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Conducted Emission Reduction by Frequency Hopping Spread Spectrum Techniques

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Abstract

Spreading the switching frequency of a DC–DC converter is a cost effective method for reducing conducted emission. In this paper the main objective is to implement spread spectrum techniques in a digitally controlled DC–DC converter and to reduce conducted emission by modulation. To vary the switching frequency the spectrum can be spread across a band of frequencies and thus reducing the peak amplitude at individual frequencies. Here we introduce two methods Bifrequency technique and spread spectrum techniques. The effect of these techniques in ripple current and output ripple will be analyzed. The analysis is carried out on a digital DC–DC converter which has a PID based control device.

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Authors and Affiliations

  1. Department of IT, Karpagam College of Engineering, Coimbatore, India

    S. Smys

  2. ECE Department, Sarabhai Institute of Science and Technology, Thiruvananthapuram, India

    J. Thara Prakash

  3. Department of ECE, Karunya University, Coimbatore, India

    Jennifer S. Raj

Authors
  1. S. Smys
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  2. J. Thara Prakash
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  3. Jennifer S. Raj
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Correspondence to S. Smys.

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Smys, S., Thara Prakash, J. & Raj, J.S. Conducted Emission Reduction by Frequency Hopping Spread Spectrum Techniques. Natl. Acad. Sci. Lett. 38, 197–201 (2015). https://doi.org/10.1007/s40009-014-0324-6

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  • DOI: https://doi.org/10.1007/s40009-014-0324-6

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