— A-19 —
Appendix 6: Brake Built in YS Series Motor
1. Specifications
Table A-9
Motor type
Brake type
Staic friction torque (N·m)
Capacity (W)
Coil resistance (
Ω
)
YS2020
RNB2K
20
17
477
YS3040
RNB4K
40
23
352
YS4080
RNB8K
80
30
270
YS5120
RNB12K
120
33
245
Rated voltage
: DC90V
Insulation class
: B grade
Overexertion
: DC180V, 0.35 sec
Friction material : None-asbestos
l
The RNB brake comprises 12 parts as shown in Figures A-32 ~A-35.
l
The armature assembly (
3
) is fixed with bolts (
5
) and (
10
) through the plate spring (
4
) in the
field (
1
) incorporating the excitation coil.
l
The armature assembly is supported with the plate spring, and is separated from the field by a
narrow gap. Loaded with the coil spring (
2
) built in the field, the assembly presses the disk (
7
) to
apply brake.
l
When the coil is turned on, the field attracts the assembly against the coil spring pressure, thereby
removing the pressure on the disk and releasing the brake.
l
When the power supply is turned off, the coil spring force presses the armature assembly against
the disk, quickly applying the brake.
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