Title :
2.4 kW prototype of on-road Wireless Power Transfer: Modelling concepts and practical implementation
Author :
A. Caillierez;P.-A. Gori;D. Sadarnac;A. Jaafari;S. Loudot
Author_Institution :
GeePs - Group of electrical engineering Paris, 3, 11 rue Joliot-Curie, Plateau du Moulon - 91192 Gif-sur-Yvette CEDEX, France
Abstract :
This article focuses on Wireless Power Transfer, adapted to a dynamic charging infrastructure. The authors present a high-efficiency 2.4 kW prototype of electric road, designed according to an analysis based on phasor diagrams to size the key-elements of the SS resonant converter. It involves 50-cm square coils, with an air-gap of 15 cm between the ground and the on-board sides, for an automotive application. The system uses a ZPA method control on both ground and on-board parts of the air-transformer, implemented with a varying-frequency inverter. The experimental results show a very steady and stable on-board voltage despite the evolutive magnetic coupling with the displacement of the load, from -18 cm to 18 cm. The efficiency measures presented in this article reach 91% and never falls below 70%. These data being measured with an emitted voltage of 30 V (half the operating voltage), the operating efficiency reaches even higher values. The efficiency is also very stable with displacement. Furthermore, the system has a very good dynamic response: the switch between one coil to the next during the motion of the load does not exceed 4 ms, and the adaptive response to a 280 W output power step lasts only 1.1 ms before the permanent regime.
Keywords :
"Coils","Roads","Vehicles","Voltage measurement","Inverters","Prototypes","Vehicle dynamics"
Conference_Titel :
Power Electronics and Applications (EPE´15 ECCE-Europe), 2015 17th European Conference on
DOI :
10.1109/EPE.2015.7311706