A New Design Approach to Mitigating the Effect of Parasitics in Capacitive Wireless Power Transfer Systems for Electric Vehicle Charging

Sinha, Sitabhra; Kumar, Ashish; Regensburger, Brandon; Afridi, Khurram K.

doi:10.1109/tte.2019.2931869

Cited by 100 publications

(46 citation statements)

References 37 publications

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“…However, because of the very small capacitance between the road and vehicle conductive plates, effective power transfer can occur only at very high frequencies, making the design of these systems extremely challenging. With the recent availability of wide-bandgap power semiconductor devices that enable higher-frequency operation, high-power medium-range capacitive WPT systems are becoming viable [74]- [78].…”

Section: A Wireless Charging Technologiesmentioning

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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Section: A Wireless Charging Technologiesmentioning

confidence: 99%

E-Mobility — Advancements and Challenges

et al. 2019

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“…At the same time, various researchers have proposed different structures and shapes for the coils and each of these solutions has distinctive features, such as robustness to misalignment, reduction of the stray magnetic field, cost effectiveness, etc. [17]- [20]. However, in recent years, standardization processes have led to the definition of precise characteristics for static WPT systems applied to the charging of light-duty electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Quantification for SAE J2954 Compliant Static Wireless Charge Components

et al. 2020

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The present work aims at quantifying how, and how much, the uncertainties on the components and material parameters of a wireless power transfer (WPT) system for the static charge of electric vehicles affect the overall efficiency and functionality of the final produced device. With the aim of considering the perspective of a possible industrial developer, the parameters selected for the uncertainty quantification are chosen to be the capacitance values of the compensation capacitors and the electromagnetic material parameters used for the construction of the magnetic structure of a WPT system, i.e. the parameters of the elements to be purchased. The analysis is based on a standard system among the ones provided by the current SAE J2954 recommended practice.

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“…In order to address the above issues, several solutions have been proposed recently. The first solution utilizes widebandgap semiconductors (SiC/GaN) to operate the CPT charger at high frequency for compensating the low mutual capacitance and achieving high power density [17], [18]. Most of the recent CPT systems operate at a frequency of greater than 1 MHz.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the recent CPT systems operate at a frequency of greater than 1 MHz. In [18], the new design method of the 6.78-MHz CPT system is proposed to mitigate the negative effect of parasitic elements. The second approach uses the multi-modular architecture to achieve high power transfer while maintaining the safety limits [19], [20].…”

Section: Introductionmentioning

confidence: 99%

An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

Dahidah

Pickert

et al. 2020

IEEE Access

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This paper proposes an LCL-L compensation circuit for high power capacitive power transfer (CPT) aiming at minimizing number of resonant components and improving system performance. The proposed topology adopts only four external resonant components at both sides of the capacitive coupler. The output power is proportional to the capacitive coupling coefficient, therefore, it simplifies the design procedure and abolishes protection circuit requirements under coupler's misalignment. Moreover, optimizing efficiency at full-load conditions of compensation network can be easily achieved in this system by designing resonant components at the highest value of the mutual capacitance. Theoretical analysis of the proposed system is conducted alongside comparison to lasted CPT compensation circuits. Simulation and experimental results of a 1.5-kW CPT prototype with an air gap distance of 150 mm are provided to verify the feasibility and the effectiveness of the proposed system. System performances under different coupler's misalignment conditions and output power levels are also examined and discussed as well. INDEX TERMS Capacitive power transfer, compensation circuits, LCL-L topology, electric vehicles, battery charger.

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A New Design Approach to Mitigating the Effect of Parasitics in Capacitive Wireless Power Transfer Systems for Electric Vehicle Charging

Cited by 100 publications

References 37 publications

E-Mobility — Advancements and Challenges

E-Mobility — Advancements and Challenges

Uncertainty Quantification for SAE J2954 Compliant Static Wireless Charge Components

An Improved LCL-L Compensation Topology for Capacitive Power Transfer in Electric Vehicle Charging

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