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MDS-D-SVJ3/SPJ3 Series Specifications Manual
4-1 Servomotor
(2) Magnetic brake characteristics
< HF Series >
< HF-KP Series >
(Note 1) There is no manual release mechanism. If handling is required such as during the machine core
alignment work, prepare a separate 24VDC power supply, and electrically release a brake.
(Note 2) These are the values added to the servomotor without a brake.
(Note 3) This is the representative value for the initial attraction gap at 20°C.
(Note 4) The brake gap will widen through brake lining wear caused by braking. However, the gap cannot be
adjusted. Thus, the brake life is considered to be reached when adjustments are required.
(Note 5) A leakage flux will be generated at the shaft end of the servomotor with a magnetic brake.
(Note 6) When operating in low speed regions, the sound of loose brake lining may be heard. However, this is
not a problem in terms of function.
Item
Motor type
HF75B, HF105B
HF54B, HF104B
HF154B,HF224B
HF123B, HF223B
HF142B
HF204B, HF354B
HF303B, HF302B
Type (Note 1)
Spring closed non-exciting operation magnetic brakes
(for maintenance and emergency braking)
Rated voltage 24VDC
Rated current at 20°C (A) 0.38 0.8 1.4
Capacity (W) 91934
Static friction torque (N•m) 2.4 8.3 43.1
Inertia (Note 2) (kg•cm
2
)
0.2 2.2 9.7
Release delay time (Note 3) (s) 0.03 0.04 0.1
Braking delay time (DC OFF) (Note 3) (s) 0.03 0.03 0.03
Tolerable braking work
amount
Per braking (J) 64 400 4,500
Per hour (J) 640 4,000 45,000
Brake play at motor axis (degree) 0.1 to 0.9 0.2 to 0.6 0.2 to 0.6
Brake life (Note 4)
No. of braking
operations (times)
20,000 20,000 20,000
Work amount
per braking (J)
32 200 1,000
Item
Motor type
HF-KP13B HF-KP23B, HF-KP43B HF-KP73B
Type (Note 1)
Spring closed non-exciting operation magnetic brakes
(for maintenance and emergency braking)
Rated voltage 24VDC
Rated current at 20°C(A) 0.26 0.33 0.42
Capacity (W) 6.3 7.9 10
Static friction torque (N•m) 0.32 1.3 2.4
Inertia (Note 2) (kg•cm
2
)
0.002 0.08 0.2
Release delay time (Note3) (s) 0.03 0.03 0.04
Braking delay time (DC OFF) (Note3) (s) 0.01 0.02 0.02
Tolerable braking
work amount
Per braking (J) 5.6 22 64
Per hour (J) 56 220 640
Brake play at motor axis (degree) 2.5 1.2 0.9
Brake life (Note4)
No. of braking
operations (times)
20,000 20,000 20,000
Work amount
per braking (J)
5.6 22 64