Browse > Article
http://dx.doi.org/10.6113/JPE.2012.12.1.98

Modified Digital Pulse Width Modulator for Power Converters with a Reduced Modulation Delay  

Qahouq, Jaber Abu (Dept. of Electrical and Computer Eng., The University of Alabama)
Arikatla, Varaprasad (Dept. of Electrical and Computer Eng., The University of Alabama)
Arunachalam, Thanukamalam (Dept. of Electrical and Computer Eng., The University of Alabama)
Publication Information
Journal of Power Electronics / v.12, no.1, 2012 , pp. 98-103 More about this Journal
Abstract
This paper presents a digital pulse width modulator (DPWM) with a reduced digital modulation delay (a transport delay of the modulator) during the transient response of power converters. During the transient response operation of a power converter, as a result of dynamic variations such as load step-up or step-down, the closed loop controller will continuously adjust the duty cycle in order to regulate the output voltage. The larger the modulation delays, the larger the undesired output voltage deviation from the reference point. The three conventional DPWM techniques exhibit significant leading-edge and/or trailing-edge modulation delays. The DPWM technique proposed in this paper, which results in modulation delay reductions, is discussed, experimentally tested and compared with conventional modulation techniques.
Keywords
Counter; Delay; Digital Control; Digital Pulse Width Modulation; Power Control; Power Converter; Transient Response;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
연도 인용수 순위
1 P.-L. Wong and F. C. Lee, "Switching action delays in voltage regulator modules," in IEEE Power Electronics Specialists Conference, Vol. 2, pp. 675-678, 2002.
2 D. S. Sha, Z. Q. Guo, and X. Z. Liao, "Digital control strategy for input-series-output-parallel modular dc/dc converters," Journal of Power Electronics, Vol. 10, No. 3, pp. 245-250, May 2010.   DOI   ScienceOn
3 A. V. Peterchev, Jinwen Xiao, and S. R. Sanders, "Architecture and ic implementation of a digital vrm controller," IEEE Trans. Power Electron., Vol. 18, No. 1, pp. 356-364, Jan. 2003.   DOI   ScienceOn
4 L. Peng, Y. Kang, X. Pei, and J. Chen, "A novel PWM technique in digital control," IEEE Trans. Ind. Electron., Vol. 54, No. 1, pp. 338-346, Jan. 2007.   DOI   ScienceOn
5 Y. F. Chan, M. Moallem, and W. Wang, "Design and implementation of modular fpga-based pid controllers," IEEE Trans. Ind. Electron., Vol. 54, No. 4, pp. 1898-1906, Apr. 2007.   DOI   ScienceOn
6 A. V. Peterchev, and S. R. Sanders, "Quantization resolution and limit cycling in digitally controlled PWM converters," IEEE Trans. Power Electron., Vol. 18. No. 1, pp. 301-308, Jan. 2003.   DOI   ScienceOn
7 L. Guo, J. Y. Hung, and R. M. Nelms, "Evaluation of dsp-based pid and fuzzy controllers for dc-dc converters," IEEE Trans. Ind. Electron., Vol. 56 , No. 6, pp. 2237-2248, Jun. 2009.   DOI   ScienceOn
8 J. A. A. Qahouq, and V. Arikatla, "Power converter with digital sensorless adaptive voltage positioning control scheme," IEEE Trans. Ind. Electron., Vol. 58, No. 9, pp. 4105-4116, Sep. 2011.   DOI   ScienceOn
9 B. Miao, R. Zane, and D. Maksimovic, "Automated digital controller design for switching converters," in 36th IEEE Power Electronics Specialists Conference, PESC '05, pp. 2729-2735, 2005.
10 Z. Jianlong, M. Xikui, and D. Changqing, "Asymmetrical oscillations in digitally controlled power-factor-correction boost converters," IEEE Trans. Circuits and Syst. II, Vol. 56, No. 3, pp. 230-234, Mar. 2009   DOI   ScienceOn
11 V. Yousefzadeh, T. Takayama, and D. Maksimovi, "Hybrid dpwm with digital delay-locked loop," in IEEE Workshop on Computers in Power Electronics, COMPEL '06, pp. 142-148, 2006.
12 W. Qiu, G. Miller, and Z. Liang, "Dual-edge pulse width modulation scheme for fast transient response of multiple-phase voltage regulators," in IEEE Power Electronics Specialists Conference, pp. 1563-1569, 2007.
13 M. He, and J. Xu, "Nonlinear pid in digital controlled buck converters," in IEEE Applied Power Electronics Conference, Vol. 2, pp. 1461-1465, 2007.
14 A. Syed, E. Ahmed, D. Maksimovic, and E. Alarcon, "Digital pulse width modulator architectures,"in IEEE 35th Annual Power Electronics Specialists Conference, PESC 04, Vol. 6, pp. 4689- 4695, 2004.
15 P. J. Sun and L. W. Zhou, "Duty ratio predictive control scheme for digital control of dc-dc switching converters," Journal of Power Electronics, Vol. 11, No. 2, pp. 156-162, Mar. 2011.   DOI   ScienceOn
16 J. H. Kim, J. G Lim, and S. K. Chung, Y. J. Song, "Dsp-based digital controller for multi-phase synchronous buck converters," Journal of Power Electronics, Vol. 9, No. 3, pp. 410-417, May 2009.
17 A. Prodic, D. Maksimovic, and R. W. Erickson, "Design and implementation of a digital PWM controller for a high-frequency switching DC-DC power converter," in The 27th Annual Conference of the IEEE Industrial Electronics Society, IECON '01, Vol. 2, pp. 893-898, 2001.
18 V. Yousefzadeh, and D. Maksimovic, "Sensorless optimization of dead times in DC-DC converters with synchronous rectifiers," IEEE Trans. Power Electron., Vol. 21, No. 4, pp. 994-1002, Jul. 2006.   DOI   ScienceOn
19 L. Corradini, P. Mattavelli, E. Tedeschi, and D. Trevisan, "Highbandwidth multisampled digitally controlled DC-DC converters using ripple compensation," IEEE Trans. Ind. Electron., Vol. 55, No. 4, pp. 1501-1508, Mar. 2008.   DOI   ScienceOn
20 C. Sudhakarababu and M. Veerachary, "Dsp based control of interleaved boost converter," Journal of Power Electronics, Vol. 5, No. 3, pp. 180-189, Jul. 2005.
21 T. Nussbaumer, M. L. Heldwein, G. Gong, S. D. Round, and J. W. Kolar, "Comparison of prediction techniques to compensate time delays caused by digital control of a three-phase buck-type PWM rectifier system," IEEE Trans. Ind. Electron., Vol. 55, No. 2, pp. 791-799, Feb. 2008.   DOI   ScienceOn