Effect of coil geometry and shielding on wireless power transfer system

Kavitha, M.; Bobba, Phaneendra Babu; Prasad, D. H. L.

doi:10.1109/poweri.2016.8077154

Cited by 25 publications

(11 citation statements)

References 8 publications

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“…These would eliminate heating of the EV parts and could potentially increase mutual coupling between the coils by streamlining the magnetic flux through them. Moreover, these ferrite covers may be coated by a thin layer of aluminum, which will eliminate magnetic flux leakage [61]. However, analysis of the effects produced by a shielding material on mutual inductance is out of scope of this work.…”

Section: Description Of Coil Designmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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Abstract:Wireless power transfer provides an opportunity to charge electric vehicles (EVs) without electrical cables. Two categories of this technique are distinguished: Stationary Wireless Charging (SWC) and Dynamic Wireless Charging (DWC) systems. Implementation of DWC is more desirable than SWC as it can potentially eliminate challenges associated with heavy weight batteries and time-consuming charging processes. However, power transfer efficiency and range, lateral misalignment of coils as well as implementation cost are issues affecting DWC. These issues need to be addressed through developing coil architectures and topologies as well as operating novel semiconductor switches at higher frequencies. This study presents a small-scale dynamic wireless power transfer system for EV. It specifically concentrates on analyzing the dynamic mutual inductance between the coils due to the misalignment as it has significant influence on the EV charging process, particularly, over the output power and overall efficiency. A simulation study is carried out to explore dynamic mutual inductance profile between the transmitter and receiver coils. Mutual inductance simulation results are then verified through practical measurements on fabricated coils. Integrating the practical results into the model, an EV DWC power transfer simulation is conducted and the relation between dynamic mutual inductance and output power are discussed technically.

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Section: Description Of Coil Designmentioning

confidence: 99%

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

et al. 2018

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“…Another issue in wireless EV charging is the choice of resonant coil size. M. Kavitha [28] show that increasing the receiver coil size can reduce magnetic flux leakage, thereby increasing PTE. W. Zhang et al show that a larger receiver coil can improve the coupling coefficient when two resonant coils have misalignment [29].…”

Section: Introductionmentioning

confidence: 99%

Coil Design for Wireless Vehicle-to-Vehicle Charging Systems

et al. 2020

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Electric Vehicles (EVs) are seeing increasing worldwide adoption, largely due to their reduced greenhouse gas emissions and reliance on hydrocarbons. Slow advances in battery technology are one of major factors restricting the development of EVs. Many customers worry that their EV may run out of power during a journey, especially in colder climates. This paper proposes a vehicle-to-vehicle (V2V) charging system that works together with charging plug-in EVs, or operates independently. The new V2V charging technology helps to address problems due to a limited number of plug-in stations, as well as to reduce the risk of an EV running out of power during a journey. A novel transmitter coil structure is proposed for wireless V2V charging, to address issues caused by angular offset between the transmitting and receiving EV. Simulation results show that the novel transmitter coil structure is able to generate a stronger magnetic field than benchmark transmitter coils. An experimental prototype has been built for evaluation. Compared with the benchmark transmitter coil constructed from the same amount of materials, the novel transmitter coil structure offers more than 10 percent of efficiency improvement, which demonstrated by the 90% efficiency prototype. INDEX TERMS Vehicle to vehicle (V2V) charging, Wireless charging, Angular offset, Power transfer efficiency

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“…The inverters have wide range of applications in automobile industry and are creating a change of positivity in the electric vehicles. Electric vehicles require more output power so as to deliver and the inverters which are proposed in this literature are quite same as the requirement of it [7] [8]. The charging of the electric vehicles is done mainly through the WPT (Wireless Power Transfer) which is more comfortable than the conventional charging stations [6] and for that WPT these inverters are used for their efficiency.…”

Section: Introductionmentioning

confidence: 99%

Comparison of GAN, SIC, SI Technology for High Frequency and High Efficiency Inverters

Pullabhatla¹,

Bobba²,

Satyavani³

2020

E3S Web Conf.

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Power semiconductor devices plays a major role in efficient power conversion. As we have Silicon (Si), Silicon Carbide (SiC) and Gallium Nitride (GaN) based power devices, GaN technologies are ideal for working in high frequency power electronic systems (in MHz). Because the GaN has superior electron mobility and bandgap than the SiC and Si it has superior characteristics like low conduction losses, high switching rate so that there is better power efficiency than SiC, Si based inverter. Here we are using the Gan based High-Electron-Mobility Transistor (HEMT) and SiC and Si based mosfet in the inverter. The proposed inverter of different topologies is designed to transfer the power at >1MHz range. Comparison of the three different switches is done by the output power and the efficiency of the inverter. This paper presents the SPICE simulation results of the class d and class e inverter of output power 1KW.

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Effect of coil geometry and shielding on wireless power transfer system

Cited by 25 publications

References 8 publications

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

Precise Analysis on Mutual Inductance Variation in Dynamic Wireless Charging of Electric Vehicle

Coil Design for Wireless Vehicle-to-Vehicle Charging Systems

Comparison of GAN, SIC, SI Technology for High Frequency and High Efficiency Inverters

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