Wide Input and Load Integral Gain Changeable Digital Control DC-DC Converter

Abstract

The aim of this paper is to present an integral gain changeable digital control dc-dc converter with wide input and load regulation characteristics. Since the green energy depends on the environment, wide input regulation characteristics are necessary in dc-dc converters. Additionally, dc-dc converters have an issue that the output voltage of dc-dc converters is increased in the light load condition. When the large feedback gain is used to realize wide regulation characteristics, the stability becomes worse. The proposed method can address all of them using a simple integral gain changeable method. The integral gain is changed quickly by the load current value. The integral changeable function uses a single approximate function which is designed by the stabilization range of output voltage based on the integral control. The proposed method has great regulation characteristics against both of the input voltage and load. Furthermore, it has a superior transient response to the conventional integral gain fixed method. Simulated and experimental results are provided to confirm the effectivity of proposed method.

Keywords

• dc-dc converter; digital control; integral gain; wide regulation; transient response

Kaynakça

1. H. H. Abdeltawab and Y. A. R. I. Mohamed, “Market- oriented energy management of a hybrid wind-battery energy storage system via model predictive control with constraint optimizer,” IEEE Trans. on Industrial Electronics, vol. 62, no. 11, pp. 6658–6670, Nov. 2015.
2. D. B. W. Abeywardana, B. Hredzak, and V. G. Agelidis,
3. grid-connected “Single-phase
4. supercapacitor hybrid energy storage system with
5. interleaved boost inverter,” IEEE Trans. on Power
6. Electronics, vol. 30, no. 10, pp. 5591–5604, Oct. 2015.
7. Y. Kang, C. Chiu, M. Lin, C. Yeh, J. Lin,and K. Chen, “Quasiresonant control with a dynamic frequency selector and constant current startup technique for 92% peak efficiency and 85% light-load efficiency flyback converter,” IEEE Trans. on Power Electronics, vol. 29, no. 9, pp. 4959-4969, Sept. 2014.
8. S. A. Khajehoddin, M. Kaeimi-Ghartemani, P. K. Jain, and A. Bakhshai, “DC-bus design and control for a single-phase grid-connected renewable converter with a small energy storage componet,” IEEE Trans. on Power Electronics, vol. 28, no. 7, pp. 3245-3254, Oct. 2012.

9. M. Vulovic, D. Boroyevich and P. Mattavelli, “Digital gain-scheduled control of a high frequency parallel resontant dc-dc converter,” in Proc. IEEE Applied Power Electronics Conference and Exposition, Feb. 2012, pp.1814-1820.
10. S. Chae, Y. Song, S. Park and H. Chung “Digital current sharing method for mulitiphase dc-dc converters using the peak input voltage,” in Proc. IEEE Energy Conversion Congress and Exposition, pp.1307-1311, Sept. 2011.
11. L. Corradini and P. Mattavelli “Modeling of multisampled pukse width modulators for digitally controlled dc-dc converters,” IEEE Trans. on Power Electronics, vol. 23, no. 4, pp. 1839-1847, July 2008.
12. J. Lee, J. Shin and B. H. Cho “A digital predictive critical conduction mode buck converter control method,” in Proc. IEEE Applied Power Electronics Conference and Exposition, Feb. 2012, pp.709-714.
13. Z. Zhao and A. Prodic, “Limit-cycle oscillations based auto-tuning system for digitally controlled dc-dc power supplies,” IEEE Trans. on Power Electronics, vol. 22, no. 6, pp. 2211-2222, Nov. 2007.
14. S. Lim, J. Ranson, D. M. Otten, and D. J. Perreault, “Two-stage power conversion architecture suitable for wide range input voltage,” IEEE Trans. on Power Electronics, vol. 30, no. 2, pp. 805–816, Feb. 2015.
15. R. Guo, Z. Liang, and A. Q. Huang, “A family of multimodes charge pump based dc–dc converter with high efficiency over wide input and output range,” IEEE Trans. on Power Electronics, vol. 27, no. 11, pp. 4788–4798, 2012.
16. K. A. Cho, S. H. Ahn, S.B. Ok, H. J. Ryoo, S. R. Jang and G. H. Rim “Design of LCC resonant converter for renewable energy systems with wide-range input voltage,” in Proc. IEEE Power Electronics and Motion Control Conference, Jun. 2012, pp. 1221-1228.
17. Hao Cheng, K. M. Smedley, and A. Abramovitz, “A wide-input-wide-output (WIWO) dc-dc converter,” IEEE Trans. on Power Electronics, vol. 25, no. 2, pp. 280–289, Feb. 2010.
18. O. Trescases and W. Yue, “A survey of light-load efficiency improvement techniques for low-power dc- dc converters,” in Proc. IEEE Power Electronics and Asia (ICPE& ECCE), May 2011, pp.326-333.
19. T. Ueno, T. Miyazaki, T, Ogawa and T. Itakura, “A 600 mA, constant on-time controlled DC-DC converter with 67% conversion efficiency at an output current of 23 µA,” in Proc. IEEE Applied Power Electronics Conference and Exposition, Mar. 2014, pp.1932-1935.
20. F. Kurokawa and S. Higuchi, “Control characteristics of dc-dc converter using digital integral gain switchover function,” in Proc. IEEE International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Jun. 2012, pp. 1320-1323.
21. H. Matsuo, F. Kurokawa, K. Imamura, K. Imamura and K. Tanaka, “Regulation characteristics of the DC-DC converter with digital current-injected control circuit,” in Proc. IEEE International Telecommunications Energy Conference, Sept. 1992, pp. 455-462.