Abstract: An electrical apparatus includes: a substrate on which circuit components of a power converter are mounted, and to which a power supply voltage is applied from an alternating-current power supply; a housing accommodating the substrate; a current detector; and a controller. The current detector detects a physical quantity correlated with a common mode current, the common mode current flowing to circulate through at least two of the alternating-current power supply, the substrate, and the housing by power generated by the power converter. The controller senses whether an electrical wire that is a ground wire is connected or not, on the basis of a value detected by the current detector.

Abstract: A test carrier carried in a state of accommodating a device under test (DUT) includes: a carrier body that holds the DUT; and a lid member that covers the DUT and is attached to the carrier body. The lid member includes: a plate-like main body; and a pusher protruding from the main body in a convex shape.

Abstract: An electric machine including at least one phase including two electrical paths in parallel, each electrical path of one and the same phase including a winding, the first electrical paths of all the phases being connected to one and the same first electrical node and the second electrical paths of all the phases being connected to one and the same second electrical node, the electric machine includes an equipotential wire electrically connecting the first and second electrical nodes and a current sensor configured to measure an electric current circulating in the equipotential wire.

Abstract: Disclosed are power distribution systems and methods in which a power distribution unit (PDU) includes a residual current monitor (RCM) to detect the presence of downstream leakage current in the PDU. The RCM can include a current sensor with a core that has power conductors passing through the core and drive windings about the core. Drive circuitry of the RCM produce alternating drive signals through the drive windings to drive the core into and out of positive and negative saturation. Sensing circuitry of the RCM produce a response signal that is filtered by a high-order current signal filter to isolate characteristics of the downstream leakage current.

Abstract: The following relates generally to optical voltage sensing, and in particular to optical voltage sensing of power grids and of a subject body. For example, some embodiments include an optical resonator comprising: (i) a top electrode layer, (ii) a piezoelectric layer, and (iii) a substrate. A light source may illuminate the optical resonator of the voltage sensor with light comprising an incident optical power at an input wavelength, where the input wavelength is offset from a resonant wavelength of the optical resonator by a baseline voltage. The applied voltage may then be measured by measuring a reflected or transmitted light power.

Abstract: In an example, a circuit includes an emulated current generator configured to provide an emulated current signal responsive to a charge current and a discharge current. The emulated current signal can be representative of an emulated current through an output inductor. A comparator is configured to provide a comparator signal responsive to the emulated current signal and sensed current signal representative of a measure of current through the output inductor. An inductor code counter is configured to adjust an inductor code count value responsive to the comparator signal. A slope of the emulated current signal can be adjusted responsive to the inductor code count value.

Abstract: The present disclosure provides techniques for predicting failure of power switches and taking action based on the predictions. In an example, a method can include controlling the at least two parallel-connected power switches via a first driver and a second driver, the first a second driver responsive to a single command signal, measuring a failure characteristic of a first power switch, and disabling a first driver of the first power switch when the first failure characteristic exceeds a failure precursor threshold.

Abstract: According to one embodiment, a semiconductor device includes a board, a plurality of external connection terminals, a semiconductor component, and an insulator. The board includes a first surface and a second surface. The second surface is located on a side opposite to the first surface. The plurality of external connection terminals is on the first surface. The semiconductor component is located on a side opposite to the plurality of external connection terminals with respect to the board. The insulator includes a first region and a second region. The first region has a first thickness in a thickness direction of the board. The second region is located on an outer peripheral side of the first region and has a second thickness thinner than the first thickness in the thickness direction. The insulator covers the semiconductor component from a side opposite to the board.

Abstract: A structure provides a defect sensor for a cavity in an integrated circuit (IC). The structure includes a cavity defined in a substrate. A boundary is located where the cavity meets with a cavity-free area of the substrate. A metal line is arranged in a serpentine path in both a vertical and a horizontal direction and crosses the boundary. A controller may be provided that is configured to, in response to a change in an electrical characteristic of a signal through the metal line, generate an indication of the presence of a defect and/or change operation of at least one component of the IC. The structure may find application relative to a photonics integrated circuit (PIC) structure including an optical waveguide with a cavity under the optical waveguide.

Abstract: A method for detecting a fault with a cable having a resistor divider couple to the cable. The method includes converting a first sense voltage from the resistor divider network to a first digital code, determining whether the first digital code falls within a first range of digital codes corresponding to a first fault associated with the cable, and responsive to determining that the first digital code falls within the first range of digital codes, generating an indication of the first fault.

Abstract: A system for detecting deposit formation on electrically-conductive materials in liquid and vapor phases includes a test cell for receiving a test liquid, for example. a lubricant, A heater heats the test liquid to generate a vapor phase of the test liquid in the test cell. A support frame supports at least a first set of electrical conductors in the test liquid, liquid phase, and at least a second set of electrical conductors in the vapor phase, each including a live and a neutral electrical conductor. A power source supplies electric current to the live electrical conductors. A sensor detects an electrical property in each set of conductors, which changes in response to formation of an electrically-conductive deposit connecting the first and second conductors in a respective set of conductors. Preferably, the electrical properties are detected by magnetic sensors such as Hall effect or eddy current sensors.

