Mitsubishi HG-RR User Manual
8. HG-JR SERIES
8 - 19
8.4 Electromagnetic brake characteristics
CAUTION
The electromagnetic brake is provided to prevent a drop at a power failure or
servo alarm occurrence during vertical drive or to hold a shaft at a stop. Do not
use it for normal braking (including braking at servo-lock).
Before operating the servo motor, be sure to confirm that the electromagnetic
brake operates properly.
The operation time of the electromagnetic brake differs depending on the power
supply circuit you use. Be sure to check the operation delay time with a real
machine.
servo alarm occurrence during vertical drive or to hold a shaft at a stop. Do not
use it for normal braking (including braking at servo-lock).
Before operating the servo motor, be sure to confirm that the electromagnetic
brake operates properly.
The operation time of the electromagnetic brake differs depending on the power
supply circuit you use. Be sure to check the operation delay time with a real
machine.
POINT
The 1500 r/min series servo motor of 22 kW or more and 1000 r/min series
servo motor of 15 kW or more with an electromagnetic brake are not available.
servo motor of 15 kW or more with an electromagnetic brake are not available.
The characteristics of the electromagnetic brake provided for the servo motor with an electromagnetic brake
are indicated below.
Servo motor
Item
HG-JR
series
53(4)B
73(4)B
73(4)B
103(4)B
153(4)B
203(4)B
153(4)B
203(4)B
353(4)B
503(4)B
503(4)B
703(4)B
903(4)B
903(4)B
601(4)B
801(4)B
801(4)B
12K1(4)B
701M(4)B
11K1M(4)B
15K1M(4)B
15K1M(4)B
Type (Note 1)
Spring actuated type safety brake
Rated voltage (Note 4)
24 V DC
0
-10%
Power consumption
[W] at 20 °C
11.7
23 34 32
Coil resistance (Note 6)
[Ω]
49 25
16.8 18.2
Inductance (Note 6)
[H]
0.37
0.25 1.10 0.73
Brake static friction torque
[N•m]
6.6 16
44 126
Release delay time (Note 2)
[s]
0.09
0.12 0.1 0.5
Braking delay time (Note 2) [s] DC off
0.03
0.03
0.03
0.2
Permissible braking work
Per braking
[J]
64
400
4500
5000
Per hour
[J]
640
4000
45000
45200
Brake looseness at servo motor shaft (Note 5)
[degrees]
0.01 to 0.8
0.01 to 0.6
0.2 to 0.6
0.01 to 0.6
Brake life (Note 3)
Number of brakings
[times]
5000 5000 20000
20000
Work per braking [J]
64
400
1000
400
Selection example of surge
absorbers to be used (Note 7)
absorbers to be used (Note 7)
For the suppressed
voltage 125 V
voltage 125 V
(Note 8) TND20V-680KB
For the suppressed
voltage 350 V
voltage 350 V
(Note 8) TND10V-221KB
Note 1. There is no manual release mechanism. When it is necessary to hand-turn the servo motor shaft for machine centering, etc.,
use a separate 24 V DC power supply to release the brake electrically.
2. The value for initial on gap at 20 °C.
3. The brake gap will increase as the brake lining wears, but the gap is not adjustable.
The brake life indicated is the number of braking cycles after which adjustment will be required.
4.
Always prepare a power supply exclusively used for the electromagnetic brake.
5. These are design values. These are not guaranteed values.
6. These are measured values. These are not guaranteed values.
7. Select the electromagnetic brake control relay properly, considering the characteristics of the electromagnetic brake and surge
absorber. When you use a diode for a surge absorber, the electromagnetic braking time will be longer.
8. Manufactured by Nippon Chemi-Con Corporation.