A Design Method of Compensation Circuit for High-Power Dynamic Capacitive Power Transfer System Considering Coupler Voltage Distribution for Railway Applications

Liang, Jianying; Wu, Dandan; Yu, Jin Yong

doi:10.3390/electronics10020153

Cited by 10 publications

(15 citation statements)

References 34 publications

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“…CWPT has been applied for low-power data transmission in applications such as biomedical implants [71], robots [72] or USB charging [73], among others [74,75]. Higher power applications such as railway applications [76] and the powering of electrical vehicles [77,78] are being recently studied. In the context of railway applications, a 3 kW power transfer system prototype was tested at a distance of 40 mm, yielding an efficiency of 92.5% [76].…”

Section: Capacitive Wireless Power Transfermentioning

confidence: 99%

Wireless Power Transfer for Unmanned Underwater Vehicles: Technologies, Challenges and Applications

Martínez de Alegría,

Rozas Holgado,

Ibarra

et al. 2024

Energies

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Unmanned underwater vehicles (UUVs) are key technologies to conduct preventive inspection and maintenance tasks in offshore renewable energy plants. Making such vehicles autonomous would lead to benefits such as improved availability, cost reduction and carbon emission minimization. However, some technological aspects, including the powering of these devices, remain with a long way to go. In this context, underwater wireless power transfer (UWPT) solutions have potential to overcome UUV powering drawbacks. Considering the relevance of this topic for offshore renewable plants, this work aims to provide a comprehensive summary of the state of the art regarding UPWT technologies. A technology intelligence study is conducted by means of a bibliographical survey. Regarding underwater wireless power transfer, the main methods are reviewed, and it is concluded that inductive wireless power transfer (IWPT) technologies have the most potential. These inductive systems are described, and their challenges in underwater environments are presented. A review of the underwater IWPT experiments and applications is conducted, and innovative solutions are listed. Achieving efficient and reliable UWPT technologies is not trivial, but significant progress is identified. Generally, the latest solutions exhibit efficiencies between 88% and 93% in laboratory settings, with power ratings reaching up to 1–3 kW. Based on the assessment, a power transfer within the range of 1 kW appears to be feasible and may be sufficient to operate small UUVs. However, work-class UUVs require at least a tenfold power increase. Thus, although UPWT has advanced significantly, further research is required to industrially establish these technologies.

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Section: Capacitive Wireless Power Transfermentioning

confidence: 99%

Wireless Power Transfer for Unmanned Underwater Vehicles: Technologies, Challenges and Applications

Martínez de Alegría,

Rozas Holgado,

Ibarra

et al. 2024

Energies

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“…When voltage stress on the coupling plates is too high, the air medium between the plates may be broken down, resulting in overcurrent and endangering the safety of the coupler itself. Reference [102] proposed a voltage stress optimization method, which can reallocate the voltage stress of system components by adjusting system parameters; Reference [103] proposed a voltage control method for the coupling coupler of the CPT system, which can limit the voltage between the coupling plates to a safe range.…”

Section: System Safety Researchmentioning

confidence: 99%

Research and Application of Capacitive Power Transfer System: A Review

Wang

Zhang

et al. 2022

Electronics

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Capacitive power transfer (CPT) uses an electric field as the transfer medium to achieve wireless power transfer (WPT). Benefitting from the low eddy current loss, simple system structure and strong plasticity of the coupling coupler, the CPT system has recently gained much attention. The CPT system has significantly improved transfer power, system efficiency, and transfer distance due to continuous research and discussion worldwide. This review briefly presents the basic working principle of the CPT system and summarizes the theoretical research in four aspects, including coupling coupler and high-frequency power converter. Following this, the review focuses on research in six key directions, including system modelling and efficiency optimization. The application of CPT technology in five fields, including medical devices and transportation, is also discussed. This review introduces the progress of CPT research in recent years, hoping to serve as a reference for researchers, to promote the further research and application of the CPT system.

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“…Over the last years high power applications become more viable due to the recent research into compensation circuits, suitable inverter stages and the plate structures. In particular, new high power applications such as underwater autonomous vehicles [18,35], railway applications [36,37] and the charging or powering of electrical vehicles [8,25,28,[38][39][40][41][42][43][44][45][46][47] are some prominent examples. In particular, the dynamic charging ability of CPT is considered promising [1].…”

Section: Literature Reviewmentioning

confidence: 99%

“…The plate structure largely determines the mutual capacity of the plates and thus the coupling coefficient k E . Some configurations can affect parameters such as the electric field emissions, compensation networks or misalignment [37,39,50,58,59].…”

Section: Plate Structuresmentioning

confidence: 99%

“…In railway applications, it is even possible to create a recurring current path via the wheels connected to the track; this setup can replace the maintenance-intensive pantograph of classic railway applications [37]. For charging electric vehicles, the parasitic capacitance between the chassis of the vehicle to be powered and the earth ground can function as current path to close the circuit [39].…”

Section: Two-plate Structurementioning

confidence: 99%

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A Review of the Current State of Technology of Capacitive Wireless Power Transfer

2021

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Wireless power transfer allows the transfer of energy from a transmitter to a receiver without electrical connections. Compared to galvanic charging, it displays several advantages, including improved user experience, higher durability and better mobility. As a result, both consumer and industrial markets for wireless charging are growing rapidly. The main market share of wireless power is based on the principle of inductive power transfer, a technology based on coupled coils that transfer energy via varying magnetic fields. However, inductive charging has some disadvantages, such as high cost, heat dissipation, and bulky inductors. A promising alternative is capacitive wireless power transfer that utilizes a varying electric field as medium to transfer energy. Its wireless link consists of conductive plates. The purpose of this paper is to review the state of the art, link the theoretical concepts to practical cases and to indicate where further research is required to take next steps towards a marketable product. First, we describe the capacitive link via a coupling model. Next, we highlight the recent progress in plate topologies. Additionally, the most common compensation networks, necessary for achieving efficient power transfer, are reviewed. Finally, we discuss power electronic converter types to generate the electric field.

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A Design Method of Compensation Circuit for High-Power Dynamic Capacitive Power Transfer System Considering Coupler Voltage Distribution for Railway Applications

Cited by 10 publications

References 34 publications

Wireless Power Transfer for Unmanned Underwater Vehicles: Technologies, Challenges and Applications

Wireless Power Transfer for Unmanned Underwater Vehicles: Technologies, Challenges and Applications

Research and Application of Capacitive Power Transfer System: A Review

A Review of the Current State of Technology of Capacitive Wireless Power Transfer

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