Abstract: The present invention relates to a control circuit (10) for controlling a resonant power converter. It is described to generate (210) a modulation signal. A carrier signal is generates (220), wherein the generation of the carrier signal comprises measuring at least one signal from the power converter. A switching signal is generated (230) that is useable to control a value of at least one magnitude of the resonant power converter based on the modulation signal and the carrier signal.

Abstract: The present invention relates to a control circuit (10) for controlling a resonant power converter. It is described to generate (210) a modulation signal. A carrier signal is generates (220), wherein the generation of the carrier signal comprises measuring at least one signal from the power converter. A switching signal is generated (230) that is useable to control a value of at least one magnitude of the resonant power converter based on the modulation signal and the carrier signal.

Abstract: An X-ray source arrangement (10) for generating X-ray radiation (102), a method for operating the X-ray source arrangement (10), and an X-ray imaging apparatus (100) are provided. The X-ray source arrangement (10) comprises an X-ray tube (22), a converter arrangement (16) with an inverter (18) and a resonant converter (20) for providing a source voltage to the X-ray tube (22), a pre-controller (12), and a modulator (14). The pre-controller (12) is configured for determining a reference duty ratio (r, 26) of the resonant converter (20) as a continuous function of time based on a mathematical model of the resonant converter (20), and for providing a control signal (13) correlating with the reference duty ratio (r, 26) to the modulator (14). The modulator (14) is configured for determining a switching signal (15) based on the control signal (13), and for providing the switching signal (15) to the inverter (18) of the converter arrangement (16) for actuating the inverter (18).

Abstract: The present invention relates to an inductor (10) for high frequency and high power applications. The inductor (10) comprises at least one wire conductor (20), and a coil zone (30). Windings of the at least one wire conductor comprises the at least one wire conductor being wound around the coil zone to form a substantially torus shape centred around an axis extending in an axial direction of the torus shape. At an outer extent of the coil zone, outer windings of the at least one wire conductor are substantially at a first radial distance from the axis. At an inner extent of the coil zone, inner windings of the at least one wire conductor are substantially at a second radial distance from the axis and substantially at a third radial distance from the axis respectively. When an inner winding of the at least one conductor is at the second radial distance the next inner winding of the at least one conductor is at the third radial distance.

Abstract: The present invention relates to an inductor (10) for high frequency and high power applications. The inductor (10) comprises at least one wire conductor (20), and a coil zone (30). Windings of the at least one wire conductor comprises the at least one wire conductor being wound around the coil zone to form a substantially torus shape centred around an axis extending in an axial direction of the torus shape. At an outer extent of the coil zone, outer windings of the at least one wire conductor are substantially at a first radial distance from the axis. At an inner extent of the coil zone, inner windings of the at least one wire conductor are substantially at a second radial distance from the axis and substantially at a third radial distance from the axis respectively. When an inner winding of the at least one conductor is at the second radial distance the next inner winding of the at least one conductor is at the third radial distance.

Abstract: An X-ray source arrangement (10) for generating X-ray radiation (102), a method for operating the X-ray source arrangement (10), and an X-ray imaging apparatus (100) are provided. The X-ray source arrangement (10) comprises an X-ray tube (22), a converter arrangement (16) with an inverter (18) and a resonant converter (20) for providing a source voltage to the X-ray tube (22), a pre-controller (12), and a modulator (14). The pre-controller (12) is configured for determining a reference duty ratio (r, 26) of the resonant converter (20) as a continuous function of time based on a mathematical model of the resonant converter (20), and for providing a control signal (13) correlating with the reference duty ratio (r, 26) to the modulator (14). The modulator (14) is configured for determining a switching signal (15) based on the control signal (13), and for providing the switching signal (15) to the inverter (18) of the converter arrangement (16) for actuating the inverter (18).

Abstract: An electrical inverter 18 for transforming an DC current into an AC current comprises at least one half-bridge 54. The half bridge 54 comprises at least two series connected semiconductor switches 58a, 58b, 58c, 58d inter-connecting an input terminal 54, 56 with an output terminal 50 of the inverter 18. A snubber capacitor 62a, 62b is connected in parallel to at least two semiconductor switches 58a, 58b, 58c, 58d of the half bridge 54.

Abstract: An electrical energy supply system (12) comprises an input rectifier (14) for rectifying an input voltage into a DC voltage, an inverter (18) with semiconductor switches for generating an AC output voltage from the DC voltage and a controller (24) for switching the switches of the inverter (18). The inverter (18) is adapted for generating a 5-level AC output voltage. The controller (18) is adapted to switch the semiconductor switches such that an asymmetric pulse shape is generated from the inverter (18) in a half cycle of the AC output voltage.