Abstract:
The invention relates to a transformer (21). In order to limit the height of the transformer (21), it comprises a planar primary winding (30) and a plurality of planar secondary windings (33). Each secondary winding (33) provides an isolated output (34, 35). The secondary windings (33) are arranged side by side in a plane parallel to the primary winding (30) such that a portion of a magnetic flux generated by the primary winding (30) penetrates each of the secondary windings (33). The invention relates equally to an apparatus (10, 15) comprising such a transformer (21) and to a method of producing such a transformer (21).
Abstract:
The invention relates to a light emitting device (1) with an electronic driver (10) and a planar light emitting element (20), wherein the driver (10) is connected with a source (2) and the light emitting element (20), wherein the light emitting element (20) having an internal capacitance (21) is connected to said driver (10) in such a way that the internal capacitance (21) serves as a passive output filter of the driver (10).
Abstract:
The system (1) according to the invention comprises an energizable load (2) and an inductive powering device (9) as well as a permanent magnet (8) arranged on the conductor (4) for interacting with the further conductor (9a) for aligning the inductor winding (6) with respect to the further inductor winding (9b). The energizable load (2) for enabling the inductive power receipt comprises a wiring (6) which cooperates with the conductor (4) for forming a secondary wiring of the transformer. In order to form the system for inductive energy transfer, the energizable load (2) is to be placed on the inductive powering device (9), whereby the surface (2a) will contact the surface (7). The inductive powering device (9) comprises a further magnetizable conductor (9a) provided with a further winding (9b), thus forming a primary wiring of the split-core electric transformer. When the winding (6) is brought in the vicinity of the further winding (9b), the magnetic force acting on the further magnetizable conductor (9a) provides for instant proper mutual alignment of the winding (6) and further winding (9b). The invention further relates to an inductive powering device, an inductive load and a method of enabling an inductive energy transfer to an energizable load.
Abstract:
SMT-components known in the art usually have a thickness of approximately 1 mm and no flexibility. According to the present invention windings for an inductor are realized within a substrate, preferably by using copper layers which are already in the substrate. Then, thin metal sheet layers of high permeable material are laminated on top and bottom of the substrate. These layers are structured and then form the magnetic core of the inductor. Advantageously, an inductor may be provided with a very small building height.