Rockwell Automation 2364F Regenerative DC Bus Supply Unit (RGU) - Manual (Page 94)

Publication 2364F-5.01– October 2003
9-2 Adjusting Voltage and Current Regulation Parameters
Voltage Loop Regulation
The voltage loop, which resides in the host processor on the main
control board, performs the initial control calculations. Functionally,
the voltage loop can be considered to be "roughly tuning" the RGU
control. Voltage loop performance is adjusted via user-configured
parameters.
Voltage loop tasks include (Step numbers below correspond to the
functional boxes shown in Figure 9.2):
1. Identifying the DC bus reference
2. Monitoring the DC bus feedback
3. Comparing the DC bus reference with the DC bus feedback
4. Processing bus data and making necessary error corrections in the
PI regulator
5. Generating a voltage loop I
q
command
6. Generating a voltage loop I
d
command
Figure 9.2
Voltage Loop Regulation Block Diagram
DC Bus
Reference
DC Bus
Feedback
Reference to
Feedback
Comparator
PI Regulator
I
q
Current
Limiting
I
d
Current
Limiting
1
2
3
4
5
6