Mitsubishi HG-RR User Manual
6. HG-MR SERIES/HG-KR SERIES
6 - 6
6.4 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 performing the operation, 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 performing the operation, 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.
The characteristics of the electromagnetic brake provided for the servo motor with an electromagnetic brake
are indicated below.
Servo motor
Item
HG-MR Series/HG-KR Series
053B 13B 23B 43B 73B
Type (Note 1)
Spring actuated type safety brake
Rated voltage (Note 4)
24 V DC
0
-10%
Power consumption
[W] at 20 °C
6.3
7.9
10
Coil resistance (Note 6)
[Ω]
91.0 73.0
57.0
Inductance (Note 6)
[H]
0.15
0.18
0.13
Brake static friction torque
[N•m]
0.32
1.3
2.4
Release delay time (Note 2)
[s]
0.03
0.03
0.04
Braking delay time (Note 2) [s] DC off
0.01
0.02
0.02
Permissible braking work
Per braking
[J]
5.6
22
64
Per hour
[J]
56
220
640
Brake looseness at servo motor shaft (Note 5) [degrees]
2.5
1.2
0.9
Brake life (Note 3)
Number of brakings
[times]
20000
Work per braking
[J]
5.6
22
64
Selection example of surge absorbers
to be used
(Note 7, 8)
to be used
(Note 7, 8)
For the suppressed
voltage 125 V
voltage 125 V
TND20V-680KB
For the suppressed
voltage 350 V
voltage 350 V
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.