A Dynamic EV Charging System for Slow Moving Traffic Applications

Abstract

Inductive Power Transfer (IPT) is by far the most popular method to transfer energy wirelessly and has attracted considerable attention in recent times. The Wireless Power Consortium (WPC) has developed a standard (Qi) for low power consumer electronics, whereas, the Society of Automotive Engineers (SAE) is working on a standard (J2954) to charge Electric Vehicles (EVs) wirelessly. SAE's current efforts are only focused on transferring power to the vehicles at rest (static), whereas no work has been done so far on developing the standards for transferring power to the vehicles on the move (dynamic). This paper presents the magnetic design of an IPT system for a dynamic EV charging application, to continuously deliver a power of 15kW to an EV, along the direction of travel within the lateral misalignment of ±200mm. The experimental validation of system operation, however, was conducted at 5kW. The design aims at distributing the cost and complexity of the system between the primary and secondary side, while achieving a smooth power transfer profile. In addition, the system is designed to exploit the shielding effect provided by the vehicle, as the field generating components of the system are covered by the vehicle body under all operating conditions.

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

“…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.…”

“…Energies 2018, 11, 624 3 of 21 The efficiency of both IPT and CPT methods is high, but the range of power transfer is low. The IPT method is preferable for EV charging because of the high power transfer rate which can be transferred comparing to the CPT method.…”

Multiple receivers wireless power transfer systems using decoupling coils to eliminate cross-coupling and achieve selective target power distribution

“…Compared with the cable power transmission, the wireless power transmission (WPT) technology has aroused wide attention for its high efficiency, safety and reliability [1,2]. Nowadays, wireless power transmission technology has been broadly used in electric vehicles, consumer electronics as well as implantable medical devices [3,4,5,6].…”

“…The equivalent impedance of an impedance inverter IEICE Electronics Express, Vol 16,. No.18,[1][2][3][4][5][6] …”

LCL Topology Based Single Stage BoostRectifier Topology for Wireless EV Charging

“…Transport is a huge global industry. In order to gradually reduce and eliminate the carbon footprint from the Transport industry, Electric Vehicles (EVs) are being promoted as a viable, clean and safe alternative for transport [1].…”