Abstract: A test carrier carried in a state of accommodating a device under test (DUT) includes: a carrier body that holds the DUT, and a lid member that covers the DUT and is attached to the carrier body. The carrier body has a first through-hole for positioning that is provided to face the DUT.

Abstract: A ground conductor monitoring device, having: at least one ground conductor connection which is designed to connect a ground conductor potential, at least one first potential connection which is designed to connect a first electrical potential which differs from the ground conductor potential, at least one second potential connection which is designed to connect a second electrical potential which differs from the first potential and the ground conductor potential, at least one electrical switching device which is designed to establish an electrical connection, optionally in accordance with an electrical control signal, between the first potential connection and the ground conductor connection (connection state) or to interrupt same (interruption state), at least one control unit which is designed to automatically output control signals to the electrical switching device.

Abstract: The present invention relates to a method for realizing the measuring slip of membrane probe, wherein: an elastomer layer is placed between the rigid acting surface of the membrane probe head and the membrane on which the probe is arranged; on the axial plane of the probe, the elastomer layer takes any axial line passing through the probe as a boundary line, and there is a difference between the thickness of one side and thickness of the other side, so that the probe can deflect during the test, resulting in the measuring slip to penetrate or push away the surface oxide of the tested chip and achieve more stable contact.

Abstract: A sensor system comprising: a deformable structure; a plurality of electrodes operably connectable to the deformable structure; an electrical conductor operably connected to the deformable structure and electrically couplable to each of the electrodes; a current source connectable to predetermined electrodes; a current injector for injecting current from the current source through predetermined electrodes; a voltage recorder for recording the voltage between predetermined pairs of electrodes; and an analyser for analysing voltage recordings to thereby determine the shape of the deformable structure.

Abstract: Collect a full band capture spectral reading from a plurality of cable/fiber broadband network customer units (e.g., cable modems or equivalent optical units); for each of the cable/fiber broadband network customer units, construct an ideal spectral reading. For each of the cable/fiber broadband network customer units, subtract the ideal spectral reading from the full band capture spectral reading to obtain a resultant spectrum. For at least one of the cable/fiber broadband network customer units, identify a persistent deviation from zero in the resultant spectrum that does not match a known impairment type. Identify at least one new impairment type corresponding to the persistent deviation from zero. Remediation of the new impairment type can be carried out as appropriate, and/or a detection pattern can be deployed to identify future occurrences of the new impairment type.

Abstract: A resistivity measuring tool used in a drillstring having a drill bit on a distal end for drilling a wellbore in a formation includes a tool body having a longitudinal axis, a transmitting antenna, and a receiving antenna. The receiving antenna includes an antenna body having a longer axis disposed longitudinally in the tool body, and a wire coil having a central axis disposed around the antenna body, wherein the wire coil central axis is substantially perpendicular to the longer axis of the antenna body, and wherein the wire coil is configured to generate a magnetic moment orthogonal to the tool body longitudinal axis. The transmitting antenna is configured to transmit electromagnetic energy into the formation and induce a voltage signal related to a parameter of the formation in the receiving antenna.

Abstract: A method is provided for checking the plausibility of insulation monitoring of a high-voltage system (100) of an electric vehicle during the charging of a traction battery of the electric vehicle. The electrical insulation of the high-voltage system (100) is monitored by an insulation monitoring device (101), and a check is carried out cyclically to determine whether a further insulation monitoring device is active on a high-voltage bus of the high-voltage system (100).

Abstract: Provided is a method for determination of a location of a short circuit fault in a generator arrangement, wherein the generator arrangement includes an electrical machine and at least one channel, wherein the or each channel includes a breaker, a converter unit and a set of stator windings of the electrical machine connected to the converter unit via the breaker, wherein upon an occurrence of a short circuit in a channel, the connection between the set of stator windings and the converter unit is interrupted by opening the breaker, wherein depending on at least one measured signal of a measurand, wherein the measured signal is measured by at least one sensor of the electric machine and wherein the measurand describes a torque ripple of the electrical machine, either the electrical machine or the converter unit of the channel is determined as location of the short circuit fault.

Abstract: A method for monitoring an ideal diode comprises controlling a source-gate voltage of a MOSFET of the ideal diode such that the ideal diode can be changed between an off and an on state with a first target value for a source-drain voltage. To detect error states, the source-drain voltage and the source-gate voltage are measured. A check is carried out to determine whether the source-drain voltage reaches the first target value within predefined error limits in the on state. A test mode is carried out, in which a second target value, smaller than the first target value, is set for the source-drain voltage. A check is carried out to determine whether the source-gate voltage reaches an upper threshold value when the test mode is being carried out. An error signal is output when the first target value and/or the upper threshold value is/are not reached.