Abstract: High voltage DC generators based on a resonant tank include power inductors. As the demands on power output increase, but the demands on size of such high voltage DC generators decrease, the effect of radiated magnetic emissions become more significant. The present invention concerns a design for an inductive device, and a method for the assembly of an inductive device, in which a winding facing surface of the inductive device is a continuous portion, so that no air gap is present facing the winding facing surface. This reduces leakage of magnetic flux from the inductive device.

Abstract: The invention relates to a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The present invention relates to a ceramic substrate (100) comprising: a front side (100-1), which comprises: i) a power semiconductor (102-1, . . . , 102-n); and ii) a first metallic layer (104) comprising at least one first metallic plane contact (104-1, . . . , 104-n), which is configured to connect the power semiconductor (102-1, . . . , 102-n) to a first terminal (105-1, . . . , 105-n) on an edge (100-3) of the ceramic substrate (100); a back side (100-2), which comprises: i) a capacitor (103) which is attached to a ii) second metallic layer (108) comprising at least one second metallic plane contact (108-1, . . . , 108-n), which is configured to connect the capacitor (103) to a second terminal (107-1, . . . , 107-n) on the edge (100-3) of the ceramic substrate (100); and a metallic frame (110), which is configured to connect the first metallic layer (104) to the second metallic layer (108).

Abstract: The present invention relates to a device (1) for controlling a power converter (100), the device (1) comprising: a sensor module (10), which is configured to measure an inductor current (i_L) through an inductor of the power converter (100); a compensation module (20), which is configured to generate a compensation waveform (i_c); and an operating module (30), which is configured to provide a continuous conduction mode current signal (i_CCM) based on the compensation waveform (i_c) and of the inductor current (i_L) and which is configured to control the power converter (100) based on the provided continuous conduction mode current signal (i_CCM).

Abstract: The present invention relates to a device (1) for estimating an average value of an inductor current for switched-mode power converters (100), the device (1) comprising: a sensor (10), which is configured to measure an inductor voltage (v_L) and an inductor current (i_L); a ripple-suppressor (20), which is configured to provide an estimated inductor current ripple (EIR) based on the measured inductor voltage (v_L); and a current-corrector (30), which is configured to provide a corrected inductor current (i_Lc) based on the estimated inductor current ripple (EIR) and the measured inductor current (i_L).

Abstract: Power supplies for supplying medical systems in hospitals must be designed to accommodate a demanding range of requirements. The instantaneous power demand from modern CT systems can reach hundreds of kilo Watts. Dimensioning a hospital utility power system to provide this instantaneous power level is expensive. The usage pattern of medical systems in hospitals means that the instantaneous power is required only for a low duty cycle, with an average power demand of such a system being at least one order of magnitude lower. Therefore, the present application proposes a multifunctional power distribution system, with a charging mode, an operation mode, a backup mode, and a bypass mode. In the operating mode, the average power level may be supplied from the utility mains, but the relatively infrequent peak power demands may be provided from an electrical energy storage element, which is charged by the utility mains supply.

Abstract: Pre-conditioners (or line-conditioners) are used to convert electrical power having first characteristics into electrical power having second characteristics. For example, a pre-conditioner may connect electrical equipment forming a load, which requiring only a conventional mains supply level to a utility three-phase supply. This means that the power components of the load may be de-rated, making the load electrical equipment cheaper. Such circuits may be further improved. Components in the down-converter itself still need to be rated to interface with the higher voltage. An approach is proposed in which two interleaved down-converters (36, 38) can be used to supply voltages. An energy recovery element (50) connects snubbers of the interleaved down-converters, thus enabling some de-rating of the pre-conditioner circuitry.

Abstract: The present invention relates to a converter circuit (1) for reducing a nominal capacitor voltage, the converter circuit (1) comprising: an input node (TI1), which is configured to receive an input voltage (VG); an output node (TO1; TO2), which is configured to supply an output voltage (VO) to a load (RL1; RL2); and a capacitor (C1; C2), which is coupled to the load so that the input voltage is divided between the capacitor (C1; C2) and the load (RL1; RL2) and which is configured to be charged up to a voltage corresponding to a differential voltage between the input voltage (VG) and the output voltage (VO).

Abstract: The invention relates to a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The present invention relates an NPC switching device (10) for an X-ray system (86) with symmetric power supply, wherein the switching device is amended by extra damping resistors (13, 18) in the high voltage rails (24, 28). These resistors act as damping resistors. Thus, they may provide particular damping in combination with the load (100), which is capacitive dominated. Further, an additional inductor (77) may be provided at the output (48) of the NPC switching device allowing a resonant transition. In case the NPC switching device is connected with a grid capacitance of the X-ray system, comprising a cathode (90) and a grid (92), wherein the cathode and the grid form a grid capacitance, overshoot and settling time in the switching device may be controlled and reduced, in particular to a minimum.

Abstract: A high voltage transformer (50) includes a magnetic core (5); a low voltage winding (10); a high voltage winding (20); at least one inner sleeve (30); and a coil bobbin (24) for carrying the high voltage winding (20). The coil bobbin (24) is configured to be arranged inside the at least one inner sleeve (30) and configured to be attached to the at least one inner sleeve (30) at an outer perimeter of the at least one inner sleeve (30). The coil bobbin (24) includes at least one field-control electrode (22), which is adapted to shape an electric field generated by the high voltage winding (20).

