An Improved Voltage-Mode Controller for the Quadratic Boost Converter

An improved voltage-mode controller (VMC) for the single-switch conventional quadratic boost converter (CQBC) is presented. It has a structure different from those of the existing voltage-mode controllers in that it avoids the possibility of dividing by zero and finding the square root of a term whi...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2022-02, Vol.69 (2), p.454-458
Main Author: Chan, Chok-You
Format: Article
Language:English
Subjects:
Circuits and systems
Controllers
Converters
Electric potential
Inductors
Output feedback control
quadratic boost converter
Regulation
Resistance
Stability analysis
Topology
Voltage
Voltage control
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Summary:An improved voltage-mode controller (VMC) for the single-switch conventional quadratic boost converter (CQBC) is presented. It has a structure different from those of the existing voltage-mode controllers in that it avoids the possibility of dividing by zero and finding the square root of a term which could be negative. It also now uses a proportional term with a normalized output voltage error as opposed to just using the normalized output voltage error in the integral term to provide integral action. Using these normalized signals helps to reduce the variations in the control signal, leading to improved performance. A comparative experimental study of the proposed VMC and the state-of-the-art modified current-mode controller is carried out under various operating conditions. The results are presented in the brief.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2021.3080289