Modelling of a 100 kW-85 kHz Three-Phase System for Static Wireless Charging and Comparison with a Classical Single-Phase System

100 kW Three-Phase Wireless Charger for EV: Experimental Validation Adopting Opposition Method

“…The resulting geometry is a circular pad with the aim to minimize the mutual magnetic coupling between two adjacent phases. Hence, compared to already proposed systems [27,28], the structure consists of the overlapping of every single coil with the next one [8]. The TPP coils, briefly described before, are manufactured in litz wire due to the highfrequency currents circulating in the phases.…”

“…In the characteristic matrix in (1) also the crossing coupling terms, from the transmitter to receiver can be neglected because of the overlapping described above [8] at least in perfect alignment. As a result, the matrix in (1) consists only of the self-inductances of the coils (L A , L B , L C , L a , L b , L c ) and the mutual coupling terms of the three equivalent single-phase systems (M Aa , M Bb , M Cc , M aA , M bB , M cC ).…”

“…Thus, the modulation indexes have the sequent range of regulation: 0 m H 1 and −1 m L 0. Speaking about the three-phase boost converter it must be specified that, in contrast to the WPT inverter, the command is driven by the modulation depth (8). Obtained from the comparison between the carrier amplitude A tr and the modulation amplitude given by (7)…”

“…Most WPT systems already studied in the literature present single-phase structure [4,5]. However, if the WPT systems increase power, the possibility to switch to polyphase structures must be taken into consideration thanks to a uniform distribution of electromagnetic field and the lower heating losses at the same working condition of single-phase structures [6][7][8].…”

“…This paper presents a WPT ultrafast charger for a light-duty vehicle, directly supplied by the power grid of an urban tramway substation. This system consists of a TriPolar-Pad (TPP) structure that stems from the structure proposed in [8], a three-phase SiC-based inverter, at the transmitter side, and a three-phase Si-based diode bridge at the receiver side. The system with this configuration has the purpose of improving power density and specific power transfer for EVs battery charging applications.…”