Quantitative Feedback Design-Based Robust PID Control of Voltage Mode Controlled DC-DC Boost Converter

This brief addresses the problem of instability occurring in the voltage control mode of a non-minimum phase (NMP) DC-DC boost converter. To solve this instability issue in the presence of uncertainties and the external disturbances, quantitative feedback theory (QFT) is adapted to systematically de...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2021-01, Vol.68 (1), p.286-290
Main Authors: Kobaku, Tarakanath, Jeyasenthil, R., Sahoo, Subham, Ramchand, Rijil, Dragicevic, Tomislav
Format: Article
Language:English
Subjects:
Control stability
Control systems
Controllers
Converters
DC-DC converter
disturbance dynamics
Disturbances
Electric potential
PID
Proportional integral derivative
Quantitative feedback theory
Robust control
Robustness
Sensors
Transfer functions
Tuning
Uncertainty
Voltage
Voltage control
Voltage converters (DC to DC)
voltage regulation
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Summary:This brief addresses the problem of instability occurring in the voltage control mode of a non-minimum phase (NMP) DC-DC boost converter. To solve this instability issue in the presence of uncertainties and the external disturbances, quantitative feedback theory (QFT) is adapted to systematically design a robust proportional integral derivative (PID) controller, which is realized using only sensed output voltage as feedback. The advantages of the proposed PID design using the QFT are: (i) it eliminates the burden of tedious and ad-hoc tuning of PID gains using the conventional PID design approaches, (ii) current measurement is not required, (iii) disturbance dynamics (input voltage and load current variations) are included in the design stage itself, which further enhances the disturbance rejection performance of the output voltage, and (iv) it allows direct design for the non-minimum phase boost converter despite the bandwidth limitations. Extensive simulations and experiments are carried out to validate the efficacy of the proposed PID controller in the presence of the external disturbances and compared its superiority over a conventional PID controller.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2020.2988319