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Patent Searching and Data

Document Type and Number:
Japanese Patent JP2006527979
Kind Code:
There is provided a switching circuit ( 50 ) comprising: a transformer (TR 1 ) including at least one winding (P 1 , S 1 , S 2 ); a switching device (FET 1 ) coupled between a source of power ( 60 ) and the transformer (TR), the switching device (FETI) being coupled to a driving circuits ( 100 ) for periodically driving the switching devices (FET 1 ) into conduction to transfer power from the source ( 60 ) to the inductive component (TRi). The circuit ( 50 ) further includes: a first monitoring arrangement ( 115 ) for determining a measure of a magnetizing current present in the transformer (TR 1 ); a second monitoring arrangement for deriving a measure of hard switching occurring in the switching devices (FETI); and a signal processing arrangement ( 140, 150, 160, 170, 175 ) for generating a measure of reflected power being transferred through the transformer (TRI) from the measure of the magnetizing current and the measure of hard switching.

Halberstatt Johann Sea
Application Number:
Publication Date:
December 07, 2006
Filing Date:
June 16, 2004
Export Citation:
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Koninklijke Philips Electronics N.V.
International Classes:
H02M3/28; H02M3/335; H02M3/158
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen