Highly Efficient Contactless Electrical Energy Transmission System.

Frequency selection of an inductive contactless power transmission system for ocean observing

“…The power transfer of several kilowatts is possible from a single pick-up winding, and multiple pick-ups can be powered from the same track. Ayano et al (2004) adopted a high-frequency inverter using a soft switching method to miniaturise the size of the couplers. The system has a coupling rate of 0.88 for a transformer gap length of 10 mm with 91% efficiency.…”

Electrical Motor Drivelines in Commercial All-Electric Vehicles: A Review

“…Contactless electric transmission has an expected efficiency above 90% [90], [91], which is higher than batteries. Highways equipped with power transfer systems would allow EVs with lower battery ratings designed for short commuting distance to have an infinite range at a relatively low cost.…”

Comprehensive Topological Analysis of Conductive and Inductive Charging Solutions for Plug-In Electric Vehicles

“…The aforementioned losses are greatly influenced by the core size, increasing when the transformer is scaled up. Symmetrically dividing the secondary winding and assembling the core in a piecewise manner using ferrite materials are reported as possible solutions [46]. A 2.5-kW, 100-kHz, 91% efficiency IPT system is presented in [46].…”

“…Symmetrically dividing the secondary winding and assembling the core in a piecewise manner using ferrite materials are reported as possible solutions [46]. A 2.5-kW, 100-kHz, 91% efficiency IPT system is presented in [46]. It has been reported that a C-I transformer has higher coupling of 0.88 in comparison with a U-U transformer, which has 0.5 coupling.…”