM-RFM_J10
70
60
50
40
30
20
10
0
400 500 0
80
70
60
50
40
30
20
10
0
0
400 500
Permissible load to motor inertia ratio
[multiplier]
100 (300)
16 - 19
018
006
012
100 200 300 400
Speed [r/min]
TM-RFM_E20
040
240
120
50 100 150
Speed [r/min]
TM-RFM_J10
50 (300)
50 (200)
500
200