Kilowatt-scale large air-gap multi-modular capacitive wireless power transfer system for electric vehicle charging

Regensburger, Brandon; Sinha, Sitabhra; Kumar, Ashish; Vance, Jason; Popović, Zoya; Afridi, Khurram K.

doi:10.1109/apec.2018.8341083

Cited by 52 publications

(17 citation statements)

References 16 publications

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“…There are two major WPT technologies, inductive power transfer (IPT) and capacitive power transfer (CPT). In the strongly coupled regime, magnetic resonance couples transmitting and receiving coils and realises IPT, while CPT is realised through electric field interaction between coupled capacitors [8]. The coupling capacitance of such capacitors is determined by the available area of the devices [9].…”

Section: Take Down Policymentioning

confidence: 99%

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A critical review on wireless charging for electric vehicles

Machura

2019

Renewable and Sustainable Energy Reviews

217

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Electric vehicles (EVs) have recently been significantly developed in terms of both performance and 10 drive range. There already are various models commercially available, and the number of EVs on road 11 increases rapidly. Although most existing EVs are charged by electric cables, companies like Tesla, 12 BMW and Nissan have started to develop wireless charged EVs that don't require bulky cables. 13 Rather than physical cable connection, the wireless (inductive) link effectively avoids sparking over 14 plugging/unplugging. Furthermore, wireless charging opens new possibilities for dynamic chargingcharging while driving. Once realised, EVs will no longer be limited by their electric drive range and the requirement for battery capacity will be greatly reduced. This has been prioritised and promoted worldwide, particularly in UK, Germany and Korea. This paper presents a thorough literature review on the wireless charging technology for EVs. The key technical components of wireless charging are summarised and compared, such as compensation topologies, coil design and communication. To enhance the charging power, an innovative approach towards the use of superconducting material in coil designs is investigated and their potential impact on wireless charging is discussed. In addition, health and safety concerns about wireless charging are addressed, as well as their relevant standards. Economically, the costs of a wide range of wireless charging systems has also been summarised and compared.

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Section: Take Down Policymentioning

confidence: 99%

“…To form a resonance circuit 3 with maximum power transfer capability, this frequency must be equal to the resonance frequency ω 0 , where the reactive parts in (3)-(7) cancel out. Assuming identical coils in the primary and secondary circuit, the resonance frequency can be calculated using (8).…”

Section: Compensation Topologies 29mentioning

confidence: 99%

A critical review on wireless charging for electric vehicles

Machura

2019

Renewable and Sustainable Energy Reviews

217

View full text Add to dashboard Cite

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“…These include techniques traditionally used for beamforming in radars and other far-field applications [84]. Near-field phased-array field focusing approaches that use multiple phase-shifted WPT couplers to achieve reductions in fringing fields provide numerous opportunities for innovation [85], [86].…”

Section: B Wireless Charging Challengesmentioning

confidence: 99%

E-Mobility — Advancements and Challenges

et al. 2019

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Mobile platforms cover a broad range of applications from small portable electric devices, drones, and robots to electric transportation, which influence the quality of modern life. The end-to-end energy systems of these platforms are moving toward more electrification. Despite their wide range of power ratings and diverse applications, the electrification of these systems shares several technical requirements. Electrified mobile energy systems have minimal or no access to the power grid, and thus, to achieve long operating time, ultrafast charging or charging during motion as well as advanced battery technologies are needed. Mobile platforms are space-, shape-, and weight-constrained, and therefore, their onboard energy technologies such as the power electronic converters and magnetic components must be compact and lightweight. These systems should also demonstrate improved efficiency and cost-effectiveness compared to traditional designs. This paper discusses some technical challenges that the industry currently faces moving toward more electrification of energy conversion systems in mobile platforms, herein referred to as E-Mobility, and reviews the recent advancements reported in literature. INDEX TERMS Battery technology, fast charging, high-frequency magnetic materials, high-power-density converters, hybridized battery systems, more electric powertrains, wireless charging. I. INTRODUCTION Next-generation mobile platforms, ranging from handheld devices, mobile robots, and drones to automobiles, aircraft, and ships, require small, light, cost-effective, and longer operating energy systems to meet more aggressive mission profiles [1]-[3]. At the same time, most of these mobile platforms are moving toward more electrification, i.e., electrified-mobility (E-Mobility), if not fully there already. E-Mobility, herein, refers to more electrification of energy conversion systems in mobile platforms. E-Mobility opens new opportunities to meet the required energy system objectives, while also presenting new challenges. As an example The associate editor coordinating the review of this manuscript and approving it for publication was Xiaosong Hu .

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“…To reduce the leakage EMF, ferrite was used to optimize the magnetic path, and the pulse width of an inverter was adjusted to reduce the harmonics of the EMF [46]. A multimodular WPT system with opposite phase adjacent modules was introduced to cancel the leakage electromagnetic emissions in both an inductive WPT system [47] and a capacitive WPT system [48]. In these structures, the radiated electromagnetic emissions were canceled from each channel.…”

Section: Introductionmentioning

confidence: 99%

Foreign Object Detection for Electric Vehicle Wireless Charging

Xia

Yuan

et al. 2020

Electronics

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Wireless power transfer technology is being widely used in electric vehicle wireless-charging applications, and foreign object detection (FOD) is an important module that is needed to satisfy the transmission and safety requirements. FOD mostly includes two key parts: metal object detection (MOD) and living object detection (LOD), which should be implemented during the charging process. In this paper, equivalent circuit models of a metal object and a living object are proposed, and the FOD methods are reviewed and analyzed within a unified framework based on the proposed FOD models. A comparison of these detection methods and future challenges is also discussed. Based on these analyses, detection methods that employ an additional circuit for detection are recommended for FOD in electric vehicle wireless-charging applications.

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Kilowatt-scale large air-gap multi-modular capacitive wireless power transfer system for electric vehicle charging

Cited by 52 publications

References 16 publications

A critical review on wireless charging for electric vehicles

A critical review on wireless charging for electric vehicles

E-Mobility — Advancements and Challenges

Foreign Object Detection for Electric Vehicle Wireless Charging

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