The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2021
Filed:
Nov. 06, 2017
Koninklijke Philips N.v., Eindhoven, NL;
Wilhelmus Gerardus Maria Ettes, Leeuwarden, NL;
Antonius Adriaan Maria Staring, Eindhoven, NL;
Lennaert Quirijn Bronts, Tricht, NL;
Eddy Gerrit Veltman, Steenbergen, NL;
Andries Van Wageningen, Wijlre, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A power transmitter () for a wireless power transfer system includes a parallel resonance circuit () comprising at a transmitter coil () for generating the power transfer signal. A power source () has a current sink terminal and a power source terminal providing current to the parallel resonance circuit () with a limited rate of change of the current drawn. A first switch element () is coupled between a first end of the parallel resonance circuit () and the current sink terminal. A second switch element () is coupled between the other end and the current sink terminal. A driver () generates a cyclic drive signal such that each cycle comprises a two time intervals in which one switch element () is closed and the other () is open; and a third time interval in which both the first switch element () and the second switch element () are closed, the third time interval being between the other two intervals.