Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 134)

Application Data
Appendix D
D-7
Step 8 -- Determine if the Duty Cycle is within the Brake's Capability
DC = [ ] × 100
[ ]
DC = t
2
× 100
t
1
T
1
= The motor's cycle time
T
2
= The motor's decel time
DC = %
Find the intersection of
P
% and the motor’s decel time
DC in the chart
below. If the point of intersection is below the curve, the duty cycle is
within the brake’s limits. If the point is above the curve, the duty cycle is
beyond the brake’s limits but may be modified by increasing the motor’s
cycle time
t
1 .
0
30
10
20
5 15 25 30 40 50 10 20 35 45
5
15
25
55
35
45
40
50
80
60
70
65
75
90
85
95
P% 100
0
Duty Cycle DC in %