Title: DCPWM-based conducted EMI noise mitigation in ULL converter for EV applications

Authors: Srinivasan Kalaiarasu; Sudhakar Natarajan

Addresses: School of Electrical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India ' School of Electrical Engineering, Vellore Institute of Technology, Vellore, Tamilnadu, India

Abstract: Conducted electromagnetic interference (EMI) noises are produced due to the fast-switching process in power converters and result in the degradation of power electronic components in electric vehicles (EVs). In this work, a DCPWM technique-based EMI mitigation process has been proposed for a high gain ultra-lift Luo-converter. Due to the high switching frequency of 200 kHz, EMI noise has been generated. By implementing the DCPWM technique, the above-mentioned issues are nullified. The conducted EMI mitigation level is analysed through common-mode noise, differential-mode noise, and power spectrum density. In this proposed method, a field-programmable gate array has been used to generate digital chaotic pulses by applying an RCFMFD approach. From the observation, 16 dBV, which is equal to 6 V of conducted EMI noise, has been reduced as per EMC-CISPR 11 standard limit by executing the proposed DCPWM technique compared with the periodic PWM technique in the ultra-lift Luo-converter for EV applications.

Keywords: conducted EMI; power spectrum density; PSD; digital chaotic pulse width modulation; DCPWM; field-programmable gate array; FPGA; randomised carrier frequency modulation with a fixed duty cycle; RCFMFD.

DOI: 10.1504/IJPELEC.2023.131418

International Journal of Power Electronics, 2023 Vol.18 No.1, pp.91 - 118

Received: 13 Dec 2021
Accepted: 28 May 2022
Published online: 11 Jun 2023 *

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