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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.3
- 수록면
- 156 - 162 (7page)
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초록· 키워드
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The control loop time delay caused by sampling, the zero-order-holder effect and calculations is inevitable in the digital control of dc-dc switching converters. The time delay will limit the bandwidth of the control loop and therefore degrade the transient performance of digital systems. In this paper, the quantization time delay effects with different time delay values based on a generic second-order system are analyzed. The conclusion that the bandwidth of digital control is reduced by about 20% with a one cycle delay and by 50% with two cycles of delay in comparison with no time delay is obtained. To compensate the time delay and to increase the control loop bandwidth, a duty ratio predictive control scheme based on linear extrapolation is proposed. The compensation effect and a comparison of the load variation transient response characteristics with analogy control, conventional digital control and duty ratio predictive control with different time delay values are performed on a point-of-load Buck converter by simulations and experiments. It is shown that, using the proposed technique, the control loop bandwidth can be increased by 50% for a one cycle delay and 48.2% for two cycles of delay when compared to conventional digital control. Simulations and experimental results prove the validity of the conclusion of the quantization effects of the time delay and the proposed control scheme.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. QUANTIZATION EFFECTS OF TIME DELAY
Ⅲ. PROPOSED DUTY RATIO PREDICTIVE CONTROL SCHEME
Ⅳ. SIMULATION AND EXPERIMENTAL ANALYSIS
Ⅴ. CONCLUSIONS
REFERENCES
참고문헌 (21)
참고문헌 신청
D. Maksimovic / 2004 / Impact of digital control in power electronics / Proc. ISPSD :13~22
J. Q. Chen / 2003 / Predictive digital current programmed control / IEEE Trans. Power Eletron 18(1):411~419
L. Corradini / 2009 / Digital hysteretic voltage-mode control for DC-DC converters based on asynchronous sampling / IEEE Trans. Power Eletron 24(1):201~211
Hyun-Su Bae / 2007 / Digital State Feedback Current Control using the Pole Placement Technique / 전력전자학회 영문논문지 7(3):213~221
Y. F. Liu / 2009 / Recent developments in digital control strategies for DC/DC switching converters / IEEE Trans. Power Eletron 24(11):2567~2577
J. Q. Chen / 2003 / Predictive digital current programmed control / IEEE Trans. Power Eletron 18(1):411~419
L. Corradini / 2009 / Digital hysteretic voltage-mode control for DC-DC converters based on asynchronous sampling / IEEE Trans. Power Eletron 24(1):201~211
Hyun-Su Bae / 2007 / Digital State Feedback Current Control using the Pole Placement Technique / 전력전자학회 영문논문지 7(3):213~221
Y. F. Liu / 2009 / Recent developments in digital control strategies for DC/DC switching converters / IEEE Trans. Power Eletron 24(11):2567~2577
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UCI(KEPA) : I410-ECN-0101-2012-560-004202468