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3. Characteristics
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3-2-3 Dynamic brake characteristics
If a servo alarm that cannot control the motor occurs, the dynamic brakes will function to stop the
servomotor regardless of the parameter settings.
(1) Deceleration torque
The dynamic brake uses the motor as a generator, and obtains the deceleration torque by
consuming that energy with the dynamic brake resistance. The characteristics of this deceleration
torque have a maximum deceleration torque (Tdp) regarding the motor speed as shown in the
following drawing. The torque for each motor is shown in the following table.
Deceleration torque characteristics of a dynamic brake
Max. deceleration torque of a dynamic brake
Motor
type
Combination unit
Stall torque
(N・m)
Ndp
(r/min)
Tdp
(N・m)
MDS-R-V1-20
HF75
MDS-R-V2-2020/4020
2 1254 5.43
MDS-R-V1-20
HF105
MDS-R-V2-2020/4020
3 1254 5.43
MDS-R-V1-20
HF54
MDS-R-V2-2020/4020
2.94 478 3.96
MDS-R-V1-40
MDS-R-V2-4020/4040
5.88 409 10.04
HF104
MDS-R-V2-6040/8040 5.88 539 10.04
MDS-R-V1-60
HF154
MDS-R-V2-6040/6060/8060
8.82 541 15.62
MDS-R-V1-60
HF224
MDS-R-V2-6040/6060
12 660 21.77
MDS-R-V1-60
HF204
MDS-R-V2-6040/6060/8060
13.7 367 15.94
MDS-R-V1-80
HF354
MDS-R-V2-8040/8060/8080
22.5 464 35.24
MDS-R-V1-20
HF123
MDS-R-V2-2020/4020
7 370 9.74
MDS-R-V1-40
MDS-R-V2-4020/4040
12 339 21.56
HF223
MDS-R-V2-6040/8040 12 500 21.56
MDS-R-V1-60
HF303
MDS-R-V2-6040/6060/8060
22.5 357 35.33
MDS-R-V1-20
HF142
MDS-R-V2-2020/4020
11 330 15.46
MDS-R-V1-40
MDS-R-V2-4020/4040
20 190 35.45
HF302
MDS-R-V2-6040/8040 20 305 35.45
Tdp
Ndp
Deceleration
torque
0
Motor speed