OFDM-Based Intrinsically Safe Power and Signal Synchronous Transmission for CC-PT-Controlled Buck Converters

Yang Leng, Dongsheng Yu*, Kunfeng Han, Samson Shenglong Yu, Yihua Hu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Intrinsically safe power converters have been highly demanded in many harsh industrial environments, such as gas stations, chemical plants, and mine tunnels, to realize accurate voltage or current regulations with minimum safety risks. Communication among different devices is the key to realizing important operations, such as coordinated control, fault detection, and state update, for intrinsically safe converters. In this article, a capacitor current pulse train (CC-PT) control strategy is designed to increase the dynamic response of dc-dc converter with intrinsic operational safety. An orthogonal frequency-division multiplexing (OFDM) based power and signal synchronous transmission (PSST) method is then proposed. The mathematical models of signal modulation are established, and the intrinsic safety region is drawn in the L-C parameters plane, considering the requirements of electric performance, the inductor disconnection discharging, and output short-circuit tests. Simulations and prototype experiments are conducted and presented to verify the feasibility of the OFDM-based PSST in the CC-PT-controlled buck converter with intrinsically safe parameters.

Original languageEnglish
Pages (from-to)10319-10331
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number9
Early online date1 Apr 2022
Publication statusPublished - Sept 2022

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China under Grant 51977208.

Publisher Copyright:
© 1986-2012 IEEE.


  • Capacitor current pulses train control
  • dc power supply system
  • intrinsically safe converter
  • orthogonal frequency-division multiplexing (OFDM)
  • power and signal synchronous transmission (PSST)

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