Abstract: The present invention relates to a device (1) for controlling a power converter (100), the device (1) comprising: a sensor module (10), which is configured to measure an inductor current (i_L) through an inductor of the power converter (100); a compensation module (20), which is configured to generate a compensation waveform (i_c); and an operating module (30), which is configured to provide a continuous conduction mode current signal (i_CCM) based on the compensation waveform (i_c) and of the inductor current (i_L) and which is configured to control the power converter (100) based on the provided continuous conduction mode current signal (i_CCM).

Abstract: The present invention relates to a converter circuit (1) for reducing a nominal capacitor voltage, the converter circuit (1) comprising: an input node (TI1), which is configured to receive an input voltage (VG); an output node (TO1; TO2), which is configured to supply an output voltage (VO) to a load (RL1; RL2); and a capacitor (C1; C2), which is coupled to the load so that the input voltage is divided between the capacitor (C1; C2) and the load (RL1; RL2) and which is configured to be charged up to a voltage corresponding to a differential voltage between the input voltage (VG) and the output voltage (VO).

Abstract: Described is a management unit (1) and a method for operating such a unit in a Power-over-Ethernet (PoE) installation. The management unit (1) comprises at least one first port (12a) to which an external device (2) can be connected, and it is adapted to control the power delivered at a first port (12a) in dependence on predetermined switching rules.

Abstract: The present invention relates to a control device (1) for a multiple-input multiple-output converter (100) comprising: a first transformation block controller (21), which is configured to split outputs of the multiple-input multiple-output converter (100) into independent sets of outputs representing at least two independent virtual converters (100-1, 100-2, . . . , 100-n); a first converter controller (10), which is configured to control a first virtual converter (100-1) of the at least two independent virtual converters (100-1, 100-2, . . . , 100-n) by providing a first controlling signal based on the independent sets of outputs; a second converter controller (30), which is configured to control a second virtual converter (100-2) of the at least two independent virtual converters (100-1, 100-2, . . .

Abstract: The present invention relates to a device (1) for estimating an average value of an inductor current for switched-mode power converters (100), the device (1) comprising: a sensor (10), which is configured to measure an inductor voltage (v_L) and an inductor current (i_L); a ripple-suppressor (20), which is configured to provide an estimated inductor current ripple (EIR) based on the measured inductor voltage (v_L); and a current-corrector (30), which is configured to provide a corrected inductor current (i_Lc) based on the estimated inductor current ripple (EIR) and the measured inductor current (i_L).

Abstract: Pre-conditioners (or line-conditioners) are used to convert electrical power having first characteristics into electrical power having second characteristics. For example, a pre-conditioner may connect electrical equipment forming a load, which requiring only a conventional mains supply level to a utility three-phase supply. This means that the power components of the load may be de-rated, making the load electrical equipment cheaper. Such circuits may be further improved. Components in the down-converter itself still need to be rated to interface with the higher voltage. An approach is proposed in which two interleaved down-converters (36, 38) can be used to supply voltages. An energy recovery element (50) connects snubbers of the interleaved down-converters, thus enabling some de-rating of the pre-conditioner circuitry.

Abstract: A Power-over-Ethernet (PoE) device for use in a PoE system is described. The PoE device comprising a first PoE port for connecting the device to an upstream PoE device or a central control unit, a second PoE port for connecting the device to a downstream device or PoE device and a control unit for controlling data and/or power communication between the first and second PoE port. The control unit further comprises a first power input terminal connected to the first PoE port to receive electrical power for powering the control unit.

Abstract: The invention is directed to a voltage rectifier (23) comprising at least two diode arrays (33, 34, 35, 36) each comprising plural diodes (33a, 33b, 33p, 34a, 34b, 35a, 35b, 35p, 36a, 36b, 36c, 36d, 36p) connected in series. The diode arrays are arranged in an enclosure (47). The diode arrays are arranged in a special arrangement for providing an even distribution of a field strength. According to an embodiment and with respect to the figures, the vertical distance between an enclosure (47) and the diode arrays (33, 34, 35, 36) increases when horizontally distancing from the direct current terminals. Further, the invention provides a voltage generator (21) and a voltage rectifier (23) having such a voltage rectifier.

Abstract: The present invention relates to a ceramic substrate (100) comprising: a front side (100-1), which comprises: i) a power semiconductor (102-1, . . . , 102-n); and ii) a first metallic layer (104) comprising at least one first metallic plane contact (104-1, . . . , 104-n), which is configured to connect the power semiconductor (102-1, . . . , 102-n) to a first terminal (105-1, . . . , 105-n) on an edge (100-3) of the ceramic substrate (100); a back side (100-2), which comprises: i) a capacitor (103) which is attached to a ii) second metallic layer (108) comprising at least one second metallic plane contact (108-1, . . . , 108-n), which is configured to connect the capacitor (103) to a second terminal (107-1, . . . , 107-n) on the edge (100-3) of the ceramic substrate (100); and a metallic frame (110), which is configured to connect the first metallic layer (104) to the second metallic layer (108).