International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
www.irjet.net
Design and Implementation of Isolated Zeta-Luo Converter for EV Charging Applications PRACHI SINGH1, ABHISHEK KUMAR SINGH2, SRAJAN S KUMAR3 ,DIVYANSHI SHARMA4 1
Student, Department of EE, JSS Academy of Technical Education, Noida, Uttar Pradesh
2Assistant Professor, Department of EE, JSS Academy of Technical Education, Noida, Uttar Pradesh
Student, Department of EE, JSS Academy of Technical Education, Noida, Uttar Pradesh Student, Department of EE, JSS Academy of Technical Education, Noida, Uttar Pradesh ---------------------------------------------------------------------***--------------------------------------------------------------------3 4
Abstract - This study presents a novel approach to
The proposed implementation incorporates synchronous rectification and soft-switching techniques, resulting in a cost-effective, flexible, reliable, and efficient solution.
designing a charger for battery electric vehicles (BEVs) by utilizing an enhanced Zeta-Luo converter. The Zeta-Luo converter, a modified combination of the Zeta and Luo converters, is specifically tailored to operate during individual halves of the supply voltage, thereby improving power quality at the output. The key advantage of this design lies in its ability to enhance charger efficiency compared to other converters, while ensuring a consistent charging current for the battery. Both the improved Zeta converter and the Luo converter are set to operate in discontinuous conduction mode (DCM), which brings about cost and size reductions. The proposed model will be developed using MATLAB/Simulink.
The advantages of the suggested BL converter for electric vehicle (EV) charging encompass higher efficiency, a reduced component count, and the characteristic to work during both positive and negative supply cycles in either Zeta or Luo mode. This achievement is made possible by integrating two different converters and utilizing a cascaded PI controller that identifies the charging modes of the EV battery. The constant current and constant voltage modes are employed for efficient battery charging, with the PI controller ensuring a consistent charging current and voltage throughout these modes. In summary, the proposed BL converter offers a promising solution for efficient and reliable EV charging.
Key Words: Zeta Converter, Luo Converter, Zeta-Luo Converter, Discontinuous Conduction Mode, EV Charging, Power Quality
The application of a cascaded PI controller in the constant current-constant voltage (CC-CV) mode enables precise and stable charging of the EV battery, ensuring safety and reliability. The integration of Zeta-Luo converters during the two half cycles allows for improved efficiency and reduced switching losses, resulting in enhanced power density and overall charger performance. Furthermore, the reduced number of components and devices in the converter contributes to a more compact and cost-effective design. The utilization of discontinuous conduction mode (DCM) further enhances charger efficiency and reduces its size and cost.
1.INTRODUCTION DC-DC converters have undergone extensive development over the past six decades and have found widespread use in industrial applications and computer circuits. With the electronics industry trending towards low voltage and highpower density, the technology has witnessed rapid advancements and significant transformations. The DC-DC converter market is experiencing a faster growth rate of 7.5% compared to the AC-DC power supply market. While a simple voltage divider can serve as a basic DC-DC converter, it suffers from poor efficiency and can only transfer output voltage lower than the input voltage. To overcome these limitations, the multiple-quadrant chopper emerged as the next stage in DC-DC conversion, aiming to convert DC energy between different voltage levels. This bears similarity to the function of a transformer in AC-AC conversion.
2.OPERATION OF ZETA LUO CONVERTER The selection of the magnetizing inductance value is specifically tailored to enable the converter to operate in discontinuous conduction mode (DCM), a mode known for its ability to minimize conduction losses and maximize overall efficiency. An interesting aspect of this design is that both converters utilize the same output inductors, resulting in a notable reduction in the quantity of components and devices used in the converter, resulting in a smaller size and reduced cost.
In the current era, addressing environmental concerns, particularly pollution from hydrocarbon gases in transportation, has become a crucial issue. To promote green transportation, electric vehicles are being vastly adopted. Within electric vehicles, the DC-DC converter plays an important role in supplying power to auxiliary loads, necessitating efficient energy transfer between the high voltage and low voltage sides. This enables smooth operation and functionality for various vehicle components.
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The converter's control mechanism is accomplished through the utilization of a cascaded proportional-integral (PI) controller. This controller ensures the proper charging of the battery in both the constant current and constant voltage
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