Mitsubishi Electric MELSERVO HF-MP Instruction Manual page 352

13. HG-AK SERIES
13.3 Electromagnetic brake characteristics
CAUTION
The characteristics of the electromagnetic brake provided for the servo motor with an electromagnetic brake
are indicated below.
Item
Type (Note 1)
Rated voltage (Note 4)
Power consumption
Coil resistance (Note 6)
Inductance (Note 6)
Brake static friction torque
Release delay time (Note 2)
Braking delay
[s] DC off
time (Note 2)
Permissible braking Per braking
work
Per hour
Brake looseness at servo motor shaft (Note 5) [degrees]
Number of brakings
Brake life (Note 3)
Work per braking
Selection example of
For the suppressed voltage 125V
surge absorbers to
For the suppressed voltage 350V
be used (Note 7,8)
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 24VDC power supply to release the brake electrically.
2. The value for initial on gap at 20 .
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 initial values. These are not guaranteed values.
6. These values are measured values and not guaranteed values.
7. Select the electromagnetic brake control relay properly, considering the characteristics of the electromagnetic brake and
surge absorber.
8. Nippon Chemi-Con Corporation.
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 motor
[W] at20 (68 )
[ ] at20
[H]
[N m]
[oz in]
[s]
[J]
[J]
[times]
[J]
0136B
Spring-loaded safety brake
TND20V-680KB
TND10V-221KB
13 - 5
HG-AK series
0236B
0
24VDC
-10
1.8
320
1.6
0.095
13.5
0.03
0.01
4.6
46
0.1 to 2.5
20000
1
0336B