An Analytical Investigation of DC/DC Power Electronic Converters With Constant Power Loads in Vehicular Power Systems

Stability of multi-converter power systems, which exist in advanced more electric vehicles, is of great importance. The stability issue is investigated in this paper, and design considerations and limitations of the methods that stabilize the open-loop converters are presented. By stabilizing the op...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2009-07, Vol.58 (6), p.2689-2702
Main Authors: Rahimi, A.M., Emadi, A.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Constant power loads (CPLs)
continuous-conduction mode (CCM)
Converters
Damping
damping methods
DC-DC power converters
DC/DC converters
Design engineering
Direct current
Electric power generation
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical power engineering
Electronic circuits
Electronics
Exact sciences and technology
feedback
Feedback loop
Feeders
Ground, air and sea transportation, marine construction
Hybrid electric vehicles
Hybrid power systems
Inverters
loop gain and bandwidth
Mathematical models
Miscellaneous
multi-converter power systems
Power electronics
Power electronics, power supplies
Power networks and lines
Power system analysis computing
Power system stability
Road transportation and traffic
Signal convertors
Stability
vehicular power systems
Voltage
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Description
Summary:Stability of multi-converter power systems, which exist in advanced more electric vehicles, is of great importance. The stability issue is investigated in this paper, and design considerations and limitations of the methods that stabilize the open-loop converters are presented. By stabilizing the open-loop converter, it is shown that the feedback loop design is usually translated into a conventional feedback design task. The behavior of the unstable converter is also discussed, and a method for decreasing the amplitude of the output voltage oscillations is proposed. The model of a tightly regulated practical converter is presented. This model is used to decide how much damping should be added to make the feeder converter stable. Furthermore, because we have this information about the load converter, the feeder converter can be redesigned so that it does not see the load converter as a constant power load.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.2010516