期刊
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
卷 58, 期 1, 页码 423-434出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2021.3120028
关键词
Topology; Transformers; Inductors; Switches; Voltage; Batteries; Capacitors; Battery chargers; discontinuous conduction mode; enhanced power quality; light electric vehicle (LEV); switched inductor single ended primary inductance converter (SISEPIC)
The limited voltage gain characteristic of the mainstream dc-dc converter restricts its application in single-stage light electric vehicles' (LEVs) chargers. Therefore, this article presents a transformerless single-stage bridgeless charger topology to achieve a simple, reliable, efficient, and low-cost charger for the LEVs. The topology utilizes a switched inductor single ended primary inductance converter (SISEPIC) to achieve a high step-down dc voltage gain, along with active power factor correction for enhanced power quality.
The limited voltage gain characteristic of the mainstream dc-dc converter restricts the application in single-stage light electric vehicles' (LEVs) chargers. Typically, the battery voltage of an LEV is in the range from 24 to 72 V. Thus, while implementing the single-stage LEVs' chargers, a line- or high-frequency transformer is essentially required. The utilization of transformer, however, compromises the overall cost, size, and efficiency of LEV chargers. Therefore, a transformerless single-stage bridgeless charger topology is presented in this article, aiming to realize a simple, reliable, efficient, and low-cost charger for the LEVs. The presented topology utilizes a switched inductor single ended primary inductance converter (SISEPIC) to achieve a high step-down dc voltage gain. Furthermore, the active power factor correction is incorporated to ensure enhanced power quality (low total harmonics distortion and unity power factor) at the ac supply side during constant current and constant voltage state charging. Additionally, this charger is controlled by employing reduced sensing devices and control complexities. Both simulation and experimental validations are provided to manifest the effectiveness of this SISEPIC charger topology for LEVs.
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