High-Efficiency Bidirectional Three-Phase LCC Resonant Converter With a Wide Load Range

Ahn, Suk-Ho; Jang, Sung-Roc; Ryoo, Hong-Je

doi:10.1109/tpel.2018.2815078

Cited by 25 publications

(6 citation statements)

References 34 publications

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“…A theoretical peak efficiency of 97.7% was obtained at full load (Cetin and Yenil, 2018). The prototype study showed a conversion efficiency of 96% (Cao et al, 2019) The peak efficiency in different loading conditions reached 94.8% (Ramezani et al, 2019) An LCL converter efficiency of 94.2% was achieved at full load (Du and Bhat, 2016) while the dual-tank LCL-type DC-DC converter achieved 94.3% efficiency using Si MOSFETs for the full load (Bhatt, 2017) The maximum efficiency of the bidirectional three-phase LCC RC was about 92.2% during step-down mode and 91.7% during step-up mode (Ahn et al, 2019) The measured efficiency for the dual-tank LCLtype DC-DC converter using SiC MOSFETs is 97.1%, for the full load (Bhatt, 2017) Applications LLC is applied in electric vehicle battery charger applications (Cetin and Yenil, 2018;Wei et al, 2018), in photovoltaic applications (Rubino et al, 2013;Tayebi et al, 2018), in induction heating applications (Phadungthin and Haema, 2017), and in x-ray imaging (Ou et al, 2019). It is suitable for fuel-cell power systems (Jin and Ruan, 2006).…”

Section: Disadvantagesmentioning

confidence: 99%

Resonant Power Converters for Renewable Energy Applications: A Comprehensive Review

et al. 2022

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Studies on resonant power converters (RPCs) have received much attention due to the rapid growth of their potential in modern power and renewable energy applications such as photovoltaic, electric vehicles, wind, and fuel cells. Consequently, a significant number of studies focusing on RPC topologies for renewable energy applications is available. Generally, these studies have addressed several aspects, such as the development of their soft switching feature, smooth waveforms, high power density, and high efficiency. With this in mind, the present paper aims to review the development of the RPCs, challenges in their development, and comparison between common topologies as highlighted in literature. In addition, the use of RPCs in various applications of renewable energy is highlighted, focusing on some of the recently utilized topologies based on their constructions and achievements. There are still several issues and challenges in research that need to be considered for future improvement of the RPC performance in renewable energy applications. The improvement may require modifications on the circuit design or control strategies.

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Section: Disadvantagesmentioning

confidence: 99%

Resonant Power Converters for Renewable Energy Applications: A Comprehensive Review

et al. 2022

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“…The output voltage of LCC converter rises quickly. The power in the resonator is low, and the resonant current value reaches the maximum at the switching time [17].…”

Section: Analysis Of State Trajectory-based Startup For Lcc Convertermentioning

confidence: 99%

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

Zhao

Zhang

et al. 2022

WEVJ

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High voltage LCC resonant converters have been widely used in X-ray imaging systems in automobile nondestructive testing (NDT) applications. Low ripple voltage waveforms with fast-rising time under no-overshoot response are required for safety in such applications. The optimal state trajectory control (OTC) based on the state plane model is one of the most effective control methods to optimize transient response. Dynamic variations of the resonant voltages/currents are described as corresponding trajectories on the state plane. The transient relations can be determined by evaluating the geometric relationships of the trajectories. However, the LCC resonant converter has more state variables, resulting in more complex calculations that make the state trajectory control challenging. Furthermore, the startup duration is the most demanding process of the state trajectory control. In this paper, a digital implementation based on a hybrid controller built in a field-programmable gate array (FPGA) is proposed for LCC resonant converters with optimal trajectory startup control. A coordinated linear compensator is employed to control the switching frequency during steady-state conditions, hence eliminating the steady-state error. The experimental results were conducted on a 140-kV/42-kW LCC resonant converter for an X-ray generator. It achieves a short rising time of output voltage with no additional current or voltage stress in the resonant tank during startup compared to the conventional digital implementation control.

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“…There are thirty-six separate third-order RTN tanks [80,89,92]; some of them consist of two capacitors and one inductor, while others are opposite shaped, as shown in Figure 20a-d. Three-element RTN resonant converters have been widely used in many industries, such as in LLC, LCC, CLL, LCL, and hybrid series-to-parallel resonant converters (RCs) [93][94][95][96]. LLC and LCC are the commonest forms of third-order RTN converters.…”

Section: Control Switching Network (Csn)mentioning

confidence: 99%

A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

et al. 2021

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With the rapid development of modern energy applications such as renewable energy, PV systems, electric vehicles, and smart grids, DC-DC converters have become the key component to meet strict industrial demands. More advanced converters are effective in minimizing switching losses and providing an efficient energy conversion; nonetheless, the main challenge is to provide a single converter that has all the required features to deliver efficient energy for different types of modern energy systems and energy storage system integrations. This paper reviews multilevel, bidirectional, and resonant converters with respect to their constructions, classifications, merits, demerits, combined topologies, applications, and challenges; practical recommendations were also made to deliver clear ideas of the recent challenges and limited capabilities of these three converters to guide society on improving and providing a new, efficient, and economic converter that meets the strict demands of modern energy system integrations. The needs of other industrial applications, as well as the number of used elements for size and weight reduction, were also considered to achieve a power circuit that can effectively address the identified limitations. In brief, integrated bidirectional resonant DC-DC converters and multilevel inverters are expected to be well suited and highly demanded in various applications in the near future. Due to their highlighted merits, more studies are necessary for achieving a perfect level of reducing losses and components.

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High-Efficiency Bidirectional Three-Phase LCC Resonant Converter With a Wide Load Range

Cited by 25 publications

References 34 publications

Resonant Power Converters for Renewable Energy Applications: A Comprehensive Review

Resonant Power Converters for Renewable Energy Applications: A Comprehensive Review

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

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