18 Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017
Chapter 2 Determining Dynamic Brake Requirements
minimum dynamic brake resistance table in Appendix A. This will give a data
point for a line to be drawn on one the curves provided in
Chapter 3.
Step 5 – Percent Peak Load of the Internal Dynamic Brake Resistor
Skip this calculation if an external dynamic brake resistor will be used.
PL = Peak load in percent of dynamic brake resistor
P
av
= Peak braking power calculated in Step 2 – Peak Braking Power
on page 15 (watts)
P
db
= Steady state power dissipation capacity of dynamic brake
resistors obtained from
Appendix A (watts)
Calculate Percent Peak Load of the dynamic brake resistor:
Record Percent Average Load of the dynamic brake resistor:
The calculation of
PL in percent gives the percentage of the instantaneous power
dissipated by the Dynamic Brake Resistors relative to the steady state power
dissipation capacity of the resistors. This will give a data point to be drawn on one
of the curves provided in
Chapter 3.
PL=
PL
P
b
P
db
--------- 100=
PL
oooooooooo
oooooooooo
------------------------------------- - 100=
To Next Page
Loading...
Need help?
General
