Analysis, Design, and Demonstration of a 25-kW Dynamic Wireless Charging System for Roadway Electric Vehicles

Tavakoli, Reza; Pantic, Zeljko

doi:10.1109/jestpe.2017.2761763

Cited by 232 publications

(75 citation statements)

References 30 publications

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“…Static Wireless Charging (SWC) systems transmit power over the air gap between two stationary positioned coils, while a Dynamic Wireless Charging (DWC) system potentially allows one to transfer power from a stationary transmitter to the receiver coil of a moving object, e.g., an EV [20][21][22][23]. In a study by Choi et al [2], one of the major challenges associated with commercialization of EVs is the battery durability.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…Such models can be obtained by dq-frame representation or dynamic phasorbased modeling [11]. Such modelling approaches have been studied for various IPT systems, for instance by [12], [13], [14], [15]. However, the following analysis will specifically address the nonlinearity of CVL characteristics and the offresonant operation according to Fig.…”

Section: Time-invariant State-space Modelling Of Ss Compensated mentioning

confidence: 99%

“…Additionally, the open loop transfer functions include the assumed PI-controller h r (s) and a low-pass filter h f (s) with time constant T f = 100/2πf 0 for extracting the average value of the single-phase power flow. The frequency characteristics of the two open loop transfer functions in (14) and (15) are shown for three different coupling conditions in Fig. 11 and Fig.…”

Section: B Power Controller Designmentioning

confidence: 99%

Small-Signal State-Space Analysis of Inductive Battery Charging System in Off-Resonant Operation

Torsgard¹,

Guidi

Suul³

2019

2019 20th Workshop on Control and Modeling for Power Electronics (COMPEL)

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This paper analyses the small-signal dynamics of a series-series compensated inductive charging system with a passive diode rectifier interfaced directly to a battery on the receiving side. The analyzed system is designed for utilizing the constant voltage load (CVL) characteristics of the battery to enable power flow control at constant input/output voltages by changing the frequency in response to variations in coupling conditions. A linearizable state-space model, including the nonlinear CVL characteristics, is presented and utilized to evaluate the smallsignal dynamics of the studied system. Eigenvalue trajectories and frequency characteristics are presented to show how the small-signal dynamics vary with the coupling conditions and how this will influence controller tuning requirements. Time-domain simulations are presented to verify the validity of the small-signal modelling and to demonstrate the performance of sub-resonant frequency control by a simple PI-controller regulating the power flow in response to variations in the coupling conditions.

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“…The advantage of the dynamic wireless supply technology makes the research and application of relevant technology very active. In [6], the design and demonstration of a 25 kW dynamic wireless power transfer system for EVs were presented. The work in [7] presented the experimental study and analysis of the Inductor-Capacitor-Inductor (LCL)-LCL compensation network-based WPT system for EV.…”

Section: Introductionmentioning

confidence: 99%

Multi-Load Mode Analysis for Electric Vehicle Wireless Supply System

et al. 2018

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When electric vehicles (EVs) run on the wireless power supply coils, the multi-load working mode will appear, showing that that more than one EV is collecting energy from one coil. Aiming at the stability problem of multi-load mode, this paper mainly analyzes how the number of loads influences the system stability and defines the boundary condition of the load quantity. Meanwhile, an L-shaped coil structure and the T-shaped magnetic core structure are proposed to solve the problem of coil breakdown for high-power supply situations. The proposed structures effectively reduce the supply coils’ self-inductance on the premise of guaranteeing the power transfer, and ensure the security of the multi-load system. At last, the validity of theoretical analysis is verified by simulations and experiments.

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Analysis, Design, and Demonstration of a 25-kW Dynamic Wireless Charging System for Roadway Electric Vehicles

Cited by 232 publications

References 30 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

Small-Signal State-Space Analysis of Inductive Battery Charging System in Off-Resonant Operation

Multi-Load Mode Analysis for Electric Vehicle Wireless Supply System

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