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CONTROL ENGINEERING METHODS IN ANALYSIS AND DESIGN OF DC/DC CONVERTERS
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| Author(s) |
K. Zenger; I. Gadoura; T. Suntio |
| Abstract |
General control engineering methods are used to study
controller design and analysis methods of DC/DC
converters. The buck converter is studied as an example,
and special emphasis is given to nonidealities modelled by
equivalent series resistors (ESRs). In the case of a constant
power load the open loop system is shown to be stable even
with small resistor values of the ESRs; this result is
confirmed by simulations. Based on the small signal model
of the converter, a lead-lag compensator is designed by
using frequency domain techniques to meet the design
specifications. It is shown, how this compensator can with
high accuracy be approximated by a PID controller. The
operation of the system controlled by the PID controller is
then demonstrated by simulations of the closed loop
behaviour. The results show a much better performance
than those obtained by other tuning methods not
considering the ESRs. |
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| Filename: | Unnamed file |
| Filesize: | 402.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-20 by System |
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