16. USING A DIRECT DRIVE MOTOR
16 - 19
(b) Dynamic brake time constant
The following shows necessary dynamic brake time constant
τ
for equation 16.1.
Time constant
[ms]
Speed [r/min]
0
0
100
200
5
15
20
25
30
300
400
500
006
004
10
002
0
0
100
200
70
300
400
500
012
006
018
10
20
30
40
50
60
Speed [r/min]
Time constant
[ms]
TM-RFM_C20 TM-RFM_E20
0
0
10
30
40
50
60
20
100
200
300
400
500
Speed [r/min]
072
048
012
Time constant
[ms]
0
0
60
50
100
150
200
70
80
50
40
30
20
10
Speed [r/min]
120
040
240
Time constant
[ms]
TM-RFM_G20 TM-RFM_J10
(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.
Direct drive motor
Permissible load to motor inertia ratio
[multiplier]
TM-RFM_C20
TM-RFM_E20
100 (300)
TM-RFM_G20 50
(300)
TM-RFM_J10 50
(200)
Summary of Contents for MR-J4-100A
Page 9: ...A 8 MEMO ...
Page 61: ...1 FUNCTIONS AND CONFIGURATION 1 44 MEMO ...
Page 67: ...2 INSTALLATION 2 6 MEMO ...
Page 137: ...3 SIGNALS AND WIRING 3 70 MEMO ...
Page 261: ...6 NORMAL GAIN ADJUSTMENT 6 24 MEMO ...
Page 291: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 30 MEMO ...
Page 299: ...8 TROUBLESHOOTING 8 8 MEMO ...
Page 319: ...9 OUTLINE DRAWINGS 9 20 MEMO ...
Page 461: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 36 MEMO ...
Page 511: ...14 COMMUNICATION FUNCTION 14 38 MEMO ...
Page 559: ...16 USING A DIRECT DRIVE MOTOR 16 20 MEMO ...
Page 583: ...17 FULLY CLOSED LOOP SYSTEM 17 24 MEMO ...
Page 621: ...APPENDIX App 38 ...
Page 639: ......