A PFC Based EV Battery Charger Using a Bridgeless Isolated SEPIC Converter

Singh, Bhim; Kushwaha, Radha

doi:10.1109/tia.2019.2951510

Cited by 105 publications

(28 citation statements)

References 28 publications

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“…This is done by adding the small-signal perturbation to the input currents and voltages, output currents and voltages, and the duty cycle. Using ( 27), ( 28), (31), and small-signal approximation (perturbation is symbolized byˆ), the small-signal model of one module in Figure 12 is…”

Section: Intermediate Capacitor Designmentioning

confidence: 99%

“…This topology is suitable for low powers, and it employs a large number of components. In [31], bridge-less (BL) SEPIC PFC rectifiers have been proposed to reduce conduction losses, but no isolation is provided. Moreover, a bulky input inductor is required for filtering the input current harmonics, contributing to the system's size and copper losses.…”

Section: Doicmmentioning

confidence: 99%

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Development of a three‐phase interleaved converter based on SEPIC DC–DC converter operating in discontinuous conduction mode for ultra‐fast electric vehicle charging stations

Hussein

Abdi

Massoud

2021

IET Power Electronics

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One of the main challenges that impact transportation systems electrification is their batteries' charging process. This work presents the development of a three-phase ultra-fast Electric Vehicle (EV) charger based on the SEPIC converter. Since SEPIC operating in Discontinuous Conduction Mode (DCM) is usually recommended for low-power applications, this work proposes a scheme for its employment in high-power EV chargers. This is achieved through three single-phase modules of interleaved SEPIC converters. The presented scheme ensures reducing the stresses on the semiconductor devices since the power is divided over the interleaved modules. The design addresses DCM operation in terms of both capacitor voltage and inductor current (DCVM and DICM, respectively). This paper examines the analysis of the proposed converter and the small-signal modelling. Also, the converter efficiency is assessed. A Constant Current (CC) charging approach is deployed for charging the EV battery. The validation of the designs is explored through simulation results using MATLAB/Simulink platform. A 4 kW experimental prototype for the interleaved SEPIC DC-DC converter is built to verify the claimed contributions with 92% efficiency.

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Section: Intermediate Capacitor Designmentioning

confidence: 99%

Section: Doicmmentioning

confidence: 99%

Development of a three‐phase interleaved converter based on SEPIC DC–DC converter operating in discontinuous conduction mode for ultra‐fast electric vehicle charging stations

Hussein

Abdi

Massoud

2021

IET Power Electronics

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“…The boost topology and its derivatives are the most used topologies for the PFC [11][12] [13][14][15] [16][17] [18]. Other topologies such as buck-boost [19], Ćuk [20], SEPIC [21], and other stepdown converter [22] are also be used. We found that the IWJ topology is also suitable for the PFC stage, for the reason that its conversion ratio covers from some value to infinity, which provides the ability to convert the pulsating input voltage to a regulated constant output.…”

Section: Introductionmentioning

confidence: 99%

Active PFC stage based on synchronous inverse Watkins-Johnson topology

Luo

2021

IEICE Electron. Express

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Active power factor correction (PFC) technique is effectively used to improve the power factor and reduce the power exchanging loss, which behaves as a PWM-controlled emulated resistance to the ac power line. The boost topology and its derivatives are commonly applied for PFC stage. In this letter, from a topological point of view, an improved inverse Watkins-Johnson (IWJ) topology-based PFC stage is proposed, which holds several merits including ease of driving, synchronous mode, high efficiency, extra control dimension, and so forth. Theoretical analysis is conducted and an experimental prototype has been constructed to prove the feasibility of the proposed concept.

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“…Moreover, it has practical limitations such as high inrush current and unsatisfactory current handling capability under over load conditions [11]. To overcome these issues, the bridgeless SEPIC converter was introduced in the literature [11][12][13][14]. The bridgeless SEPIC converter offers many prominent merits such as limiting inrush current at startup and overloading conditions, reduced stresses to enhance the efficiency, and the ability to meet the challenges of a near unity power factor and output voltage regulation.…”

Section: Introductionmentioning

confidence: 99%

Power quality improvements of arc welding power supplies by modified bridgeless SEPIC PFC converter

2020

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This paper proposes an efficient bridgeless power factor corrected (PFC) modified single ended primary inductor converter (SEPIC) for arc welding power supplies (AWPS). The overall configuration is composed of two converters: (1) a modified bridgeless SEPIC PFC converter, which is controlled by a PI controller to achieve a high power factor and fast response; and(2) a full bridge buck converter with high-frequency transformer for high-frequency isolation to ensure arc welding stability. The proposed system is simulated under different operating conditions of an AWPS. It is also tested in real time by a hardware-in-the-loop system based on a dSPACE DS1103 control board. The system performances are evaluated based on power quality indices such as power factor, total harmonic distortions of the AC grid current, and voltage regulation. The obtained results show that the proposed controller enhances the weld bead quality by keeping a constant current at the output and a stable arc, meet the international power quality standards and robustness for voltage regulation.

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A PFC Based EV Battery Charger Using a Bridgeless Isolated SEPIC Converter

Cited by 105 publications

References 28 publications

Development of a three‐phase interleaved converter based on SEPIC DC–DC converter operating in discontinuous conduction mode for ultra‐fast electric vehicle charging stations

Development of a three‐phase interleaved converter based on SEPIC DC–DC converter operating in discontinuous conduction mode for ultra‐fast electric vehicle charging stations

Active PFC stage based on synchronous inverse Watkins-Johnson topology

Power quality improvements of arc welding power supplies by modified bridgeless SEPIC PFC converter

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