Abstract：A new control technique for switching DC/DC converter, Multilevel-Pulse Adjustment (MPA), is proposed in this paper. Based on the output voltage error at the beginning of each switching cycle, MPA controller selects one control pulse among multilevel pulses as the control signal of converter at this switching cycle. The principle of the proposed control technique is analyzed and discussed. The operation states and small-signal model of MPA controlled Buck converter operating in discontinuous conduction mode are analyzed and studied. Analysis results show that MPA scheme is easy to realize, has great control robust, transient and steady state performance. The simulation as well as experimental results verifies the advantage of the proposed control techniques.
[1] Asumadu J A, Jagannathan V, et al. Synthesis of nonlinear control of switching topologies of buck- boost converter using fuzzy logic[C]. Proceedings of the 17th IEEE IMTC Conference, 2000: 169-173. [2] 吴磊涛, 杨兆华, 胥布工. DC/DC开关变换器的无源控制方法[J]. 电工技术学报, 2004, 19(4): 66-69. [3] 周宇飞, 丘水生, 伍言真. 开关变换器的时变滑模控制方法研究[J]. 电力电子技术, 2000(4): 22-25. [4] Smedley K M, Cuk S. One-cycle control of switching converters[J]. IEEE Transactions on Power Elec- tronics, 1996, 11(1): 99-105. [5] Sira-Ramirez H, Garcia-Esteban M, Zinober A S I. Dynamical adaptive pulse width modulation control of DC-DC power supplies[J]. International Journal of Control, 1996, 65(2): 205-222. [6] 李乔, 吴捷. 自抗扰控制及其在DC-DC变换器中的应用[J]. 电工技术学报, 2005, 20(1): 83-88. [7] 吴忠, 李红, 左鹏, 等. DC/DC升压变换器串级控制[J]. 中国电机工程学报, 2002, 22(1): 110-115. [8] 卢伟国, 周雒维, 罗全明, 等. 电压模式Buck变换器无源反馈混沌控制[J]. 电工技术学报, 2007, 22(11): 98-102. [9] Khaligh A, Emadi A. Pulse adjustment, a novel digital control technique, for control of a DC-DC Buck-Boost converter operating in discontinuous conduction mode and driving constant power loads[C]. IEEE Vehicle Power and Propulsion Conference 2006, 2006: 1-5. [10] Khaligh A, Rahimi A M, Emadi A. Negative impedance stabilizing pulse adjustment control technique for DC/DC converters operating in discontinuous conduction mode and driving constant power loads[J]. IEEE Transactions on Vehicular Technology, 2007, 56(4): 2005-2016. [11] Telefus M, Shteynberg A, Ferdowsi M, et al. Pulse train control technique for flyback converter[J]. IEEE Transactions on Power Electronics, 2004, 19(3): 757-764. [12] Ferdowsi M, Emadi A, Telefus M, et al. Suitability of pulse train control technique for BIFRED converter[J]. IEEE Transactions on Aerospace and Electronic Systems, 2005, 41(1): 181-189. [13] Khaligh A, Rahimi A M, Emadi A. Analysis and stabilization of a buck-boost DC-DC converter feeding constant power loads in parallel with conventional loads in vehicular systems[C]. IEEE IECON 32nd Conference, 2006: 2799-2804. [14] Ferdowsi M, Emadi A, Telefus M, et al. Pulse regulation control technique for flyback converter[J]. IEEE Transactions on Power Electronics, 2005, 20(4): 798-805. [15] Khaligh A, Emadi A. Power alignment, new digital control approach for a DC-DC flyback converter with constant power loads[C]. IEEE Industrial Electronics and Applications Conference, 2006: 1-6. [16] 张占松, 蔡宣三. 开关电源的原理与设计(修订版)[M]. 北京: 电子工业出版社, 2004.
2009, Vol. 24 
