Electric Vehicles – Personal transportation for the future

Covic, Grant A.; Boys, J.T.; Budhia, Mickel; Huang, Chang-Yu

doi:10.3390/wevj4040693

Cited by 38 publications

(20 citation statements)

References 25 publications

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“…DD pads do not have a null in the power profile along the y-axis, allowing DD or DDQ on DD pads to be used in RPEV systems as outlined in [30]. Circular pads are not directional; however, they are unsuitable for RPEVs because a null occurs in the power profile at 40% of the pad diameter.…”

Section: Performance Of a Dd-ddq Pad System Compared To A Circumentioning

confidence: 98%

Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems

Budhia

Boys

Covic

et al. 2013

IEEE Trans. Ind. Electron.

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1,048

386

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Inductive power transfer is a practical method for recharging electric vehicles because it is safe, convenient, and reliable. The performance of the magnetic couplers that transfer power determines the overall feasibility of a complete system. Circular couplers are the most common topology in the literature; however, they have fundamentally limited coupling. Their flux patterns necessarily limit the operational air gap as well as tolerance to horizontal misalignment. A new polarized coupler topology [referred to as a double D (DD)] is presented, which overcomes these difficulties. DDs provide a charge zone five times larger than that possible with circular pads for a similar material cost and are smaller. A 0.31-m 2 DD enables 2 kW of power transfer over an oval area measuring 540 mm × 800 mm with a 200-mm air gap. Leakage magnetic fields have been investigated and show that circular and DD couplers operating under similar power transfer conditions produce similar levels. Both topologies can be designed and operated to ensure compliance with international guidelines.Index Terms-Contactless power transfer, magnetic analysis, magnetic fields.

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Section: Performance Of a Dd-ddq Pad System Compared To A Circumentioning

confidence: 98%

Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems

Budhia

Boys

Covic

et al. 2013

IEEE Trans. Ind. Electron.

Self Cite

1,048

386

View full text Add to dashboard Cite

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“…This 1 : 10 scale miniaturization allows us to experimentally validate analytic results. The designed coils are built with ferrite plates and Litz wire with the same number of turns (6). Figure 17 shows the coil of the full-size coupler and the corresponding miniaturized coil.…”

Section: Experimental Validationmentioning

confidence: 99%

“…Recently, as the need for EV charging and technological progress has increased, the transferred power and charging distance have increased from a few millimeters to a few hundred millimeters for kilowatt power levels [6,7].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Method for Dimensioning Magnetic Shielding for an Induction Electric Vehicle Charging System

Kadem¹,

Benyoubi²,

Bensetti³

et al. 2021

PIER

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Recently, the number of electric vehicles (EVs) is increasing due to the declining of oil resources and rising of greenhouse gas emission. However, EVs have not received wide acceptance by consumers due to the limitations of the stored energy and charging problems in batteries. The dynamic or in motion charging solution becomes a suitable choice to solve the battery related issues. Many researchers and vehicle manufacturers are working to develop an efficient charging system for EVs which is based on magnetic emissions to transfer power. These emissions must be evaluated and compared to limits specified by standards (in and outside the vehicle) in order to not cause harmful effects on their environment (humans, pets, electronic devices...). This paper presents an efficient method for modeling electromagnetic emission in near field and sizing a magnetic shield for a wireless power transfer (WPT) system for EVs. A model based on elementary magnetic dipoles is developed in order to obtain the same radiation as the real WPT coil. This model is used to size a magnetic shield which will be placed under the vehicle to protect human body from magnetic emissions. The obtained shielding plate allows to respect the standards of magnetic emission by bringing a decrease of 43 dB to the levels of magnetic fields. This approach is experimentally validated.

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“…Plug-in hybrid electric vehicles (PHEVs) and electric vehicles (EVs) are actively being developed and commercialized in response to environmental concerns [1]. PHEVs and EVs currently need to be connected to a power supply by electrical cables to charge their batteries.…”

Section: Introductionmentioning

confidence: 99%

10 kW Contactless Power Transfer System for Rapid Charger of Electric Vehicle

Yamanaka

Kaneko

Abe

et al. 2012

WEVJ

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A contactless power transfer system for charging electric vehicles requires a high efficiency, a large air gap, and a good tolerance to lateral misalignment and needs to be compact and lightweight. A double-sided winding 10 kW transformer based on a 1.5 kW H-shaped core transformer was developed for a rapid charger. Even though the transformer capacity was increased, the dimensions of the 10 kW transformer were almost the same as those of the 1.5 kW transformer. In this paper, the design concept for this 10 kW transformer and the results of experimental are described. The transformer was found to exhibit more than 94% efficiency with a mechanical gap of 70mm. Even for gap change and position change, an efficiency of over 92% was maintained. In a contactless power transfer system with a series resonant capacitor, the primary terminal voltage increases with increasing power. This overvoltage may lead to the problem of breakdown voltage of capacitor and the breakdown of winding insulation. To prevent such an overvoltage occurring, it is suggested that the primary winding and the series capacitor are split into two pieces or more respectively, and the split windings and capacitors are alternately connected in a series. Electric vehicles using a contactless power transformer for rapid charging would also uses normal charging. Therefore, the 10 kW transformer was designed to be compatible with the 1.5 kW transformer. Consequently, electric vehicles equipped with the 10 kW transformer can charge even using a 1.5 kW ground transformer, without decrease efficiency.

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Electric Vehicles – Personal transportation for the future

Cited by 38 publications

References 25 publications

Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems

Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems

An Efficient Method for Dimensioning Magnetic Shielding for an Induction Electric Vehicle Charging System

10 kW Contactless Power Transfer System for Rapid Charger of Electric Vehicle

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