Abstract
This paper gives a review on the methodologies of using the continuous power spectrum feature of chaos to suppress electromagnetic interference (EMI), which have been extensively studied in the past 15 years, and their practical applications in power electronic converters of various topologies and powers, which have been widely employed in various electrical and electronic devices in our daily lives and thus form the main sources of EMI. This paper not only points out that chaotic modulation is effective and feasible in improving the electromagnetic compatibility (EMC) of various types of power electronic converters, but also gives the circuit design methodologies for different kinds of converters, especially the design methods of modules and chips. It can serve as a guide for engineering applications.
Highlights
Together with relativity and quantum mechanics, chaos is well considered as one of the three monumental scientific discoveries of the 20th century, which has been developed since the 1960s [Sharkovskii, 1964], and established in the 1970s [Li & Yorke, 1975]
The pulse-width modulation (PWM) module of the converter is injected by the external chaotic signal produced by a generator which is composed of micro-processor unit (MPU), digital-analogue conversion (DAC) and other modules just as described in Fig. 13, only with a MPU replacing a digital signal processor (DSP)
From the FFT of the primary voltage of the HF transformer, it is obvious that peaks are distributed continuously under chaotic pulse-width modulation (CPWM), as shown in Fig. 53, especially within the high frequency band, which is consistent with the simulation results shown in Fig. 51 and implies the electromagnetic interference (EMI) repression
Summary
Together with relativity and quantum mechanics, chaos is well considered as one of the three monumental scientific discoveries of the 20th century, which has been developed since the 1960s [Sharkovskii, 1964], and established in the 1970s [Li & Yorke, 1975]. One of the potential applications in power electronics technology is the suppression of EMI in switching-mode power supplies (SMPS) with chaotic modulation [Tse et al, 2003; Li et al, 2009; Aruna & Premalatha, 2012; Niu et al, 2013; Song et al, 2014; Niu et al, 2015]. Due to its high efficiency, low power consumption, small volume and light weight, the SMPS has been gradually adopted and deployed instead of This is an Open Access article published by World Scientific Publishing Company. As the frequency and amplitude of a carrier or a modulation signal are invariant, there are biggish peaks close to its fundamental frequency and its multiples over the spectrum This makes it difficult for converters to meet the international EMC standards, which are the market access standards for electrical and electronic products [Yang et al, 2006].
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