Optimal Design of Control Strategy for Full-Bridge LLC Converter

Zhu, Aiyun; Ma, Yong; Liu, Zisen; Lu, Huijun; Zhang, Fuchun

doi:10.1109/ecce44975.2020.9235736

Cited by 3 publications

References 13 publications

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Study of a Dual‐Loop Digital Control System for High‐Power Input‐Parallel Output‐Series Phase‐Shifted Full‐Bridge Converters Based on Pole Configuration

Yu,

Zhao

2024

Circuit Theory & Apps

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Digital control is characterized by mature analysis technology and easy implementation and is widely used in high‐power input‐parallel‐output series (IPOS) phase‐shifted full‐bridge (PSFB) converters. However, in modern industrial applications, most digital controllers are still designed with traditional technologies, such as PID control. Some characteristics of this control technology, such as control time delay and approximate design process, make the results fail to achieve the expected performance. At the same time, this digital control needs to be tested in the process of use, and the process is cumbersome and difficult to achieve. Based on the existing problems, this paper deduces a discrete state space model from the application of the IPOS‐PSFB converter, focusing on the characteristics of control delay. At the same time, this paper puts forward a double‐loop control strategy to ensure the accuracy of controller design. Among them, the current and voltage loop designs are independent. The current loop and voltage loop adopts two controllers, namely, the proportional controller and PI plus state feedback controller, and the parameters of the voltage loop controller are accurately calculated according to overshoot and bandwidth index. Finally, the IPOS‐PSFB converter is simulated and analyzed by MATLAB/Simulink software, and the controller's steady‐state performance and anti‐interference are analyzed.

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Study of a Dual‐Loop Digital Control System for High‐Power Input‐Parallel Output‐Series Phase‐Shifted Full‐Bridge Converters Based on Pole Configuration

Yu,

Zhao

2024

Circuit Theory & Apps

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Time-Domain-Based Phase-Shift Control Strategy for LLC Converters in EV Charger with Small DC-Link Capacitance

Cao,

Shi,

Cai

et al. 2024

2024 IEEE 10th International Power Electronics and Motion Control Conference (IPEMC2024-ECCE Asia)

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Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology

Xie

Wang²,

Zhang

et al. 2022

Energies

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Bidirectional DC/DC converters are widely adopted in new energy power generation systems. Because of the low conversion efficiency and non-isolation for conventional, bidirectional DC/DC converters in the photovoltaic energy storage complementary system, this paper proposes a bidirectional isolation LLC converter topology, with compensating inductance for the energy storage system; it has excellent characteristics, such as wide input voltage range and soft switching in full-load range. First, an AC equivalent model based on the fundamental wave equivalent method is established to derive the voltage gain. Meanwhile, a small signal model is also built to design a reasonably closed-looped controller. Finally, the improved bidirectional LLC resonant converter is applied to the photovoltaic energy storage complementary system. The correctness and feasibility for the bidirectional LLC converter topology under the proposed charging and discharging control strategy of the DC bus are verified by simulation and experimental results.

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Optimal Design of Control Strategy for Full-Bridge LLC Converter

Cited by 3 publications

References 13 publications

Study of a Dual‐Loop Digital Control System for High‐Power Input‐Parallel Output‐Series Phase‐Shifted Full‐Bridge Converters Based on Pole Configuration

Study of a Dual‐Loop Digital Control System for High‐Power Input‐Parallel Output‐Series Phase‐Shifted Full‐Bridge Converters Based on Pole Configuration

Time-Domain-Based Phase-Shift Control Strategy for LLC Converters in EV Charger with Small DC-Link Capacitance

Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology

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