Abstract: An end effector (60) comprises a base (63), a first gripper (64) connected with the base (63) so as to swivel around a gripper axis (68), and a positioning element (66) which is guided on the base displaceably along an end effector axis (76) and interacts with the gripper (64) via a guide slot system. The gripper axis (68) extends outside of a guide slot (70) of the guide slot system.

Abstract: An insulated gate power semiconductor device has an (n?) doped drift layer between an emitter side and a collector side. A trench gate electrode has a trench bottom and trench lateral sides and extends to a trench depth. A p doped first protection pillow covers the trench bottom. An n doped second protection pillow encircles the trench gate electrode at its trench lateral sides. The second protection pillow has a maximum doping concentration in a first depth, which is at least half the trench depth, wherein a doping concentration of the second protection pillow decreases towards the emitter side from the maximum doping concentration to a value of not more than half the maximum doping concentration. An n doped enhancement layer has a maximum doping concentration in a second depth, which is lower than the first depth, wherein the doping concentration has a local doping concentration minimum between the second depth and the first depth.

Abstract: The present disclosure describes a two-stage method for estimating an angle offset of an angle sensor in a system comprising a permanent-magnet synchronous motor. An initial value for the estimated angle offset is first determined with a short circuit test. Next, a torque of the motor may be controlled so that the motor is maintained at a zero speed. Minor adjustments are made to the value of the angle offset to find a minimum magnitude of stator current. A value at which the stator current is at its minimum is used as a final angle offset.

Abstract: An electronic system includes a rack assembly including a first rail and a second rail defining a first width therebetween and a chassis that supports electronic components and is insertable between the first rail and the second rail. The chassis includes a first side and a second side defining a second width therebetween that is less than the first width. The electronic system further includes a power connector coupled to the chassis and movable between a first position and a second position. The power connector and the second side define a third width when the power connector is in the first position. The power connector and the second side define a fourth width when the power connector is in the second position. The third width is greater than the first width and the fourth width is less than the first width.

Abstract: A method of determining phasor components of a periodic waveform, wherein the method includes: a) sampling the periodic waveform, b) determining a frequency spectrum of the sampled periodic waveform by means of a frequency transform utilizing a Gaussian window function, wherein a ratio np defined by the duration of the sampling of the periodic waveform divided by the width parameter of the Gaussian window function is at least 5, c) selecting a region of the frequency spectrum containing a frequency peak defined by a group of consecutive frequency bins each being defined by a frequency value and a magnitude value, and d) determining phasor components of the periodic waveform based on the group of consecutive frequency bins.

Abstract: The invention concerns a switchyard for interconnecting direct current power networks and a direct current power transmission system comprising such a switchyard. The switchyard comprises a number of interconnected entities comprising at least two main circuit breakers and a number of transfer switches, where each network has two connections to the switchyard, at least one via a transfer switch, each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker and at least one via a transfer switch, and each network is joined with every other network via a corresponding path through at least one main circuit breaker as well as via a corresponding path bypassing all main circuit breakers.

Abstract: A method and an apparatus for fault detection in a mixed configuration power transmission line including a plurality of sections arranged between one end of the transmission line and the other end of the transmission line and including at least one overhead line section and at least one cable section are disclosed. Based on a comparison travelling wave voltage or current time derivatives at the one end and the other end of the power transmission line with selected threshold values, it is determined if there is a fault occurring in at least one cable section of the power transmission line. Embodiments utilize amplification of travelling wave voltages and/or currents which may occur at junctions between a cable section and an adjacent overhead line section in determining if the fault occurs in a cable section of the power transmission line.

Abstract: A circuit breaker system has an SF6 tank having a wall, and an SF6 heating system. The SF6 heating system includes a heater disposed externally of the tank, and a radiator disposed on the wall inside the SF6 tank. The radiator is thermally coupled to the heater via the wall. The heating system is constructed to conduct heat from the heater through the wall to the radiator. The radiator is constructed to radiate the heat to the SF6 in the tank. A circuit breaker system has an SF6 tank having a wall, and a particle trap. The particle trap has a spar extending radially inward from the wall and a wing extending outward from each side of the spar. Each wing is spaced apart from the wall and forms a region having no electric field at the bottom of the tank adjacent the spar.

Abstract: It is the object of the invention to provide a power semiconductor rectifier with a low on-state-voltage and high blocking capability. The object is attained by a power semiconductor rectifier comprising: a drift layer having a first conductivity type; and an electrode layer forming a Schottky contact with the drift layer, wherein the drift layer includes a base layer having a peak net doping concentration, below 1·1016 cm?3 and a barrier modulation layer which is in direct contact with the electrode layer to form at least a part of the Schottky contact, wherein a net doping concentration of the barrier modulation layer is in a range between 1·1016cm?3 and 1·1019 cm?3 and wherein the barrier modulation layer has a layer thickness in a direction vertical to the interface between the electrode layer and the barrier modulation, layer of at least 1 nm and less than 0.2 ?m.

Abstract: A computerized platform for monitoring the operation of an electric power distribution grid which includes in one form an accessory device operatively coupled with or comprised in an electronic protection relay of said electric power distribution grid, wherein said accessory device is configured to gather grid data and to transmit said grid data through the Internet; a publishing computerized unit capable of communicating with said accessory device through the Internet, said publishing computerized unit being configured to interact with said accessory device to acquire and store said grid data; an interface computerized unit capable of communicating with said accessory device and said publishing computerized unit through the Internet, said interface computerized unit being configured to provide interface services to manage the interaction of said accessory device with said publishing computerized unit.

Abstract: A method and a system for reproducing a calibration certificate of an electronic instrument having at least one electronic storage means, the method involving separating the calibration certificate data into a first subset of data, which is calibration specific, and a second subset of data, which is document descriptive; defining a set of meta data about the second subset of data; storing the first subset of data and the set of meta data in the instrument's electronic storage means; storing the second subset of data in a computing device separated from the electronic instrument; and reproducing the calibration certificate by uploading the first subset of data and the set of meta data to the computing device and reconstructing the calibration certificate from the uploaded first subset of data set of meta data and the second subset of data.

Abstract: A multi-phase electric drive includes a multi-phase power transformer, including a primary winding and a first number of secondary windings, said primary winding being electrically connectable to a source of multi-phase AC power; a first number of power units, each of said first number of power units having input connected with a corresponding one of said first number of secondary windings, and a multiple of said first number of power units being serially connected with respective others of said power units in each phase output line connectable to a multi-phase AC load; at least one measurement device, being electrically connected with said input to at least one of said first number of power units and being adapted for measuring an electrical quantity at the input thereto; and a control system, being adapted for detecting a fault based on a value for the measured electrical quantity.

Abstract: A DC/AC converter is provided with a new control device and method for managing inrush current transients during operation without requiring additional external devices or emergency operating modes forcing the DC/AC converter to shut down. The present invention is particularly, but not exclusively, aimed at grid connected DC/AC, converters, often subject to inrush current phenomena due to perturbations in the grid.

Abstract: Disclosed is a wiring unit having a main portion of a flexible printed circuit (FPC) board therein. Said rotary joint further comprises a protective unit fixed to said wiring unit, in which an end portion of said FPC board is connected to a group of cables. Also disclosed is a robot comprising said rotary joint. Compared with the existing prior arts, the proposed solutions prevent the damage of FPC during assembly and/or disassembly of robots, while not losing compactness.