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1. (WO2018203220) METHOD FOR CONTROLLING A CHARGING DEVICE AND CHARGING DEVICE

Pub. No.:    WO/2018/203220    International Application No.:    PCT/IB2018/052992
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Tue May 01 01:59:59 CEST 2018
IPC: H02J 50/10
H02J 50/90
Applicants: BRAUN GMBH
Inventors: KLEMM, Torsten
JUNG, Philipp
HERMANN, Ferdinand
GUEBLER, René
MEYER, Sebastian
Title: METHOD FOR CONTROLLING A CHARGING DEVICE AND CHARGING DEVICE
Abstract:
A method for controlling a charging device (10) and a respective charging device (10) transferring energy to an electrical load of an inductively coupled household appliance (20) are described, the circuitry of said charging device (10) comprising - an oscillator circuit (1) having at least one output power coil element (2, LI) and one capacitor element (CI, C2); an electrical power source; - a power switching element (7, Tl) feeding the oscillator circuit with electrical power; - a sensor element (6) for determining an electrical signal value indicative of the inductance of the oscillator circuit (1); - a microprocessor (4, uC) configured to adapt the electrical energy provided by the oscillator circuit dependent on a comparison of the measured electrical signal with a threshold. The method further comprises the following steps: activating a threshold determining mode of the microprocessor (4, uC) starting upon the proximate powering up of the microprocessor; and - in the threshold determining mode of the microprocessor (4, uC), determining the threshold automatically after the proximate powering up of the microprocessor (4, uC).