
B-65302EN/01 SPECIFICATIONS FOR THE βiS SERIES 3.SELECTING A MOTOR
- 63 -
Coefficients for dynamic brake calculation
When an α
αα
αis/β
ββ
βis series servo amplifier (SVM) is used
SI unit
Gravitational system of
units
Model
ABAB
β0.2/5000iS
8.3 5.3×10
-7
8.1×10
-1
5.7×10
-8
β0.3/5000iS
3.4 4.6×10
-7
3.4×10
-1
4.5×10
-8
β0.4/5000iS
2.3 4.6×10
–7
2.3×10
-1
4.5×10
–8
β0.5/5000iS
9.0×10
-1
2.1×10
-7
8.8×10
-2
2.0×10
–8
β1/5000iS
3.8×10
-1
8.8×10
–8
3.7v10
-2
8.7×10
–9
β2/4000iS
2.1×10
-1
8.1×10
-8
2.1×10
-2
8.0×10
-9
β4/4000iS
8.7×10
-2
4.1×10
-8
8.5×10
-3
4.9×10
-9
β8/3000iS
3.9×10
-2
5.3×10
–8
3.8×10
-3
5.0×10
–9
β12/3000iS
1.0×10
-1
4.1×10
-9
1.0×10
-2
4.4×10
–10
β22/2000iS
4.0×10
-2
7.0×10
–9
3.9×10
-3
6.8×10
–10
The values of A and B are calculated by assuming that the resistance
of the power line is 0.05Ω per phase. The values will vary slightly
according to the resistance value of the power line.
The coefficient above values are applicable when the αi series servo
amplifier or βi series servo amplifier is being used. The coefficient
may change, depending on the type of the servo amplifier. Contact
FANUC when using the other amplifier.
When an β
ββ
βis series servo spindle amplifier (SVPM) is used
SI unit
Gravitational system of
units
Model
ABAB
β12/3000iS
1.9×10
-2
2.5×10
-8
1.9×10
-3
2.4×10
-9
β22/2000iS
7.8×10
-3
3.5×10
-8
7.6×10
-4
3.5×10
-9
The values of A and B are calculated by assuming that the resistance
of the power line is 0.05Ω per phase. The values will vary slightly
according to the resistance value of the power line.
The coefficient above values are applicable when the βi series servo
spindle amplifier is being used. The coefficient may change,
depending on the type of the servo amplifier. Contact FANUC when
using the other amplifier.