Patent ID: 6897756
Filing Date: 2005-05-24
Classification: H02J

Abstract:
1. Apparatus having a first component ( 16 ), a second component ( 18 ), both components ( 16 , 18 ) being movable relative to each other, and a device for simultaneous transfer of electric power and information between said components ( 16 , 18 ) through contact-free, inductive coupling, wherein said device comprises a common transfer means for transfer of the power and the information and having a primary coil arrangement ( 1 ) mounted on said first component ( 16 ) and a secondary coil arrangement ( 2 , 27 ) mounted on said second component ( 18 ), a power supply being connected to said primary coil arrangement ( 1 , 24 ), being based on pulse width modulation and being operated at a predetermined clock frequency and with a predetermined duty cycle, and modifying means ( 71 , 72 or 10 , 115 to 119 ) for modifying of signals generated by said power supply in dependence of said information to be transferred.