A Simplified Sensorless Synchronous Rectification Method for Inner Phase Shift Control in CLLC Converters

Sun, Kai; Chen, Huan; Lu, Languang; Zhang, Kai; Wang, Le-Heng; Qin, Yudi

doi:10.1109/jestpe.2023.3276908

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…Moreover, J.Y. et al proposed a synchronous rectification method for the case in which the converter is in PSM mode [16][17][18]. Moreover, T. et al discussed the losses that may occur during PFM and PSM in CLLC resonant converters [19,20].…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Transition Algorithm Integrated with Hybrid Modulation for CLLC Resonant Converters

Qian,

Lin,

Tong

et al. 2023

Energies

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The CLLC resonant converter is a widely used bidirectional power converter known for its high energy transfer efficiency. To extend its operating range, the converter often employs a hybrid modulation strategy, which is valued for its simplicity and efficiency. However, at the critical transition point between pulse frequency modulation and phase-shift modulation, instability in the output can be observed due to repetitive and unnecessary mode changes caused by noise. In order to address this issue, this paper introduces a dynamic transition algorithm integrated with hybrid modulation. This approach adaptively updates the controller parameters to mitigate oscillations resulting from improper initial parameter settings. Additionally, it incorporates error analysis and hysteresis comparison to prevent false triggers caused by noise, enabling intelligent mode adjustments. Finally, a 1 kW prototype is designed to conduct experiments, demonstrating an approximately 50% improvement in dynamic performance when the converter operates with the dynamic transition algorithm.

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Section: Introductionmentioning

confidence: 99%

A Dynamic Transition Algorithm Integrated with Hybrid Modulation for CLLC Resonant Converters

Qian,

Lin,

Tong

et al. 2023

Energies

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“…• Enhanced efficiency and power density: CLLC converters aim for even higher efficiency and power density compared to LLC converters. They are designed to excel across a broad range of power levels, making them versatile for OBCs [152,153]. • Switching frequencies: Similar to LLC converters, CLLC converters can operate at high switching frequencies.…”

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confidence: 99%

Overview on Battery Charging Systems for Electric Vehicles

Dini,

Saponara,

Colicelli

2023

Electronics

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Catalyzed by the increasing interest in bi-directional electric vehicles, this paper delves into their significance and the challenges they encounter. Bi-directional electric vehicles not only serve as transportation but also function as essential electricity resources. Central to this energy revolution are On-Board Chargers (OBCs), which are pivotal in converting alternating (AC) energy into direct (DC) energy and vice versa. In this context, we explore the various circuit architectures of OBCs employed in bi-directional electric vehicles. We delve into the intricacies of rectifiers, switching converters, and the application of advanced control and filtering technologies. Our analysis extends to the implications of these circuit architectures on aspects such as voltage regulation capability, energy efficiency, and thermal management. Furthermore, we address the broader significance of these developments in the integration of bidirectional systems, which are driving advances in circuit architectures to better harness the energy flexibility of electric vehicles. We emphasize the critical role of bi-directional electric vehicles in the transition toward a smart and sustainable energy grid. To enhance accessibility for a diverse readership, we will provide concise definitions or explanations for technical terms used throughout the paper, ensuring that our work is approachable even for those who may not be experts in the field.

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State observation control strategy of bidirectional resonant DC/DC converter in building DC system

Li,

Wang,

Jin

et al. 2024

IET Renewable Power Gen

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This paper proposes a state observation control method for a bidirectional CLLLC resonant converter to solve the problem of output voltage stability of an isolated bidirectional DC–DC converter in building DC power distribution systems. Combining time domain and frequency domain analysis, this paper presents the modelling process of CLLLC converter from equivalent circuit analysis, harmonic approximation to extended description function rewriting. Then the design process of the state observation control method is given, that is, the linearization analysis is carried out according to the modelling results of the extended description function, the state equation of the converter is obtained, and the state observer and controller are designed according to the modern control theory. Finally, a full‐bridge CLLLC converter experimental platform is built. Experimental results show that the control method designed in this article can achieve steady‐state recovery of the output voltage under millisecond‐level load switching, and is superior to PI control in terms of overshoot and steady‐state performance.

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A Simplified Sensorless Synchronous Rectification Method for Inner Phase Shift Control in CLLC Converters

Cited by 4 publications

References 32 publications

A Dynamic Transition Algorithm Integrated with Hybrid Modulation for CLLC Resonant Converters

A Dynamic Transition Algorithm Integrated with Hybrid Modulation for CLLC Resonant Converters

Overview on Battery Charging Systems for Electric Vehicles

State observation control strategy of bidirectional resonant DC/DC converter in building DC system

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