Large air gap coupler for inductive charger

Sakamoto, Hiroshi; Harada, Kanako; Washimiya, S.; Takehara, Kousei; Matsuo, Yoshio; Nakao, F.

doi:10.1109/intmag.1999.837225

Cited by 31 publications

(27 citation statements)

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“…The selection of PPS and SPS topologies may done according to application requirement as SPS would not fit where less misalignment is expected but PPS can be useful. The Sakamato et al [56] presented an inductive coupler design that is capable of providing high self-inductance and less leakage inductance resulting in 8.3 kW of power transferred at an air gap of 3 mm with more than 97% efficiency.…”

Section: Secondary Series Compensatedmentioning

confidence: 99%

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

Kalwar

Aamir

Mekhilef

2015

Renewable and Sustainable Energy Reviews

166

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a b s t r a c tThe deficiency in the availability of petroleum products has given rise to the incorporation of electric vehicles (EVs) globally as a substitute for the conventional transportation system. Significant research has been pursued over last two decades in the development of efficient EV charging methods. A preliminary review of few methods developed for wireless charging revealed that ICPT is a promising and convenient method for the wireless charging of EVs. This paper includes the equivalent circuit analysis and characteristics of the ICPT system and focuses on the research progress in respect of the designs for the charging coil, leakage inductance compensation topologies, power level enhancement and misalignment toleration. The improvement in these factors has been essential for the implementation of EV charging. A brief discussion over design process and control of ICPT system has been added. Conclusions have been made on the basis of the information extracted from the literature and some future recommendations are provided.

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Section: Secondary Series Compensatedmentioning

confidence: 99%

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

Kalwar

Aamir

Mekhilef

2015

Renewable and Sustainable Energy Reviews

166

View full text Add to dashboard Cite

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“…For example, several IPTECs use coreless transformers, as shown in Fig. 10, where the primary winding is fixed on the ground and the secondary is installed on the car and may be positioned above the primary winding in any direction or alignment [14], [19], [26]- [28]. The value of MIPTC frequency is dependent on the resonance topology, capacitor capacity, and magnetic parameters of the IPT.…”

Section: Tracking the Frequency Of Miptcmentioning

confidence: 99%

“…IPT-based EV chargers (IPTECs) offer further development of conventional EV chargers. One of the best proposed structures for the IPTEC is the "disc-type transformer," which can be placed under the vehicle [19]. In [20], [21], [22], the geometries of a pair of spiral coils are optimized to maximize the inductive power transmission.…”

Section: Introductionmentioning

confidence: 99%

A New Maximum Inductive Power Transmission Capacity Tracking Method

Ameri¹,

Varjani²,

Mohamadian³

2016

Journal of Power Electronics

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In certain applications, such as IPT-based EV charger (IPTEC), any variation in alignment and distance between pickup and charger primary leads to a change in leakage and magnetic impedance magnitudes. The power transmission capacity is not always at the maximum level because of these variations. This study proposes a new low-cost tracking method that achieves the Maximum Inductive Power Transmission Capacity (MIPTC). Furthermore, in the proposed method, the exchange of information between load and source is not required. For an application such as IPTEC, the load detected by the IPTEC varies continuously with time because of the change in state of the charge. This load variation causes a significant variation in IPT resonant circuit voltage gain. However, the optimized charging output voltage should be kept constant. From the analysis of the behavior of the IPT circuit at different working frequencies and load conditions, a MIPTC operation point that is independent of load condition can be identified. Finally, the experimental results of a developed prototype IPT circuit test show the performance of the proposed method.

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“…The aluminum ring and backing plate shield the chassis of the EV and surrounding area from stray magnetic fields [7]. Alternative power couplers are; pot cores [8], U-shaped cores [9], ferrite discs or plates [10][11] or E-cores [12]. All of these are comparatively fragile and expensive due to the geometry of the large pieces of ferrite required to achieve the desired power transfer flux path.…”

Section: Single Phase Charging Padsmentioning

confidence: 99%

Electric Vehicles – Personal transportation for the future

Covic

Boys

Budhia

et al. 2010

WEVJ

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Plug-in EVs are being heralded as a step towards acceptance of pure EV's. However concerns remain regarding uptake by consumers, in terms of range anxiety and economic operation. These concerns are mitigated if energy can be transferred to the vehicle while it is moving, but there are implications in terms of the highway infrastructure required without restricting a vehicle's freedom to move while providing power over air-gaps in excess of 200mm. Such flexibility brings with it problems that are not normally inherent in stationary systems where electronic alignment may be employed to control magnetic coupling.The system must cope with variances as seen by both the power supply and the EV, while ensuring that the power receiver is compatible with both stationary and roadway systems. This paper discusses recent developments in wireless charging infrastructure for EV's and describes systems that may be suitable in future. As vehicles operate on the Grid they will constitute a substantial load that must be managed. A solution is presented here at little infrastructural cost such that the Grid, 'on load' has better power quality than 'off-load'.

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Large air gap coupler for inductive charger

Cited by 31 publications

References 0 publications

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

Inductively coupled power transfer (ICPT) for electric vehicle charging – A review

A New Maximum Inductive Power Transmission Capacity Tracking Method

Electric Vehicles – Personal transportation for the future

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