The state-of-the-arts of wireless electric vehicle charging via magnetic resonance: principles, standards and core technologies

A Comprehensive State-of-the-Art Review of Wired/Wireless Charging Technologies for Battery Electric Vehicles: Classification/Common Topologies/Future Research Issues

“…The available wireless charging technologies are nearfield charging (i.e., inductive charging [44] [54], magneticresonant charging [55] [60], and capacitive charging [61] [65]) and medium-field charging (i.e., magnetic-gear charging) [66], [70]. However, far-field charging technologies (i.e., laser charging [71][77], microwave charging [78] [83], and radio wave charging [84] [89]) are still the subject of extensive research and are expected to represent the future trend in wireless charging technologies…”

“…The near-field charging technologies for BEVs include inductive charging [44] [54], magnetic-resonant charging [55] [60], and capacitive charging [61] [65], which are described in detail below. wherein power is transferred in the form of an electromagnetic field from a transmitter pad to a receiver pad, as shown in Fig.…”

“…In contrast to inductive charging, MR charging [55] [60] shown in Fig. 8, is very effective because the resonant frequency can be magnified by adding compensation capacitors, thereby resulting in a long transmission distance capability (i.e., 1 ~ 5 m).…”

“…8, is very effective because the resonant frequency can be magnified by adding compensation capacitors, thereby resulting in a long transmission distance capability (i.e., 1 ~ 5 m). The range of the power delivery achieved by MR charging can reach up to 100 kW [55] [60]. These forms of charging technologies can be implemented in four phases as follows: phase 1, simple residential systems; phase 2, parking areas; phase 3, on-street parking; and phase 4, dynamic charging systems (future technology for highways) [55], [56].…”

Energy Efficiency Analysis through Misalignment on New Design of Hexagonal Coil Array in Wireless Power Transfer

“…Power transfer applications demand has significantly increased especially in high power. Basically, the required power level must be handled well by converters to transmit power between primary and secondary sides [4], [5]. The problem is that the semiconductor device limitations limit the latest WPT system [6].…”