A two-way inductive power interface for single loads

Madawala, Udaya K.; Thrimawithana, Duleepa J.

doi:10.1109/icit.2010.5472722

Cited by 25 publications

(10 citation statements)

References 14 publications

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“…Consequently, techniques for charging and discharging of EVs, with emphasis on simplicity, low cost, convenience, high efficiency, and flexibility, have become the main focus of current research in both industrial and academic communities, whose fields of interests are in V2G and sustainable living. Contactless or wireless charging techniques are emerging as a viable choice as they meet most of the aforementioned attributes [13]- [15].…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional Inductive Power Interface for Electric Vehicles in V2G Systems

Madawala

Thrimawithana

2011

IEEE Trans. Ind. Electron.

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685

219

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Demand for supplying contactless or wireless power for various applications, ranging from low-power biomedical implants to high-power battery charging systems, is on the rise. Inductive power transfer (IPT) is a well recognized technique through which power can be transferred from one system to another with no physical contacts. This paper presents a novel bidirectional IPT system, which is particularly suitable for applications such as plug-in electric vehicles (EVs) and vehicle-to-grid (V2G) systems, where two-way power transfer is advantageous. The proposed IPT system facilitates simultaneous and controlled charging or discharging of multiple EVs through loose magnetic coupling and without any physical connections. A mathematical model is presented to show that both the amount and direction of power flow between EVs or multiple systems can be controlled through either phase or/and magnitude modulation of voltages generated by converters of each system. The validity of the concept is verified by theoretical analysis, simulations, and experimental results of a 1.5-kW prototype bidirectional IPT system with a 4-cm air gap. Results indicate that the proposed system is an ideal power interface for efficient and contactless integration of multiple hybrid or EVs into typical power networks.

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Section: Introductionmentioning

confidence: 99%

A Bidirectional Inductive Power Interface for Electric Vehicles in V2G Systems

Madawala

Thrimawithana

2011

IEEE Trans. Ind. Electron.

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685

219

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“…Each LCL circuit is tuned to the track frequency, generated by the primary supply, and each reversible rectifier is operated at the same track frequency either in the inverting or rectifying mode, depending on the direction of the power flow. Voltages and phase angle between the reversible rectifiers will determine the amount and direction of power flow, as described in [5][6][7]. Figure 1.…”

Section: A a Typical Single Phase Systemmentioning

confidence: 99%

“…Although contactless charging of EVs is still expensive in comparison to wired charging, it offers advantages in relation to reliability, safety and convenience. Thus, contactless charging is becoming popular as an effective and efficient means of charging EVs [5][6].…”

Section: Introductionmentioning

confidence: 99%

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A three-phase bi-directional IPT system for contactless charging of electric vehicles

Thrimawithana

Madawala

2011

2011 IEEE International Symposium on Industrial Electronics

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Contactless and bi-directional power transfer is preferable for applications such as electric vehicles (EVs) and vehicle-to-grid (V2G) systems. This paper presents a new threephase and bi-directional IPT system that is suitable for rapid charging of EVs or high power V2G systems. The proposed system uses a three-phase track, which is coupled to a threephase pick-up through weak magnetic coupling. Both track and pick-up are var compensated through an inductor-capacitorinductor (LCL) resonant circuit and driven by reversible rectifiers. A mathematical model is presented to show that power transfer from the track (primary) side to the pick-up side in both directions can be controlled through either magnitude or relative phase angle of the voltages generated by reversible rectifiers. The viability of the proposed concept is demonstrated using simulations, and results suggest that the three-phase IPT system is suitable for high power applications and is superior in performance to its single-phase counterpart.I.

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“…2) Bidirectional energy transfer: Bidirectional WPT systems have been studied in both single-phase and three-phase systems to improve the efficiency of energy feedback [13][14][15]. An interesting aspect of electric vehicles is the possibility of integrating the vehicle-to-grid (V2G) concept into the utility grid.…”

Section: Introductionmentioning

confidence: 99%

A bidirectional wireless power transfer system for an electric vehicle with a relay circuit

Xia¹,

Wang²,

Liu³

et al. 2017

Turk J Elec Eng & Comp Sci

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Abstract:In order to extend the transfer distance, enhance the tolerance for coil misalignment, and improve the capability of energy feedback and power transfer efficiency of conventional wireless power transfer (WPT) systems for electric vehicles, this paper presents a bidirectional WPT topology with a relay circuit. In the proposed topology, the primary and pickup circuits are implemented with virtually identical structures, which can operate in both magnetic field excitation and magnetic field receiving modes to facilitate bidirectional power flow between the primary side and the pickup side. A relay circuit is introduced to achieve high transfer efficiency under special conditions such as long distance or coil misalignment. The mathematical model of the system is established to describe its working mechanism in detail. Both the direction and amount of power flow can be regulated by controlling the shift phase voltages generated by primary and pickup switches. At the same time, the power and efficiency of system are analyzed, which provides a reference to optimize the parameters. The viability of the proposed system is verified by experiments, and the results suggest that the relay bidirectional WPT system is a reliable and efficient system for electric vehicle charging systems.

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A two-way inductive power interface for single loads

Cited by 25 publications

References 14 publications

A Bidirectional Inductive Power Interface for Electric Vehicles in V2G Systems

A Bidirectional Inductive Power Interface for Electric Vehicles in V2G Systems

A three-phase bi-directional IPT system for contactless charging of electric vehicles

A bidirectional wireless power transfer system for an electric vehicle with a relay circuit

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