Six‑phase drive‑based integrated onboard battery charger for electric vehicles considering zero‑sequence circulating current elimination

Ting Ji; Feng Yu; Qihao Yin; Xing Liu

Six‑phase drive‑based integrated onboard battery charger for electric vehicles considering zero‑sequence circulating current elimination

Vol. 23, No. 3, pp. 478-490, Mar. 2023

10.1007/s43236-022-00546-3

Integrated onboard battery charger

Six-phase drive

Zero-sequence circulating current

Finite control set model predictive control

Control set

Abstract

The concept of the integrated onboard battery charger (IOBC) provides electric vehicles (EVs) with access to the integration of the drivetrain and the charger. In this paper, an IOBC based on a six-phase drive is studied. In the charging mode, the IOBC is equivalent to a paralleled three-phase voltage source rectifier (PTP-VSR) with common ac and dc sides. Such operation leads to a zero-sequence circulating current (ZSCC), which causes current waveform distortion and the resultant power loss. This paper proposes a novel ZSCC elimination strategy, which is in principle tied to finite control set model predictive control (FCS-MPC). By modifying the control set (CS), the ZSCC can be naturally circumvented without increasing the complexity of the control system. Furthermore, an enhanced phase-locked loop (EPLL) based on the second-order generalized integrator (SOGI) is proposed, by which, only sampling a line voltage is required. Finally, the effectiveness of the proposed strategy and EPLL are experimentally validated.

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Cite this article

[IEEE Style]

T. Ji, F. Yu, Q. Yin, X. Liu, "Six‑phase drive‑based integrated onboard battery charger for electric vehicles considering zero‑sequence circulating current elimination," Journal of Power Electronics, vol. 23, no. 3, pp. 478-490, 2023. DOI: 10.1007/s43236-022-00546-3.

[ACM Style]

Ting Ji, Feng Yu, Qihao Yin, and Xing Liu. 2023. Six‑phase drive‑based integrated onboard battery charger for electric vehicles considering zero‑sequence circulating current elimination. Journal of Power Electronics, 23, 3, (2023), 478-490. DOI: 10.1007/s43236-022-00546-3.