Research on EMI and ripple suppression of LLC Resonant Converter based on symmetric chaotic spread spectrum

Spread spectrum technology can effectively reduce the peak value of electromagnetic interference(EMI), but it will bring more serious ripple problem to class E resonant converter. Based on spread spectrum modulation technology, this paper proposes a symmetrical chaotic spread spectrum method, which...

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Bibliographic Details
Main Authors: Wenrong, Yang, Haojie, Zhang, Tianchen, Huo, Junling, Luan, Yiwei, Qiao, Guohang, Chen
Format: Conference Proceeding
Language:English
Subjects:
Electromagnetic compatibility
Electromagnetic interference
electromagnetic interference(EMI)
Frequency modulation
LLC resonant converter
Resonant converters
Resonant frequency
ripple
Spread spectrum modulation
symmetric chaotic number
Voltage
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Summary:Spread spectrum technology can effectively reduce the peak value of electromagnetic interference(EMI), but it will bring more serious ripple problem to class E resonant converter. Based on spread spectrum modulation technology, this paper proposes a symmetrical chaotic spread spectrum method, which takes the traditional chaotic number as a symmetrical arrangement, so that the working frequency of the circuit changes with the symmetrical chaotic number, so as to achieve the effect of spread spectrum modulation, In this way, without changing the EMI suppression effect of the circuit, the voltage change of the circuit shows a central symmetrical trend, which reduces the ripple of the circuit to a certain extent, and the EMI of the circuit is also reduced due to the addition of spread spectrum signal.
ISSN:2640-7469
DOI:10.1109/APEMC53576.2022.9888734