Analyzing voltage ripple in variable-frequency DC/DC boost converter

Numerous variable-frequency (VF) EMI-reduction schemes have been proposed over the last decades. The aim of these VF or spread-spectrum techniques is to reduce both the measurable and effective undesirable electromagnetic noise of a switch mode power supply. Conducted RF-interference measurements have been reported in literature. However, low frequency output voltage ripple has been considered as a major problem in VF DC/DC converters and the majority of these papers do not consider this aspect of VF operation. Analysis of the output voltage ripple with four different VF techniques in six different configurations is made in this paper, and prototype measurements with a boost converter are presented.

[1]  M. Zigliotto,et al.  Effective random space vector modulation for EMI reduction in low-cost PWM inverters , 1998 .

[2]  Shu Yuen Ron Hui,et al.  A comparison of nondeterministic and deterministic switching methods for DC-DC power converters , 1998 .

[3]  Dan Y. Chen,et al.  Reduction of power supply EMI emission by switching frequency modulation , 1993 .

[4]  George C. Verghese,et al.  Nonlinear Phenomena in Power Electronics , 2001 .

[5]  T. Tanaka,et al.  Random-switching control in DC-to-DC converters: an implementation using M-sequence , 1997, Proceedings of Power and Energy Systems in Converging Markets.

[6]  Mikko Kuisma,et al.  Minimizing conducted RF-emissions in switch mode power supplies using spread-spectrum techniques , 2004 .

[7]  Kwang-Woon Lee,et al.  Suppression of harmonic spikes in switching converter output using dithered sigma-delta modulation , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[8]  Miro Milanovic,et al.  EMI reduction in randomized boost rectifier , 1999, ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465).

[9]  D. Howe,et al.  Easing EMC problems in switched mode power converters by random modulation of the PWM carrier frequency , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[10]  George C. Verghese,et al.  Analysis and synthesis of randomized modulation schemes for power converters , 1993 .

[11]  Hing Cheung So,et al.  A comparative study of using random switching schemes for DC/DC converters , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[12]  Milan M. Jovanovic,et al.  Present and future of distributed power systems , 1992, [Proceedings] APEC '92 Seventh Annual Applied Power Electronics Conference and Exposition.

[13]  K. K. Tse,et al.  Effects of continuous noise in randomised switching DC-DC converters , 1997 .

[14]  D. Howe,et al.  Random carrier frequency modulation of PWM waveforms to ease EMC problems in switched mode power supplies , 1995, Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95.