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1. (WO2018050240) WIRELESS POWER TRANSMITTER, WIRELESS POWER TRANSMISSION SYSTEM AND METHOD FOR DRIVING A WIRELESS POWER TRANSMISSION SYSTEM

Pub. No.:    WO/2018/050240    International Application No.:    PCT/EP2016/071979
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Sat Sep 17 01:59:59 CEST 2016
IPC: H02J 50/12
Applicants: EPCOS SCHWEIZ GMBH
Inventors: HEMPHILL, Hugh
LOHMANN, Thomas
Title: WIRELESS POWER TRANSMITTER, WIRELESS POWER TRANSMISSION SYSTEM AND METHOD FOR DRIVING A WIRELESS POWER TRANSMISSION SYSTEM
Abstract:
A wireless power transmitter, a corresponding power transmission system and a method for driving such a system are provided. The power transmitter allows a high transmission efficiency and maintains an allowed operation frequency. Therefore, the transmitter comprises two transmission coils (TC1, TC2), a switch circuit (SWC) and an impedance circuit (CE1, CE2). The active transmission coil and the impedance circuit establish a resonance circuit, the resonance frequency of which can be adjusted via the switch circuit.