GE Industrial Solutions AF-650 GP General Purpose Drive - Manual (Page 13)

The relation between braking power and acceleration/braking of a conveyor belt.
5.1.2 Example 2 - Centrifuge
Another typical application in which braking can be required on centrifuges. The weight of the centrifuge content is m.
j
C
= centrifuge inertia = ½ x m x (r
1
2 + r
2
2 ) [kgm 2 ]
j
M
= Gear motor inertia [kgm 2 ]
η
M
= Gear motor efficiency
n
1
= max. motor speed [rpm]
n
2
= max. centrifuge speed [rpm]
Eb =
(
0.0055 × jc × n2
2 + 0.0055 × jM × n12
)
× ηM Ws
AF-650 GP Brake Resistor Design Guide
12
5