NDLI: Stability Optimization Method Based on Virtual Resistor and Nonunity Voltage Feedback Loop for Cascaded DC

Content Provider	IEEE Xplore Digital Library
Author	Wen Cai Fan Yi Cosoroaba, E. Fahimi, B.
Copyright Year	1972
Abstract	This paper proposes a stability optimization method based on virtual resistor and nonunity voltage feedback loop for cascaded dc-dc converters. Oscillating phenomenon or instability would occur occasionally with two or more closed-loop dc-dc converters in series. The virtual resistor and nonunity voltage feedback are used to modify the feedback loop instead of only a direct voltage feedback to improve stability and get rid of oscillating behavior. Based on the stability analysis of dc-dc converters with distributed parameters, several cases have been derived. After that, relative to different cases, two modified methods based on virtual resistor and nonunity voltage feedback loop are proposed to stabilize the overall system. With these methods, no extra power loss would be generated, and it is easy to embed them into any conventional control system. Experimental results verified the theoretical analysis and feasibility of the proposed control methods.
Sponsorship	IEEE Industry Applications Society
Starting Page	4575
Ending Page	4583
Page Count	9
File Size	1805650
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistors Stability analysis Inductors Capacitors DC-DC power converters Impedance Feedback loop virtual resistor Cascaded converter constant power load negative impedance non-unity feedback constant-power load (CPL) nonunity feedback
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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