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Integrated Linear Transformer-Based Diode Bridge Rectifier for Improved Power Quality in Electric Vehicle Charging Stations
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1  School of Electronics Engineering, VIT-AP University, Amaravati 522241, Andhra Pradesh, India
Academic Editor: Alessandro Lo Schiavo

Abstract:

Electric vehicle (EV) charging stations are becoming increasingly widespread, but their front-end rectifiers often degrade grid power quality by introducing high-input current harmonics, a low power factor, and voltage distortion. Although conventional diode bridge rectifiers (DBRs) are simple and low-cost, they typically exhibit total harmonic distortion (THD) exceeding 25% and power factors below 0.80. To address these issues, active power factor correction (PFC) techniques have been employed in the literature; however, they increase system complexity, cost, and control algorithm sophistication. Thus, this paper proposes a linear integrated transformer (ILT)-based DBR, which is designed to improve power quality in EV charging stations without relying on active control mechanisms. The proposed configuration integrates a linear transformer, passive filter network, and diode bridge to achieve both voltage step-down with galvanic isolation and harmonic mitigation in a single structure. This system offers improved voltage regulation, flux balancing, filter resonance, and reduced current distortion. The proposed system is validated using MATLAB/Simulink R2021a. The results demonstrate that it achieves a THD of 4.32%, complying with IEEE 519 harmonic standards. In addition, the input power factor improves to 0.981. The system also reduces the DC output voltage ripple from 6.8% to 1.2%, enhances voltage regulation by 9.1%, and increases overall efficiency to 96.3%. These findings establish the proposed ILT-DBR as an affordable, robust, and compact solution for next-generation EV charging infrastructure, specifically designed to meet the needs of smart grid deployment and integration in Tier-2 and Tier-3 cities, where simplicity and power quality compliance are priorities.

Keywords: Diode bridge rectifier; Electric vehicle charging; Linear transformer; Power factor; Power quality; Total harmonic distortion; Vehicle-to-grid technology
Comments on this paper
Ravikanth Garladinne
Interesting and good work

srinivas chalasani
Innovative work

DIMMITI RAO
Transformer based rectifier design effectively enhances power quality in EV charging stations.

Meghavathu Nayak
good work and good topic

Satya Nagamani Pothu
Good try inenhancing the power requirement of EV vehicles



 
 
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