Two Low-Loss Large Current Rectifiers Based on Low KVA Rating Wye-Connected Autotransformers

Fangang Meng; Zhongcheng Man; Quanhui Li; Lei Gao

Two Low-Loss Large Current Rectifiers Based on Low KVA Rating Wye-Connected Autotransformers

Vol. 18, No. 6, pp. 1697-1707, Nov. 2018

10.6113/JPE.2018.18.6.1697

Double star rectifier (DSR)

Large current rectifier

Three-phase half-wave rectifier

Wye-connected autotransformer

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Abstract

In this paper, two large current rectifiers are proposed based on two wye-connected autotransformers. The requirements of the ideal large current rectifier are analyzed, and it is concluded that the large current rectifier has a higher power density and a higher energy conversion efficiency when it is made up of two three-phase half-wave rectifiers and a wye-connected autotransformer. According to theoretical analysis results, the two novel wye-connected autotransformers are designed to feed two three-phase half-wave rectifiers. The two autotransformers can generate two groups of three-phase voltages with a 60o phase shifting, and their kVA ratings account for 95% and 80% of the load power, respectively. These values are less than those of a double star rectifier at 30% and 46%. From the input mains and output side, the power quality of the proposed rectifiers is the same as that of the double star rectifier. Some experiments validate the correctness of the theoretical analysis.

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Cite this article

[IEEE Style]

F. Meng, Z. Man, Q. Li, L. Gao, "Two Low-Loss Large Current Rectifiers Based on Low KVA Rating Wye-Connected Autotransformers," Journal of Power Electronics, vol. 18, no. 6, pp. 1697-1707, 2018. DOI: 10.6113/JPE.2018.18.6.1697.

[ACM Style]

Fangang Meng, Zhongcheng Man, Quanhui Li, and Lei Gao. 2018. Two Low-Loss Large Current Rectifiers Based on Low KVA Rating Wye-Connected Autotransformers. Journal of Power Electronics, 18, 6, (2018), 1697-1707. DOI: 10.6113/JPE.2018.18.6.1697.