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Average Current-Mode Control.pdf (718.08 KB)

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Average Current-Mode Control

Chadha, Ankit
http://rave.ohiolink.edu/etdc/view?acc_num=wright1453228923

Abstract Details

2015, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
In this thesis, an average current-mode controller is analyzed for controlling power electronic converters. This controller consists of two loops. An inner loop, which senses and controls the inductor current and an outer loop, which is used to control the output voltage and provide reference voltage for the inner current loop. An average current-mode controller averages out high frequency harmonics it senses from the inductor current to provide a smooth DC component. This can be used as a control voltage for a pulse width modulator and produce switching pulses for the power electronic converters. An average current-mode controller can also be designed for a good bandwidth, which helps in accurate tracking of the sensed inductor current. For a better understanding of the operation of an average current-mode controller analytical equations are derived. Many transfer functions, which help analyze the properties of an open loop system, the controller transfer functions and a block diagram representing the converter along with current and voltage-control loops are presented. The block diagram and the transfer functions were used to derive the required controller parameters on MATLAB. The designed converter along with the controller is implemented on SABER circuit simulator. Waveforms representing the analytical equations along with the dynamic properties of the converter with the controller were plotted. The plotted SABER simulations were in agreement with the analytical equations. The designed controller was able to produce a controlled output voltage for step change in input voltage and load resistance, when simulated on SABER. Ripples could be observed in the control voltage of the controller, when designed for a good bandwidth. This was also represented by the derived analytical equations.
Marian K. Kazimierczuk, Ph.D. (Advisor)
Yan Zhuang, Ph.D. (Committee Member)
Lavern Alan Starman, Ph.D. (Committee Member)
84 p.
Electrical Engineering
Average Current-Mode Control; Buck DC-DC Converter Control; Power electronic converter control; Controls; current-mode control; controller design; magnitude and phase plots; step responses;

Recommended Citations

Citations

  • Chadha, A. (2015). Average Current-Mode Control [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1453228923

    APA Style (7th edition)

  • Chadha, Ankit. Average Current-Mode Control. 2015. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1453228923.

    MLA Style (8th edition)

  • Chadha, Ankit. "Average Current-Mode Control." Master's thesis, Wright State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1453228923

    Chicago Manual of Style (17th edition)

wright1453228923
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© 2015, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.