Rockwell Automation 2364P Parallel DC Bus Supply Config. - Manual (Page 21)

Publication 2364P-5.01 December 1999
Theory of Operation 1-9
The diagram below shows the NRU//RGU regenerative bus voltage.
The RGUs regenerate up to 100% of their rated current to the AC line
while the NRU diode bridge stops conducting.
Figure 1.14
NRU//RGU Bus Voltage–Regenerating
When the RGUs are not enabled, only the NRU supplies current to
the DC bus. The bus voltage is 1.35 times the line voltage at no load,
and decreases to 1.22 times the line voltage at full load. During this
operation, the RGUs do not regulate the voltage or regenerate any
current.
Figure 1.15
NRU//RGU Bus Voltage–RGUs Not Enabled
% Load
DC
B
u
s V
o
lt
ag
e
10 0% 0 %
0 V D C
1.5 2 x V A C
% Load
DC
B
u
s V
o
lt
ag
e
1 00 % 0 %
0 V D C
1.3 5 x V A C
1.2 2 x V A C