کنفرانس مهندسی برق ایران

صفحه اصلی / سی و سومین کنفرانس بین المللی مهندسی برق

A New Model of Interleaved Boost CF-CLLC Integrated Resonant Converter with Fixed-Frequency PWM Control for Renewable Energy Applications in Fuel Cell and Battery-Powered Electric Vehicles

نویسندگان :

Mina Taheri¹ Hossein Askariyan Abyane²

1- دانشگاه صنعتی امیرکبیر 2- دانشگاه صنعتی امیرکبیر

کلمات کلیدی :

Renewable energy،fixed-frequency PWM control،boost CF-CLLC،soft-switching and high-gain،wide voltage gain range،Fuel cell

چکیده :

Abstract— When a low-voltage fuel cell with significant power fluctuations is connected to an input terminal, a Boost-type CLLC converter controlled by fixed-frequency PWM modulation reduces the utilization of the fuel cell's energy. Under conditions where the duty cycle approaches 0.5, the converter operates with low efficiency. To maximize fuel cell energy utilization and improve conversion efficiency in a hybrid fuel cell and battery power system, this paper proposed a high-gain Boost CF-CLLC converter with soft switching, controlled by modulation pulse width modulation (PWM), designed for electric vehicles. Compared to conventional CLLC full-bridge converters, this design achieves enhanced voltage gain, an optimized operational region, minimized input current ripple, and reduced voltage stress on switches. Other advantages include a single-stage configuration and soft switching for all switches, contributing to high power conversion efficiency. Key specifications, such as gain, input current ripple, and zero-voltage switching (ZVS), are analyzed, alongside the impact of switching duty cycle variations on reverse current power, while maintaining a constant frequency. The design methodology for key parameters, along with three generalized input voltages of 48, 65, and 96 volts for integrated resonant boost converters, is also presented. Simulation results of a prototype with 48-96V input and 1 kW output confirm the proposed design considerations