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11. CHARACTERISTICS
11.3.2 The dynamic brake at the load inertia moment
Use the dynamic brake under the load inertia moment ratio indicated in the following table. If the load inertia
moment is higher than this value, the dynamic brake may burn. If there is a possibility that the load inertia
moment may exceed the value, contact your local sales office.
The values of the load inertia moment ratio in the table are the values at the maximum rotation speed of the
servo motor.
Servo amplifier
Servo motor
HF-
KP
HF-
MP
HF-
SP 1
HF-
SP 2
HC-
RP
HC-
UP
HC-
LP
HA-
LP 1
HA-
LP 1M
HA-
LP 2
HF-
JP
HF-
JP 1M
MR-J3-10A(1) 30 30
MR-J3-20A(1) 30 30
MR-J3-40A(1) 30 30
MR-J3-60A 30 30 30 30
MR-J3-70A 30 30 30
MR-J3-100A
30 30 30 30
MR-J3-200A 30 30 30 30 30 30
MR-J3-350A 16 16 16 16 16
16
(Note 3)
MR-J3-500A 15 15 15 15 15 15
15
(Note 3)
MR-J3-700A
5
(Note 1)
5
(Note 1)
5
(Note 1)
5
(Note 1)
MR-J3-11KA
(Note 2)
30 30 30
10
(Note 3)
MR-J3-15KA
(Note 2)
30 30 30
10
(Note 3)
MR-J3-22KA
(Note 2)
30 30 30
Servo amplifier
Servo motor
HF-SP 4
HA-
LP
14
HA-
LP 1M4
HA-
LP 24
HF-
JP 4
HF-
JP 1M4
MR-J3-60A4 5 (Note 1)
30
MR-J3-100A4 5 (Note 1) 30
MR-J3-200A4 5 (Note 1) 30
MR-J3-350A4 5 (Note 1) 30
MR-J3-500A4 5 (Note 1)
15
(Note 3)
MR-J3-700A4 5 (Note 1) 10 10
MR-J3-11KA4
(Note 2)
30 30 30
10
(Note 3)
MR-J3-15KA4
(Note 2)
30 30 30
10
(Note 3)
MR-J3-22KA4
(Note 2)
30 30 30
Note 1. The load inertia moment ratio is 15 at the rated rotation speed.
2. When the external dynamic brake is used.
3. The load inertia moment ratio is 30 at the rated rotation speed.