Abstract: Some embodiments are directed to charging system (100) comprising converter switches for electrically coupling to a first electrical energy storage device, a filter circuit comprising a series inductor and a parallel capacitor, a coupling device for coupling to a second electrical energy storage device comprising a detection device for detecting a connection status of the coupling device, switches arranged for selectively electrically coupling, when switched on, the filter circuit with an alternating current voltage source, and a controller, configured, based on the connection status of the coupling device, to switch on switches and control the converter switches such that the time periodical voltage signal and the current through the series inductor are in phase, or to switch off switches and control the converter switches for providing a current signal to the second electrical energy storage device.

Abstract: Some embodiments are directed to charging system comprising converter switches for electrically coupling to a first electrical energy storage device, a filter circuit comprising a series inductor and a parallel capacitor, a coupling device for coupling to a second electrical energy storage device comprising a detection device for detecting a connection status of the coupling device, switches arranged for selectively electrically coupling, when switched on, the filter circuit with an alternating current voltage source, and a controller, configured, based on the connection status of the coupling device, to switch on switches and control the converter switches such that the time periodical voltage signal and the current through the series inductor are in phase, or to switch off switches and control the converter switches for providing a current signal to the second electrical energy storage device.

Abstract: A resonant power converter (1) for driving an inductive load as, e.g. an inductively coupled gas-discharge lamp, is designed for operation at an operational frequency (Fop) of 13.56 MHz and comprises: a series arrangement of a first inductor (L1) and a first controllable switch (Q1) connected to a DC voltage source (DC);-a series arrangement of a second inductor (L2) and a second controllable switch (Q2) connected to said DC voltage source (DC); a first parallel capacitance (Cds1) associated with the first controllable switch (Q1); a second parallel capacitance (Cds2) associated with the second controllable switch (Q2); a controller (30) for driving the switches (Q1, Q2); the load is coupled between said nodes (A, B); the switches alternate between a conductive state and a non-conductive state at a duty cycle of 50%;-the switching frequency (Psw) is one-third of said operational frequency (Fop).

Abstract: The present invention provides proteins/genes, which are essential for survival, and consequently, for virulence of Streptococcus pneumoniae in vivo, and thus are ideal vaccine candidates for a vaccine preparation against pneumococcal infection. Further, also antibodies against said protein(s) are included in the invention.