A Current-Fed Dual-Half-Bridge-Based Composite Converter With Improved Light-Load Efficiency Through a Multi-Variable Optimization

Nan Lin

doi:10.1109/TTE.2021.3126726

2022-06-01

DOI：10.1109/TTE.2021.3126726

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摘要

En 中文

Due to its frequent occurrence in the electric vehicle (EV) and hybrid electric vehicle (HEV) applications, light-load efficiency of the dc-dc converter is critical. Different from the conventional boost converter, in this work, a novel composite converter is proposed and investigated to achieve significantly improved light-load efficiency. The proposed converter consists of a current-fed dual-half-bridge (CF-DHB) converter module and a boost converter module, which can be controlled and optimized independently. The interconnection of the two modules leads to advantages, such as lower voltage stress across the power device and a wide conversion ratio. In this article, a multi-variable efficiency optimization method is proposed utilizing the topology advantages of the proposed converter to address the light-load efficiency issue. Based on the loss model, the power sharing between the two converter modules and the switching frequency of the boost converter module are optimized at light load. A 30-kW silicon carbide (SiC)-based composite dc-dc converter prototype is built to validate the proposed multi-variable efficiency optimization method in the light-load operating conditions. Extensive experimental results are presented to demonstrate the noticeable efficiency improvement brought by the proposed method.

Keyword:

Topology

Zero voltage switching

Inductors

Hybrid electric vehicles

Voltage

Stress

Switches

Composite converter

current-fed dual-half-bridge (CF-DHB)

efficiency improvement

light load

multi-variable optimization

期刊

IEEE Transactions on Transportation Electrification

IF:

8.3

论文数:

2.9K

被引数:

1.6W

机构

University of Arkansas System

学者数:

1.9W

论文数: 1.5W

被引数: 295

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