Design and performance comparison of LQR Nonzero Set Point, Sliding Mode, and Current Mode digital controllers for Cuk converter

This paper performs the evaluation and comparison of performance after a load change of three control strategies-LQR Nonzero Set point (NZSP), Sliding Mode and Current Mode control for Cuk converter with non-idealities in components. The application consists of driving the contrast pins of an LCD based screens, requiring 50 Watts power delivered to the load. The Cuk converter with a variable input is employed to maintain the uniform output current and voltage through its operation of driving the contrast pins. State space averaging is used to model the system. All the controllers are implemented and compared against the settling time, efficiency to evaluate the best control strategy for the selected application.

[1]  C. Morel.  Slide mode control via current mode control in DC-DC converters , 2002, IEEE International Conference on Systems, Man and Cybernetics.

[2]  M. Ferdowsi,et al.  Controller design method for a cascaded converter system comprised of two DC-DC converters considering the effects of mutual interactions , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[3]  Malik Elbuluk,et al.  Fundamentals of Power Electronics , 2013 .

[4]  H. A. Toliyat,et al.  Flying-capacitor boost converter , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[5]  J. Mahdavi,et al.  Application of state space averaging method to sliding mode control of PWM DC/DC converters , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[6]  Bin Wang,et al.  Comparison Study of Switching DC-DC Converter Control Techniques , 2006, 2006 International Conference on Communications, Circuits and Systems.

[7]  W. Gu.  Small signal modeling for current mode controlled Cuk and SEPIC converters , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[8]  J. Lee,et al.  Review of current mode control schemes and introduction of a new digital current mode control method for the parallel module DC-DC converters , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[9]  C. Morel.  Application of slide mode control to a current-mode-controlled boost converter , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[10]  Ali Davoudi,et al.  Automated system identification and controller tuning for digitally controlled dc-dc converters , 2012 .

[11]  Mohammad Shadmand.  A Design-Oriented Framework to Determine the Parasitic Parameters of High Frequency Magnetics in Switching Power Supplies using Finite Element Analysis Techniques , 2012 .

[12]  Chi K. Tse,et al.  Instability and chaos in a current-mode controlled Cuk converter , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[13]  Yi Jia,et al.  Chaos in switch control of a current-mode Cuk converter , 2002, The 2nd International Workshop on Autonomous Decentralized System, 2002..

[14]  S. Chattopadhyay,et al.  A Digital Current-Mode Control Technique for DC–DC Converters , 2006, IEEE Transactions on Power Electronics.

[15]  S. Saggini,et al.  An innovative digital control architecture for low-Voltage, high-current DC-DC converters with tight voltage regulation , 2004, IEEE Transactions on Power Electronics.