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10. CHARACTERISTICS
10 - 6
(2) Dynamic brake time constant
The following shows necessary dynamic brake time constant τ for equation 10.2.
0
20
25
15
10
5
30
35
40
0 1000 2000 3000 4000 5000
73
13
43
23
Dynamic brake time
constant [ms]
Speed [r/min]
0
40
120
100
80
60
20
140
160
180
200
0 500 1000 1500 2000 2500 3000
102
52
202
302
152
Speed [r/min]
Dynamic brake time
constant [ms]
HG-KN series HG-SN series
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 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 servo motor.
Servo motor
Permissible load to motor inertia
ratio [multiplier]
HG-KN13_
HG-KN23_
HG-KN43_
HG-KN73_ 30
HG-SN52_
HG-SN102_
HG-SN152_
HG-SN202_ 24
HG-SN302_ 16