Baldor 15H 用户手册
Section 1
General Information
General Information
A-2 Appendix
MN715
Dynamic Braking (DB) Hardware Continued
General Machinery Load Calculations:
1.
Calculate braking duty cycle:
Duty Cycle
+
Braking Time
Total Cycle Time
2.
Calculate deceleration torque:
T
Decel
+
RPM change
Wk
2
308
time
*
Friction
(Lb.Ft.)
where:
T
Decel
= Deceleration torque in Lb.-ft.
Wk
2
= Inertia in Lb.ft.
2
time = In seconds
3.
Calculate watts to be dissipated in dynamic braking resistor:
Watts
+
T
Decel
(S
max
*
S
min
)
Duty Cycle
(0.0712)
where:
S
max
= Speed at braking start
S
min
= Speed after braking
4.
Multiply watts calculated in step 3 by 1.25 to allow for unanticipated loads
(safety factor).
(safety factor).