— 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 (
) is fixed with bolts (
) and (
) through the plate spring (
) in the
field (
) 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 (
) built in the field, the assembly presses the disk (
) 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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