Design methodology of a voltage controller for a dual‑active‑bridge converter utilizing spread‑spectrum modulation

Gwon-Gyo Jung; Jun-Suk Lee; Ho-Sung Kim; Jee-Hoon Jung

Design methodology of a voltage controller for a dual‑active‑bridge converter utilizing spread‑spectrum modulation

Vol. 25, No. 3, pp. 393-404, Mar. 2025

10.1007/s43236-024-00964-5

Dual-active-bridge (DAB)

Spread-spectrum modulation (SSM)

Small-signal modeling

Controller design

Electromagnetic interference (EMI)

Output voltage ripple reduction

Abstract

This work proposes a design methodology of a voltage controller for a dual-active-bridge (DAB) converter utilizing spreadspectrum modulation (SSM) to distribute EM noise based on a small-signal model and its analysis. When power electronic devices operate at a fixed switching frequency, high EM noise concentrates at the switching frequency and its harmonics. The SSM is a switching modulation technique that reduces the EM noise by varying the operating frequency to distribute noise according to the frequency domain. When the SSM is applied, the DAB converter operates with variable switching frequencies. Given that the output voltage of the DAB converter depends on the switching frequency, the SSM affects it. Accordingly, a controller must be designed based on the small-signal model that considers the frequency variation caused by the SSM. In this work, the controller for regulating the output voltage is designed using the small-signal model of the DAB converter utilizing the SSM, and the converter performance is verified through simulations and experimental measurements with a 3.3 kW prototype converter.

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Cite this article

[IEEE Style]

G. Jung, J. Lee, H. Kim, J. Jung, "Design methodology of a voltage controller for a dual‑active‑bridge converter utilizing spread‑spectrum modulation," Journal of Power Electronics, vol. 25, no. 3, pp. 393-404, 2025. DOI: 10.1007/s43236-024-00964-5.

[ACM Style]

Gwon-Gyo Jung, Jun-Suk Lee, Ho-Sung Kim, and Jee-Hoon Jung. 2025. Design methodology of a voltage controller for a dual‑active‑bridge converter utilizing spread‑spectrum modulation. Journal of Power Electronics, 25, 3, (2025), 393-404. DOI: 10.1007/s43236-024-00964-5.