Section 1
General Information
A-2 Appendix A
MN718
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 to start braking
S
min
= Speed after braking
4.
Multiply Watts calculated in step 3 by 1.25 to allow for unanticipated loads
(safety factor).
Summary of Contents for 18H Series
Page 1: ...SERIES 18H AC Flux Vector Control Installation Operating Manual 9 97 MN718 VECTOR DRIVE ...
Page 105: ...Section 1 General Information 5 18 Troubleshooting MN718 ...
Page 109: ...Section 1 General Information 6 4 Manual Tuning the Series 18H Control MN718 ...
Page 144: ...Appendix C Appendix C 1 MN718 ...