Rockwell Automation 1398-DDM-xxx ULTRA 100 Series Drives Installation Manual - Manual (Page 286)

Publication 1398-5.2 – PDF 1997
F-4 Dynamic Braking Resistor Selection
Average Power (Watts):
Intro
Intro
i t
( )
K
E
ω
o
e
t –
τ
----
⋅ ⋅
0.866 R 2 R
L
⋅
+
( )
------------------------------------------- = :
P( ) t
.
R
.
2 R L
e
0 0.05 0.1 0.15 0.2
0
2500
5000
7500
1 10
4
P( ) t
P t
( )
1.154 K
E
K
T
ω 2
o
⋅ ⋅ ⋅
R 2 + R
L
⋅ ( )
------------------------------------------------- e
2 – t ⋅
τ
------------
⋅
= :
Intro
P
ave
0.
·
144
K
E
K
T
ω 2
o
⋅ ⋅
R 2 R
L
⋅
+
------------------------------- =
P
ave
1116 =
: