Harmonic Drive RSF supermini Series, Руководство пользователя

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Chapter 4 Motor shaft retention brake
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Chapter 4 Motor shaft retention brake(RSF-5B)
The RSF supermini series provides an actuator with a motor shaft retention brake as standard (Option
symbol: B), which can meet the fail-safe requirement without any additional brake.
The brake has 2 coils; one for releasing brake, and another for retaining the released state. By
controlling the currents through the coils, power consumption during retention of brake release can be
reduced.
4-1 Motor shaft retention brake specifications
Gear ratio
Item
30 50 100
Method
Single disc dry type deenergisation operation type
(Separate attraction coil and retention coil)
Brake operating voltage V 24VDC±10%
Current consumption during release
(at 20
°
C)
A 0.8
Current consumption during retention
of release (at 20
°
C)
A 0.05
Retention torque Note 1
N m 0.18 0.29 0.44
kgf cm 1.84 2.96 4.49
Moment of inertia Note 1
(GD
2
/4)
kg cm
2
0.111
!
10
-3
0.309
!
10
-3
1.234
!
10
-3
(J)
kgf cm s
2
1.132
!
10
-3
3.151
!
10
-3
12.58
!
10
-3
Weight Note 2 g 86.0
Number of allowable brake
operations
Note 3 100,000 times
Note 1: This is a value at the output shaft of the actuator.
Note 2: This is a value for the entire actuator.
Note 3: The motor shaft rotation speed is controlled as shown in the following table.
Gear ratio
Output shaft rotation speed
[r/min]
Motor shaft rotation speed
[r/min]
1:30 5.0
150 1:50 3.0
1:100 1.5
4-2 Controlling the brake power supply
4-2-1 Using a relay cable (Recommended method)
The optional relay cables for brakes (EWA-B
!!
-JST03-TMC) incorporate a circuit that controls the
brake current.
You don’t have to control the brake current, so it is recommended to use the actuator with a brake in
combination with a relay cable for brakes.
If the relay cable for brakes is used, brake can be operated by turning on/off the brake power supply.
The power supply for the brake (that can output 24VDC±10%) shall be provided by the customer. Use
a power supply unit that can output the current during release as described in “4-1 Motor shaft retention
brake specifications.”
The supply duration of the current consumption during release is 0.5sec or less at 24VDC
±
10%.