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Section 1
General Information
Dynamic Braking (DB) Hardware Continued
A-2 Appendix
General Machinery Load Calculations:
1.
Calculate braking duty cycle:
Duty Cycle +
2.
Calculate deceleration torque:
RPM change
+
T
Decel
308
where:
T
Decel
Wk
2
time = In seconds
3.
Calculate watts to be dissipated in dynamic braking resistor:
Watts + T
Decel
where:
S
= Speed at braking start
max
S
= Speed after braking
min
4.
Multiply watts calculated in step 3 by 1.25 to allow for unanticipated loads
(safety factor).
Braking Time
Total Cycle Time
Wk
2
* Friction
time
= Deceleration torque in Lb.-ft.
= Inertia in Lb.ft.
2
* S
( S
)
Duty Cycle
max
min
(Lb.Ft.)
( 0.0712 )
MN723
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Table of Contents
Troubleshooting
